platform/kernel/linux-starfive.git
6 years agommc: parse new binding for eMMC fixed driver type
Wolfram Sang [Sun, 15 Oct 2017 12:46:14 +0000 (14:46 +0200)]
mmc: parse new binding for eMMC fixed driver type

Parse the new binding and store it in the host struct after doing some
sanity checks. The code is designed to support fixed SD driver type if
we ever need that.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agodt-bindings: mmc: describe new eMMC binding for fixed driver type
Wolfram Sang [Sun, 15 Oct 2017 12:46:13 +0000 (14:46 +0200)]
dt-bindings: mmc: describe new eMMC binding for fixed driver type

Some boards may have to use a certain driver type (or drive strength) to
achieve stable eMMC communication. Describe a binding to set this up via
DT.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: usdhi6rol0: catch all errors when getting regulators
Wolfram Sang [Sat, 14 Oct 2017 19:17:19 +0000 (21:17 +0200)]
mmc: usdhi6rol0: catch all errors when getting regulators

Bail out everytime when mmc_regulator_get_supply() returns an errno, not
only when probing gets deferred. This is currently a no-op, because this
function only returns -EPROBE_DEFER or 0 right now. But if it will throw
another error somewhen, it will be for a reason. (This still doesn't change
that getting regulators is optional, so 0 can still mean no regulators
found). So, let us a) be future proof and b) have driver code which is
easier to understand.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: sdhci: catch all errors when getting regulators
Wolfram Sang [Sat, 14 Oct 2017 19:17:18 +0000 (21:17 +0200)]
mmc: sdhci: catch all errors when getting regulators

Bail out everytime when mmc_regulator_get_supply() returns an errno, not
only when probing gets deferred. This is currently a no-op, because this
function only returns -EPROBE_DEFER or 0 right now. But if it will throw
another error somewhen, it will be for a reason. (This still doesn't change
that getting regulators is optional, so 0 can still mean no regulators
found). So, let us a) be future proof and b) have driver code which is
easier to understand.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: omap_hsmmc: catch all errors when getting regulators
Wolfram Sang [Sat, 14 Oct 2017 19:17:17 +0000 (21:17 +0200)]
mmc: omap_hsmmc: catch all errors when getting regulators

Bail out everytime when mmc_regulator_get_supply() returns an errno, not
only when probing gets deferred. This is currently a no-op, because this
function only returns -EPROBE_DEFER or 0 right now. But if it will throw
another error somewhen, it will be for a reason. (This still doesn't change
that getting regulators is optional, so 0 can still mean no regulators
found). So, let us a) be future proof and b) have driver code which is
easier to understand.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: mxcmmc: catch all errors when getting regulators
Wolfram Sang [Sat, 14 Oct 2017 19:17:16 +0000 (21:17 +0200)]
mmc: mxcmmc: catch all errors when getting regulators

Bail out everytime when mmc_regulator_get_supply() returns an errno, not
only when probing gets deferred. This is currently a no-op, because this
function only returns -EPROBE_DEFER or 0 right now. But if it will throw
another error somewhen, it will be for a reason. (This still doesn't change
that getting regulators is optional, so 0 can still mean no regulators
found). So, let us a) be future proof and b) have driver code which is
easier to understand.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: mtk-sd: catch all errors when getting regulators
Wolfram Sang [Sat, 14 Oct 2017 19:17:15 +0000 (21:17 +0200)]
mmc: mtk-sd: catch all errors when getting regulators

Bail out everytime when mmc_regulator_get_supply() returns an errno, not
only when probing gets deferred. This is currently a no-op, because this
function only returns -EPROBE_DEFER or 0 right now. But if it will throw
another error somewhen, it will be for a reason. (This still doesn't change
that getting regulators is optional, so 0 can still mean no regulators
found). So, let us a) be future proof and b) have driver code which is
easier to understand.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: mmci: catch all errors when getting regulators
Wolfram Sang [Sat, 14 Oct 2017 19:17:14 +0000 (21:17 +0200)]
mmc: mmci: catch all errors when getting regulators

Bail out everytime when mmc_regulator_get_supply() returns an errno, not
only when probing gets deferred. This is currently a no-op, because this
function only returns -EPROBE_DEFER or 0 right now. But if it will throw
another error somewhen, it will be for a reason. (This still doesn't change
that getting regulators is optional, so 0 can still mean no regulators
found). So, let us a) be future proof and b) have driver code which is
easier to understand.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: meson-mx-sdio: catch all errors when getting regulators
Wolfram Sang [Sat, 14 Oct 2017 19:17:13 +0000 (21:17 +0200)]
mmc: meson-mx-sdio: catch all errors when getting regulators

Bail out everytime when mmc_regulator_get_supply() returns an errno, not
only when probing gets deferred. This is currently a no-op, because this
function only returns -EPROBE_DEFER or 0 right now. But if it will throw
another error somewhen, it will be for a reason. (This still doesn't change
that getting regulators is optional, so 0 can still mean no regulators
found). So, let us a) be future proof and b) have driver code which is
easier to understand.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: meson-gx-mmc: catch all errors when getting regulators
Wolfram Sang [Sat, 14 Oct 2017 19:17:12 +0000 (21:17 +0200)]
mmc: meson-gx-mmc: catch all errors when getting regulators

Bail out everytime when mmc_regulator_get_supply() returns an errno, not
only when probing gets deferred. This is currently a no-op, because this
function only returns -EPROBE_DEFER or 0 right now. But if it will throw
another error somewhen, it will be for a reason. (This still doesn't change
that getting regulators is optional, so 0 can still mean no regulators
found). So, let us a) be future proof and b) have driver code which is
easier to understand.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: dw_mmc: catch all errors when getting regulators
Wolfram Sang [Sat, 14 Oct 2017 19:17:11 +0000 (21:17 +0200)]
mmc: dw_mmc: catch all errors when getting regulators

Bail out everytime when mmc_regulator_get_supply() returns an errno, not
only when probing gets deferred. This is currently a no-op, because this
function only returns -EPROBE_DEFER or 0 right now. But if it will throw
another error somewhen, it will be for a reason. (This still doesn't change
that getting regulators is optional, so 0 can still mean no regulators
found). So, let us a) be future proof and b) have driver code which is
easier to understand.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: cavium: catch all errors when getting regulators
Wolfram Sang [Sat, 14 Oct 2017 19:17:10 +0000 (21:17 +0200)]
mmc: cavium: catch all errors when getting regulators

Bail out everytime when mmc_regulator_get_supply() returns an errno, not
only when probing gets deferred. This is currently a no-op, because this
function only returns -EPROBE_DEFER or 0 right now. But if it will throw
another error somewhen, it will be for a reason. (This still doesn't change
that getting regulators is optional, so 0 can still mean no regulators
found). So, let us a) be future proof and b) have driver code which is
easier to understand.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: add kerneldoc to mmc_regulator_get_supply()
Wolfram Sang [Sat, 14 Oct 2017 19:17:09 +0000 (21:17 +0200)]
mmc: add kerneldoc to mmc_regulator_get_supply()

Especially, make clear what the return value means.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: sdhci-cadence: use bitfield access macros for cleanup
Masahiro Yamada [Fri, 13 Oct 2017 12:50:31 +0000 (21:50 +0900)]
mmc: sdhci-cadence: use bitfield access macros for cleanup

Accessing register fields generally need mask and shift part.
Defining them separately, like SDHCI_CDNS_HRS06_TUNE_{SHIFT,MASK},
is tedious.

Register fields can be always defined by GENMASK (or, BIT if it it
a single bit).  They are nicely handled by FIELD_* macros.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: meson-mx-sdio: Cleanup IS_ERR() checks
Dan Carpenter [Fri, 13 Oct 2017 11:20:49 +0000 (14:20 +0300)]
mmc: meson-mx-sdio: Cleanup IS_ERR() checks

Using PTR_ERR_OR_ZERO() instead of IS_ERR() works, but it's not how
you're supposed to write these conditions.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: meson-mx-sdio: return correct error code
Dan Carpenter [Fri, 13 Oct 2017 11:19:43 +0000 (14:19 +0300)]
mmc: meson-mx-sdio: return correct error code

This has a copy and paste bug so we use "host->fixed_factor_clk" which
is a valid pointer instead of "host->cfg_div_clk" which holds the error
code.

Fixes: ed80a13bb4c4 ("mmc: meson-mx-sdio: Add a driver for the Amlogic Meson8 and Meson8b SoCs")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: core: export emmc revision
Jin Qian [Thu, 12 Oct 2017 17:46:59 +0000 (10:46 -0700)]
mmc: core: export emmc revision

Expose emmc revision as part of device attributes.

Signed-off-by: Jin Qian <jinqian@android.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: sdhci-msm: fix x86 build error
Arnd Bergmann [Tue, 10 Oct 2017 09:14:16 +0000 (11:14 +0200)]
mmc: sdhci-msm: fix x86 build error

The __WARN_printf() function is not portable across architectures
and causes a compile-time error on x86 and others that don't use
the asm-generic version of asm/bug.h:

drivers/mmc/host/sdhci-msm.c: In function 'sdhci_msm_check_power_status':
drivers/mmc/host/sdhci-msm.c:1066:4: error: implicit declaration of function '__WARN_printf'; did you mean '__dev_printk'? [-Werror=implicit-function-declaration]
    __WARN_printf("%s: pwr_irq for req: (%d) timed out\n",
    ^~~~~~~~~~~~~

The change that introduced this error, "mmc: sdhci-msm: Add sdhci msm
register write APIs which wait for pwr irq", likely meant to use
dev_warn(), so I'm changing over to that.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: tmio: check mmc_regulator_get_supply return value
Fabrizio Castro [Fri, 22 Sep 2017 11:22:17 +0000 (12:22 +0100)]
mmc: tmio: check mmc_regulator_get_supply return value

mmc_regulator_get_supply returns -EPROBE_DEFER if either vmmc or
vqmmc regulators had their probing deferred.
vqmmc regulator is needed by UHS to work properly, therefore this
patch checks the value returned by mmc_regulator_get_supply to
make sure we have a reference to both vmmc and vqmmc (if found in
the DT).

Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: sunxi: drop superfluous error message
Wolfram Sang [Sun, 8 Oct 2017 14:50:08 +0000 (16:50 +0200)]
mmc: sunxi: drop superfluous error message

This error message can go because a) currently nothing else than
EPROBE_DEFER is returned and b) if this is going to change a much more
detailed error message should come from mmc_regulator_get_supply()
anyhow.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: meson-mx-sdio: Add a driver for the Amlogic Meson8 and Meson8b SoCs
Carlo Caione [Tue, 3 Oct 2017 11:24:17 +0000 (13:24 +0200)]
mmc: meson-mx-sdio: Add a driver for the Amlogic Meson8 and Meson8b SoCs

Add a driver for the SDIO/MMC host found on the Amlogic Meson SoCs. This
is an MMC controller which provides an interface between the application
processor and various memory cards. It supports the SD specification
v2.0 and the eMMC specification v4.41.

The controller provides an internal "mux" which allows connecting up to
three MMC devices to it. Only one device can be used at a time though
since the registers are shared across all devices. The driver takes care
of synchronizing access (similar to the dw_mmc driver).
The maximum supported bus-width is 4-bits.

Amlogic's GPL kernel sources call the corresponding driver "aml_sdio" to
differentiate it from the other MMC controller in (at least the Meson8
and Meson8b) the SoCs (they call the other drivers aml_sdhc and
aml_sdhc_m8, which seem to support a bus-width of up to 8-bits). This
means that there are three different MMC host controller IP blocks from
Amlogic (each of them with completely own register layout and features):
- "SDIO": 1 and 4 bit bus width, support for high-speed modes up to
  UHS-I SDR50, part of Meson6, Meson8 and Meson8b (the driver from this
  patch targets this controller)
- "SDHC": 1, 4 and 8 bit bus width, compatible with standard iNAND
  interface, support for speeds up to HS200 and MMC spec up to version
  4.5x, part of Meson8 and Meson8b SoCs (there is no mainline driver
  for this controller yet)
- "SDEMMC": 1, 4 and 8 bit bus width, support for speeds up to HS400
  and MMC spec up to version 5.0, part of the Meson GX (64-bit) SoCs
  (supported by the meson-gx MMC host driver)

Signed-off-by: Carlo Caione <carlo@endlessm.com>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agodt-bindings: mmc: Document the Amlogic Meson8 and Meson8b SDIO bindings
Carlo Caione [Tue, 3 Oct 2017 11:24:16 +0000 (13:24 +0200)]
dt-bindings: mmc: Document the Amlogic Meson8 and Meson8b SDIO bindings

This documents the devicetree bindings for the SDIO/MMC host found in
Amlogic Meson8 and Meson8b SoCs. It supports the SD specification v2.0
and the eMMC specification v4.41.
It has an internal "mux" which allows connecting up to three MMC devices
to it. The maximum supported bus-width is 4-bits.

Amlogic's GPL kernel sources call it "SDIO" to differentiate it from the
other MMC controller in (at least the Meson8 and Meson8b) the SoCs (they
call the other one "SDHC", which supports a bus-width of up to 8-bits).

Signed-off-by: Carlo Caione <carlo@endlessm.com>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: sdhci-of-at91: make function sdhci_at91_set_uhs_signaling static
Colin Ian King [Tue, 3 Oct 2017 10:06:36 +0000 (11:06 +0100)]
mmc: sdhci-of-at91: make function sdhci_at91_set_uhs_signaling static

The function sdhci_at91_set_uhs_signaling  is local to the source and does
not need to be in global scope, so make it static.

Cleans up sparse warning:
symbol 'sdhci_at91_set_uhs_signaling' was not declared. Should it be
static?

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: dw_mmc-k3: make array hs_timing_cfg static
Colin Ian King [Tue, 3 Oct 2017 09:56:54 +0000 (10:56 +0100)]
mmc: dw_mmc-k3: make array hs_timing_cfg static

The array hs_timing_cfg is local to the source and does not need to
be in global scope, so make it static.

Cleans up sparse warning:
symbol 'hs_timing_cfg' was not declared. Should it be static?

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: sdhci-s3c: Fix driver data for Exynos4 SoCs
Marek Szyprowski [Wed, 4 Oct 2017 06:38:24 +0000 (08:38 +0200)]
mmc: sdhci-s3c: Fix driver data for Exynos4 SoCs

Support for non-dt based initialization for Exynos SoCs has been removed,
so there is no need to keep driver IDs for this case. While touching this,
replace odd conditional code for instantiating driver data for Exynos4
SoCs with a simple reference and move that driver data under CONFIG_OF.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: cavium: Depend on GPIO driver
Jan Glauber [Mon, 2 Oct 2017 12:02:41 +0000 (14:02 +0200)]
mmc: cavium: Depend on GPIO driver

Without the ThunderX/OcteonTx GPIO driver the MMC driver
would not power up any MMC devices. Therefore add a
dependency to the GPIO driver and remove the unneeded GPIOLIB
dependency.

Signed-off-by: Jan Glauber <jglauber@cavium.com>
Acked-by: David Daney <david.daney@cavium.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: sdhci-msm: Add sdhci msm register write APIs which wait for pwr irq
Vijay Viswanath [Wed, 27 Sep 2017 05:34:43 +0000 (11:04 +0530)]
mmc: sdhci-msm: Add sdhci msm register write APIs which wait for pwr irq

Register writes which change voltage of IO lines or turn the IO bus
on/off require controller to be ready before progressing further. When
the controller is ready, it will generate a power irq which needs to be
handled. The thread which initiated the register write should wait for
power irq to complete. This will be done through the new sdhc msm write
APIs which will check whether the particular write can trigger a power
irq and wait for it with a timeout if it is expected.
The SDHC core power control IRQ gets triggered when -
* There is a state change in power control bit (bit 0)
  of SDHCI_POWER_CONTROL register.
* There is a state change in 1.8V enable bit (bit 3) of
  SDHCI_HOST_CONTROL2 register.
* Bit 1 of SDHCI_SOFTWARE_RESET is set.

Also add support APIs which are used by sdhc msm write APIs to check
if power irq is expected to be generated and wait for the power irq
to come and complete if the irq is expected.

This patch requires CONFIG_MMC_SDHCI_IO_ACCESSORS to be enabled.

Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: Vijay Viswanath <vviswana@codeaurora.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: Kconfig: Enable CONFIG_MMC_SDHCI_IO_ACCESSORS
Vijay Viswanath [Wed, 27 Sep 2017 05:34:42 +0000 (11:04 +0530)]
mmc: Kconfig: Enable CONFIG_MMC_SDHCI_IO_ACCESSORS

Enable CONFIG_MMC_SDHCI_IO_ACCESSORS so that SDHC controller specific
register read and write APIs, if registered, can be used.

Signed-off-by: Vijay Viswanath <vviswana@codeaurora.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: sdhci-msm: Fix HW issue with power IRQ handling during reset
Sahitya Tummala [Wed, 27 Sep 2017 05:34:41 +0000 (11:04 +0530)]
mmc: sdhci-msm: Fix HW issue with power IRQ handling during reset

There is a rare scenario in HW, where the first clear pulse could
be lost when the actual reset and clear/read of status register
are happening at the same time. Fix this by retrying upto 10 times
to ensure the status register gets cleared. Otherwise, this will
lead to a spurious power IRQ which results in system instability.

Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: Vijay Viswanath <vviswana@codeaurora.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: sdhci-msm: fix issue with power irq
Subhash Jadavani [Wed, 27 Sep 2017 05:34:40 +0000 (11:04 +0530)]
mmc: sdhci-msm: fix issue with power irq

SDCC controller reset (SW_RST) during probe may trigger power irq if
previous status of PWRCTL was either BUS_ON or IO_HIGH_V. So before we
enable the power irq interrupt in GIC (by registering the interrupt
handler), we need to ensure that any pending power irq interrupt status
is acknowledged otherwise power irq interrupt handler would be fired
prematurely.

Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Vijay Viswanath <vviswana@codeaurora.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: sd: Fix signal voltage when there is no power cycle
Adrian Hunter [Mon, 25 Sep 2017 08:29:04 +0000 (11:29 +0300)]
mmc: sd: Fix signal voltage when there is no power cycle

Some boards have SD card connectors where the power rail cannot be switched
off by the driver. However there are various circumstances when a card
might be re-initialized, such as after system resume, warm re-boot, or
error handling. However, a UHS card will continue to use 1.8V signaling
unless it is power cycled.

If the card has not been power cycled, it may still be using 1.8V
signaling. According to the SD spec., the Bus Speed Mode (function group 1)
bits 2 to 4 are zero if the card is initialized at 3.3V signal level. Thus
they can be used to determine if the card has already switched to 1.8V
signaling. Detect that situation and try to initialize a UHS-I (1.8V)
transfer mode.

Tested with the following cards:
  Transcend 4GB High Speed
  Kingston 64GB SDR104
  Lexar by Micron HIGH-PERFORMANCE 300x 16GB DDR50
  SanDisk Ultra 8GB DDR50
  Transcend Ultimate 600x 16GB SDR104
  Transcend Premium 300x 64GB SDR104
  Lexar by Micron Professional 1000x 32GB UHS-II SDR104
  SanDisk Extreme Pro 16GB SDR104

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Zhoujie Wu <zjwu@marvell.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: core: Factor out mmc_host_set_uhs_voltage()
Adrian Hunter [Mon, 25 Sep 2017 08:29:03 +0000 (11:29 +0300)]
mmc: core: Factor out mmc_host_set_uhs_voltage()

Factor out mmc_host_set_uhs_voltage() so it can be reused.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: core: Export a few functions needed for blkmq support
Adrian Hunter [Fri, 22 Sep 2017 12:36:59 +0000 (15:36 +0300)]
mmc: core: Export a few functions needed for blkmq support

The following functions are needed by the mmc block device driver, once it
converts to blkmq, therefore let's export them.

mmc_start_bkops()
mmc_start_request()
mmc_retune_hold_now()
mmc_retune_release()

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: dw_mmc: make const arrays mszs static
Colin Ian King [Sun, 3 Sep 2017 13:39:50 +0000 (14:39 +0100)]
mmc: dw_mmc: make const arrays mszs static

Don't populate the const arrays mszs on the stack, instead make them
static. Makes the object code smaller by over 310 bytes:

Before:
   text    data     bss     dec     hex filename
  47527    8528     320   56375    dc37 drivers/mmc/host/dw_mmc.o

After:
   text    data     bss     dec     hex filename
  47055    8688     320   56063    daff drivers/mmc/host/dw_mmc.o

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: dw_mmc: correct outdated comment for use_dma
Ziyuan [Wed, 30 Aug 2017 02:58:21 +0000 (10:58 +0800)]
mmc: dw_mmc: correct outdated comment for use_dma

Since commit 3fc7eaef44db ("mmc: dw_mmc: Add external dma interface
support") use_dma no longer means only the data transfer mode, and
includes dma transmission channel. So make it more clear.

Signed-off-by: Ziyuan <ziyuan.biubiu@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc-host: mxcmmc: use setup_timer() helper.
Allen [Fri, 22 Sep 2017 12:07:26 +0000 (17:37 +0530)]
mmc-host: mxcmmc: use setup_timer() helper.

Use setup_timer function instead of initializing timer with the
   function and data fields.

Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc-host: vub300: use setup_timer() helper.
Allen [Fri, 22 Sep 2017 12:07:25 +0000 (17:37 +0530)]
mmc-host: vub300: use setup_timer() helper.

Use setup_timer function instead of initializing timer with the
   function and data fields.

Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc-host: via: use setup_timer() helper.
Allen [Fri, 22 Sep 2017 12:07:24 +0000 (17:37 +0530)]
mmc-host: via: use setup_timer() helper.

Use setup_timer function instead of initializing timer with the
   function and data fields.

Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc-host: wbsd: use setup_timer() helper.
Allen [Fri, 22 Sep 2017 12:07:23 +0000 (17:37 +0530)]
mmc-host: wbsd: use setup_timer() helper.

Use setup_timer function instead of initializing timer with the
   function and data fields.

Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: rtsx: fix tuning fail on gen3 PCI-Express
rui_feng [Fri, 22 Sep 2017 08:07:35 +0000 (16:07 +0800)]
mmc: rtsx: fix tuning fail on gen3 PCI-Express

On gen3 PCI-Express we should send command one by one.
If sending many commands in one packet will lead to a failure.

Signed-off-by: rui_feng <rui_feng@realsil.com.cn>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: block: Factor out mmc_setup_queue()
Adrian Hunter [Fri, 22 Sep 2017 12:36:57 +0000 (15:36 +0300)]
mmc: block: Factor out mmc_setup_queue()

Factor out some common code that will also be used with blk-mq.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: block: Prepare CQE data
Adrian Hunter [Fri, 22 Sep 2017 12:36:56 +0000 (15:36 +0300)]
mmc: block: Prepare CQE data

Enhance mmc_blk_data_prep() to support CQE requests. That means adding
some things that for non-CQE requests would be encoded into the command
arguments - such as the block address, reliable-write flag, and data tag
flag. Also the request tag is needed to provide the command queue task id,
and a comment is added to explain the future possibility of defining a
priority.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: block: Use local variables in mmc_blk_data_prep()
Adrian Hunter [Fri, 22 Sep 2017 12:36:55 +0000 (15:36 +0300)]
mmc: block: Use local variables in mmc_blk_data_prep()

Use local variables in mmc_blk_data_prep() in preparation for adding CQE
support which doesn't use the output variables.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: mmc: Enable CQE's
Adrian Hunter [Fri, 22 Sep 2017 12:36:54 +0000 (15:36 +0300)]
mmc: mmc: Enable CQE's

Enable or disable CQE when a card is added or removed respectively.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: mmc: Enable Command Queuing
Adrian Hunter [Fri, 22 Sep 2017 12:36:53 +0000 (15:36 +0300)]
mmc: mmc: Enable Command Queuing

Enable the Command Queue if the host controller supports a command queue
engine. It is not compatible with Packed Commands, so make a note of that in the
comment.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: core: Add support for handling CQE requests
Adrian Hunter [Fri, 22 Sep 2017 12:36:52 +0000 (15:36 +0300)]
mmc: core: Add support for handling CQE requests

Add core support for handling CQE requests, including starting, completing
and recovering.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: core: Introduce host claiming by context
Adrian Hunter [Fri, 22 Sep 2017 12:36:51 +0000 (15:36 +0300)]
mmc: core: Introduce host claiming by context

Currently the host can be claimed by a task.  Change this so that the host
can be claimed by a context that may or may not be a task.  This provides
for the host to be claimed by a block driver queue to support blk-mq, while
maintaining compatibility with the existing use of mmc_claim_host().

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: core: Remove unnecessary host claim
Adrian Hunter [Fri, 22 Sep 2017 12:36:50 +0000 (15:36 +0300)]
mmc: core: Remove unnecessary host claim

Callers already have the host claimed, so remove the unnecessary
calls to mmc_claim_host() and mmc_release_host().

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: block: Fix bug when removing RPMB chardev
Linus Walleij [Wed, 4 Oct 2017 09:10:07 +0000 (11:10 +0200)]
mmc: block: Fix bug when removing RPMB chardev

I forgot to account for the fact that the device core holds a
reference to a device added with device_initialize() that need
to be released with a corresponding put_device() to reach a 0
refcount at the end of the lifecycle.

This led to a NULL pointer reference when freeing the device
when e.g. unbidning the host device in sysfs.

Fix this and use the device .release() callback to free the
IDA and free:ing the memory used by the RPMB device.

Before this patch:

/sys/bus/amba/drivers/mmci-pl18x$ echo 80114000.sdi4_per2 > unbind
[   29.797332] mmc3: card 0001 removed
[   29.810791] Unable to handle kernel NULL pointer dereference at
               virtual address 00000050
[   29.818878] pgd = de70c000
[   29.821624] [00000050] *pgd=1e70a831, *pte=00000000, *ppte=00000000
[   29.827911] Internal error: Oops: 17 [#1] PREEMPT SMP ARM
[   29.833282] Modules linked in:
[   29.836334] CPU: 1 PID: 154 Comm: sh Not tainted
               4.14.0-rc3-00039-g83318e309566-dirty #736
[   29.844604] Hardware name: ST-Ericsson Ux5x0 platform (Device Tree Support)
[   29.851562] task: de572700 task.stack: de742000
[   29.856079] PC is at kernfs_find_ns+0x8/0x100
[   29.860443] LR is at kernfs_find_and_get_ns+0x30/0x48

After this patch:

/sys/bus/amba/drivers/mmci-pl18x$ echo 80005000.sdi4_per2 > unbind
[   20.623382] mmc3: card 0001 removed

Fixes: 97548575bef3 ("mmc: block: Convert RPMB to a character device")
Reported-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: block: Delete mmc_access_rpmb()
Linus Walleij [Wed, 20 Sep 2017 08:02:01 +0000 (10:02 +0200)]
mmc: block: Delete mmc_access_rpmb()

This function is used by the block layer queue to bail out of
requests if the current request is towards an RPMB
"block device".

This was done to avoid boot time scanning of this "block
device" which was never really a block device, thus duct-taping
over the fact that it was badly engineered.

This problem is now gone as we removed the offending RPMB block
device in another patch and replaced it with a character
device.

Cc: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: block: Convert RPMB to a character device
Linus Walleij [Wed, 20 Sep 2017 08:02:00 +0000 (10:02 +0200)]
mmc: block: Convert RPMB to a character device

The RPMB partition on the eMMC devices is a special area used
for storing cryptographically safe information signed by a
special secret key. To write and read records from this special
area, authentication is needed.

The RPMB area is *only* and *exclusively* accessed using
ioctl():s from userspace. It is not really a block device,
as blocks cannot be read or written from the device, also
the signed chunks that can be stored on the RPMB are actually
256 bytes, not 512 making a block device a real bad fit.

Currently the RPMB partition spawns a separate block device
named /dev/mmcblkNrpmb for each device with an RPMB partition,
including the creation of a block queue with its own kernel
thread and all overhead associated with this. On the Ux500
HREFv60 platform, for example, the two eMMCs means that two
block queues with separate threads are created for no use
whatsoever.

I have concluded that this block device design for RPMB is
actually pretty wrong. The RPMB area should have been designed
to be accessed from /dev/mmcblkN directly, using ioctl()s on
the main block device. It is however way too late to change
that, since userspace expects to open an RPMB device in
/dev/mmcblkNrpmb and we cannot break userspace.

This patch tries to amend the situation using the following
strategy:

- Stop creating a block device for the RPMB partition/area

- Instead create a custom, dynamic character device with
  the same name.

- Make this new character device support exactly the same
  set of ioctl()s as the old block device.

- Wrap the requests back to the same ioctl() handlers, but
  issue them on the block queue of the main partition/area,
  i.e. /dev/mmcblkN

We need to create a special "rpmb" bus type in order to get
udev and/or busybox hot/coldplug to instantiate the device
node properly.

Before the patch, this appears in 'ps aux':

101 root       0:00 [mmcqd/2rpmb]
123 root       0:00 [mmcqd/3rpmb]

After applying the patch these surplus block queue threads
are gone, but RPMB is as usable as ever using the userspace
MMC tools, such as 'mmc rpmb read-counter'.

We get instead those dynamice devices in /dev:

brw-rw----    1 root     root      179,   0 Jan  1  2000 mmcblk0
brw-rw----    1 root     root      179,   1 Jan  1  2000 mmcblk0p1
brw-rw----    1 root     root      179,   2 Jan  1  2000 mmcblk0p2
brw-rw----    1 root     root      179,   5 Jan  1  2000 mmcblk0p5
brw-rw----    1 root     root      179,   8 Jan  1  2000 mmcblk2
brw-rw----    1 root     root      179,  16 Jan  1  2000 mmcblk2boot0
brw-rw----    1 root     root      179,  24 Jan  1  2000 mmcblk2boot1
crw-rw----    1 root     root      248,   0 Jan  1  2000 mmcblk2rpmb
brw-rw----    1 root     root      179,  32 Jan  1  2000 mmcblk3
brw-rw----    1 root     root      179,  40 Jan  1  2000 mmcblk3boot0
brw-rw----    1 root     root      179,  48 Jan  1  2000 mmcblk3boot1
brw-rw----    1 root     root      179,  33 Jan  1  2000 mmcblk3p1
crw-rw----    1 root     root      248,   1 Jan  1  2000 mmcblk3rpmb

Notice the (248,0) and (248,1) character devices for RPMB.

Cc: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: sdhci-of-esdhc: disable SD clock for clock value 0
yangbo lu [Thu, 21 Sep 2017 08:43:31 +0000 (16:43 +0800)]
mmc: sdhci-of-esdhc: disable SD clock for clock value 0

SD clock should be disabled for clock value 0. It's not
right to just return. This may cause failure of signal
voltage switching.

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: sdhci-pci: Add support for Intel CDF
Adrian Hunter [Mon, 18 Sep 2017 12:17:05 +0000 (15:17 +0300)]
mmc: sdhci-pci: Add support for Intel CDF

Add PCI Id for Intel CDF.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: sdhci-pci: remove outdated declaration
Wolfram Sang [Fri, 15 Sep 2017 18:13:28 +0000 (20:13 +0200)]
mmc: sdhci-pci: remove outdated declaration

The function was removed half a year ago, so this declaration can go,
too.

Fixes: 51ced59cc02e0d ("mmc: sdhci-pci: Use ACPI DSM to get driver strength for some Intel devices")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: sdhci-msm: Enable delay circuit calibration clocks
Bjorn Andersson [Fri, 15 Sep 2017 23:35:24 +0000 (16:35 -0700)]
mmc: sdhci-msm: Enable delay circuit calibration clocks

The delay circuit used to support HS400 is calibrated based on two
additional clocks. When these clocks are not available and
FF_CLK_SW_RST_DIS is not set in CORE_HC_MODE, reset might fail. But on
some platforms this doesn't work properly and below dump can be seen in
the kernel log.

  mmc0: Reset 0x1 never completed.
  mmc0: sdhci: ============ SDHCI REGISTER DUMP ===========
  mmc0: sdhci: Sys addr:  0x00000000 | Version:  0x00001102
  mmc0: sdhci: Blk size:  0x00004000 | Blk cnt:  0x00000000
  mmc0: sdhci: Argument:  0x00000000 | Trn mode: 0x00000000
  mmc0: sdhci: Present:   0x01f80000 | Host ctl: 0x00000000
  mmc0: sdhci: Power:     0x00000000 | Blk gap:  0x00000000
  mmc0: sdhci: Wake-up:   0x00000000 | Clock:    0x00000002
  mmc0: sdhci: Timeout:   0x00000000 | Int stat: 0x00000000
  mmc0: sdhci: Int enab:  0x00000000 | Sig enab: 0x00000000
  mmc0: sdhci: AC12 err:  0x00000000 | Slot int: 0x00000000
  mmc0: sdhci: Caps:      0x742dc8b2 | Caps_1:   0x00008007
  mmc0: sdhci: Cmd:       0x00000000 | Max curr: 0x00000000
  mmc0: sdhci: Resp[0]:   0x00000000 | Resp[1]:  0x00000000
  mmc0: sdhci: Resp[2]:   0x00000000 | Resp[3]:  0x00000000
  mmc0: sdhci: Host ctl2: 0x00000000
  mmc0: sdhci: ============================================

Add support for the additional calibration clocks to allow these
platforms to be configured appropriately.

Cc: Venkat Gopalakrishnan <venkatg@codeaurora.org>
Cc: Ritesh Harjani <riteshh@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Tested-by: Jeremy McNicoll <jeremymc@redhat.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: sdhci-msm: Utilize bulk clock API
Bjorn Andersson [Fri, 15 Sep 2017 23:35:23 +0000 (16:35 -0700)]
mmc: sdhci-msm: Utilize bulk clock API

By stuffing the runtime controlled clocks into a clk_bulk_data array we
can utilize the newly introduced bulk clock operations and clean up the
error paths. This allow us to handle additional clocks in subsequent
patch, without the added complexity.

Cc: Ritesh Harjani <riteshh@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: Jeremy McNicoll <jeremymc@redhat.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agommc: tegra: Mark 64 bit dma broken on Tegra186
Krishna Reddy [Fri, 8 Sep 2017 19:48:33 +0000 (12:48 -0700)]
mmc: tegra: Mark 64 bit dma broken on Tegra186

SDHCI controllers on Tegra186 support 40 bit addressing.
IOVA addresses are 48-bit wide on Tegra186.
SDHCI host common code sets dma mask as either 32-bit or 64-bit.
To avoid access issues when SMMU is enabled, disable 64-bit dma.

Signed-off-by: Krishna Reddy <vdumpa@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
6 years agoMerge branch 'fixes' into next
Ulf Hansson [Mon, 30 Oct 2017 10:37:50 +0000 (11:37 +0100)]
Merge branch 'fixes' into next

6 years agoMerge branch 'omap_hsmmc' into next
Ulf Hansson [Mon, 30 Oct 2017 10:36:42 +0000 (11:36 +0100)]
Merge branch 'omap_hsmmc' into next

6 years agoLinux 4.14-rc7
Linus Torvalds [Sun, 29 Oct 2017 20:58:38 +0000 (13:58 -0700)]
Linux 4.14-rc7

6 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Sun, 29 Oct 2017 15:11:49 +0000 (08:11 -0700)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Fix route leak in xfrm_bundle_create().

 2) In mac80211, validate user rate mask before configuring it. From
    Johannes Berg.

 3) Properly enforce memory limits in fair queueing code, from Toke
    Hoiland-Jorgensen.

 4) Fix lockdep splat in inet_csk_route_req(), from Eric Dumazet.

 5) Fix TSO header allocation and management in mvpp2 driver, from Yan
    Markman.

 6) Don't take socket lock in BH handler in strparser code, from Tom
    Herbert.

 7) Don't show sockets from other namespaces in AF_UNIX code, from
    Andrei Vagin.

 8) Fix double free in error path of tap_open(), from Girish Moodalbail.

 9) Fix TX map failure path in igb and ixgbe, from Jean-Philippe Brucker
    and Alexander Duyck.

10) Fix DCB mode programming in stmmac driver, from Jose Abreu.

11) Fix err_count handling in various tunnels (ipip, ip6_gre). From Xin
    Long.

12) Properly align SKB head before building SKB in tuntap, from Jason
    Wang.

13) Avoid matching qdiscs with a zero handle during lookups, from Cong
    Wang.

14) Fix various endianness bugs in sctp, from Xin Long.

15) Fix tc filter callback races and add selftests which trigger the
    problem, from Cong Wang.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (73 commits)
  selftests: Introduce a new test case to tc testsuite
  selftests: Introduce a new script to generate tc batch file
  net_sched: fix call_rcu() race on act_sample module removal
  net_sched: add rtnl assertion to tcf_exts_destroy()
  net_sched: use tcf_queue_work() in tcindex filter
  net_sched: use tcf_queue_work() in rsvp filter
  net_sched: use tcf_queue_work() in route filter
  net_sched: use tcf_queue_work() in u32 filter
  net_sched: use tcf_queue_work() in matchall filter
  net_sched: use tcf_queue_work() in fw filter
  net_sched: use tcf_queue_work() in flower filter
  net_sched: use tcf_queue_work() in flow filter
  net_sched: use tcf_queue_work() in cgroup filter
  net_sched: use tcf_queue_work() in bpf filter
  net_sched: use tcf_queue_work() in basic filter
  net_sched: introduce a workqueue for RCU callbacks of tc filter
  sctp: fix some type cast warnings introduced since very beginning
  sctp: fix a type cast warnings that causes a_rwnd gets the wrong value
  sctp: fix some type cast warnings introduced by transport rhashtable
  sctp: fix some type cast warnings introduced by stream reconf
  ...

6 years agoMerge branch 'net_sched-fix-races-with-RCU-callbacks'
David S. Miller [Sun, 29 Oct 2017 13:49:32 +0000 (22:49 +0900)]
Merge branch 'net_sched-fix-races-with-RCU-callbacks'

Cong Wang says:

====================
net_sched: fix races with RCU callbacks

Recently, the RCU callbacks used in TC filters and TC actions keep
drawing my attention, they introduce at least 4 race condition bugs:

1. A simple one fixed by Daniel:

commit c78e1746d3ad7d548bdf3fe491898cc453911a49
Author: Daniel Borkmann <daniel@iogearbox.net>
Date:   Wed May 20 17:13:33 2015 +0200

    net: sched: fix call_rcu() race on classifier module unloads

2. A very nasty one fixed by me:

commit 1697c4bb5245649a23f06a144cc38c06715e1b65
Author: Cong Wang <xiyou.wangcong@gmail.com>
Date:   Mon Sep 11 16:33:32 2017 -0700

    net_sched: carefully handle tcf_block_put()

3. Two more bugs found by Chris:
https://patchwork.ozlabs.org/patch/826696/
https://patchwork.ozlabs.org/patch/826695/

Usually RCU callbacks are simple, however for TC filters and actions,
they are complex because at least TC actions could be destroyed
together with the TC filter in one callback. And RCU callbacks are
invoked in BH context, without locking they are parallel too. All of
these contribute to the cause of these nasty bugs.

Alternatively, we could also:

a) Introduce a spinlock to serialize these RCU callbacks. But as I
said in commit 1697c4bb5245 ("net_sched: carefully handle
tcf_block_put()"), it is very hard to do because of tcf_chain_dump().
Potentially we need to do a lot of work to make it possible (if not
impossible).

b) Just get rid of these RCU callbacks, because they are not
necessary at all, callers of these call_rcu() are all on slow paths
and holding RTNL lock, so blocking is allowed in their contexts.
However, David and Eric dislike adding synchronize_rcu() here.

As suggested by Paul, we could defer the work to a workqueue and
gain the permission of holding RTNL again without any performance
impact, however, in tcf_block_put() we could have a deadlock when
flushing workqueue while hodling RTNL lock, the trick here is to
defer the work itself in workqueue and make it queued after all
other works so that we keep the same ordering to avoid any
use-after-free. Please see the first patch for details.

Patch 1 introduces the infrastructure, patch 2~12 move each
tc filter to the new tc filter workqueue, patch 13 adds
an assertion to catch potential bugs like this, patch 14
closes another rcu callback race, patch 15 and patch 16 add
new test cases.
====================

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agoselftests: Introduce a new test case to tc testsuite
Chris Mi [Fri, 27 Oct 2017 01:24:43 +0000 (18:24 -0700)]
selftests: Introduce a new test case to tc testsuite

In this patchset, we fixed a tc bug. This patch adds the test case
that reproduces the bug. To run this test case, user should specify
an existing NIC device:
  # sudo ./tdc.py -d enp4s0f0

This test case belongs to category "flower". If user doesn't specify
a NIC device, the test cases belong to "flower" will not be run.

In this test case, we create 1M filters and all filters share the same
action. When destroying all filters, kernel should not panic. It takes
about 18s to run it.

Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Lucas Bates <lucasb@mojatatu.com>
Signed-off-by: Chris Mi <chrism@mellanox.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agoselftests: Introduce a new script to generate tc batch file
Chris Mi [Fri, 27 Oct 2017 01:24:42 +0000 (18:24 -0700)]
selftests: Introduce a new script to generate tc batch file

  # ./tdc_batch.py -h
  usage: tdc_batch.py [-h] [-n NUMBER] [-o] [-s] [-p] device file

  TC batch file generator

  positional arguments:
    device                device name
    file                  batch file name

  optional arguments:
    -h, --help            show this help message and exit
    -n NUMBER, --number NUMBER
                          how many lines in batch file
    -o, --skip_sw         skip_sw (offload), by default skip_hw
    -s, --share_action    all filters share the same action
    -p, --prio            all filters have different prio

Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Lucas Bates <lucasb@mojatatu.com>
Signed-off-by: Chris Mi <chrism@mellanox.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet_sched: fix call_rcu() race on act_sample module removal
Cong Wang [Fri, 27 Oct 2017 01:24:41 +0000 (18:24 -0700)]
net_sched: fix call_rcu() race on act_sample module removal

Similar to commit c78e1746d3ad
("net: sched: fix call_rcu() race on classifier module unloads"),
we need to wait for flying RCU callback tcf_sample_cleanup_rcu().

Cc: Yotam Gigi <yotamg@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet_sched: add rtnl assertion to tcf_exts_destroy()
Cong Wang [Fri, 27 Oct 2017 01:24:40 +0000 (18:24 -0700)]
net_sched: add rtnl assertion to tcf_exts_destroy()

After previous patches, it is now safe to claim that
tcf_exts_destroy() is always called with RTNL lock.

Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet_sched: use tcf_queue_work() in tcindex filter
Cong Wang [Fri, 27 Oct 2017 01:24:39 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in tcindex filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet_sched: use tcf_queue_work() in rsvp filter
Cong Wang [Fri, 27 Oct 2017 01:24:38 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in rsvp filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet_sched: use tcf_queue_work() in route filter
Cong Wang [Fri, 27 Oct 2017 01:24:37 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in route filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet_sched: use tcf_queue_work() in u32 filter
Cong Wang [Fri, 27 Oct 2017 01:24:36 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in u32 filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet_sched: use tcf_queue_work() in matchall filter
Cong Wang [Fri, 27 Oct 2017 01:24:35 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in matchall filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet_sched: use tcf_queue_work() in fw filter
Cong Wang [Fri, 27 Oct 2017 01:24:34 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in fw filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet_sched: use tcf_queue_work() in flower filter
Cong Wang [Fri, 27 Oct 2017 01:24:33 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in flower filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet_sched: use tcf_queue_work() in flow filter
Cong Wang [Fri, 27 Oct 2017 01:24:32 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in flow filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet_sched: use tcf_queue_work() in cgroup filter
Cong Wang [Fri, 27 Oct 2017 01:24:31 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in cgroup filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet_sched: use tcf_queue_work() in bpf filter
Cong Wang [Fri, 27 Oct 2017 01:24:30 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in bpf filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet_sched: use tcf_queue_work() in basic filter
Cong Wang [Fri, 27 Oct 2017 01:24:29 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in basic filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet_sched: introduce a workqueue for RCU callbacks of tc filter
Cong Wang [Fri, 27 Oct 2017 01:24:28 +0000 (18:24 -0700)]
net_sched: introduce a workqueue for RCU callbacks of tc filter

This patch introduces a dedicated workqueue for tc filters
so that each tc filter's RCU callback could defer their
action destroy work to this workqueue. The helper
tcf_queue_work() is introduced for them to use.

Because we hold RTNL lock when calling tcf_block_put(), we
can not simply flush works inside it, therefore we have to
defer it again to this workqueue and make sure all flying RCU
callbacks have already queued their work before this one, in
other words, to ensure this is the last one to execute to
prevent any use-after-free.

On the other hand, this makes tcf_block_put() ugly and
harder to understand. Since David and Eric strongly dislike
adding synchronize_rcu(), this is probably the only
solution that could make everyone happy.

Please also see the code comments below.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agoMerge branch 'sctp-endianness-fixes'
David S. Miller [Sun, 29 Oct 2017 09:03:25 +0000 (18:03 +0900)]
Merge branch 'sctp-endianness-fixes'

Xin Long says:

====================
sctp: a bunch of fixes for some sparse warnings

As Eric noticed, when running 'make C=2 M=net/sctp/', a plenty of
warnings or errors checked by sparse appear. They are all problems
about Endian and type cast.

Most of them are just warnings by which no issues could be caused
while some might be bugs.

This patchset fixes them with four patches basically according to
how they are introduced.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agosctp: fix some type cast warnings introduced since very beginning
Xin Long [Sat, 28 Oct 2017 11:43:57 +0000 (19:43 +0800)]
sctp: fix some type cast warnings introduced since very beginning

These warnings were found by running 'make C=2 M=net/sctp/'.
They are there since very beginning.

Note after this patch, there still one warning left in
sctp_outq_flush():
  sctp_chunk_fail(chunk, SCTP_ERROR_INV_STRM)

Since it has been moved to sctp_stream_outq_migrate on net-next,
to avoid the extra job when merging net-next to net, I will post
the fix for it after the merging is done.

Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agosctp: fix a type cast warnings that causes a_rwnd gets the wrong value
Xin Long [Sat, 28 Oct 2017 11:43:56 +0000 (19:43 +0800)]
sctp: fix a type cast warnings that causes a_rwnd gets the wrong value

These warnings were found by running 'make C=2 M=net/sctp/'.

Commit d4d6fb5787a6 ("sctp: Try not to change a_rwnd when faking a
SACK from SHUTDOWN.") expected to use the peers old rwnd and add
our flight size to the a_rwnd. But with the wrong Endian, it may
not work as well as expected.

So fix it by converting to the right value.

Fixes: d4d6fb5787a6 ("sctp: Try not to change a_rwnd when faking a SACK from SHUTDOWN.")
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agosctp: fix some type cast warnings introduced by transport rhashtable
Xin Long [Sat, 28 Oct 2017 11:43:55 +0000 (19:43 +0800)]
sctp: fix some type cast warnings introduced by transport rhashtable

These warnings were found by running 'make C=2 M=net/sctp/'.

They are introduced by not aware of Endian for the port when
coding transport rhashtable patches.

Fixes: 7fda702f9315 ("sctp: use new rhlist interface on sctp transport rhashtable")
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agosctp: fix some type cast warnings introduced by stream reconf
Xin Long [Sat, 28 Oct 2017 11:43:54 +0000 (19:43 +0800)]
sctp: fix some type cast warnings introduced by stream reconf

These warnings were found by running 'make C=2 M=net/sctp/'.

They are introduced by not aware of Endian when coding stream
reconf patches.

Since commit c0d8bab6ae51 ("sctp: add get and set sockopt for
reconf_enable") enabled stream reconf feature for users, the
Fixes tag below would use it.

Fixes: c0d8bab6ae51 ("sctp: add get and set sockopt for reconf_enable")
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet_sched: avoid matching qdisc with zero handle
Cong Wang [Sat, 28 Oct 2017 05:08:56 +0000 (22:08 -0700)]
net_sched: avoid matching qdisc with zero handle

Davide found the following script triggers a NULL pointer
dereference:

ip l a name eth0 type dummy
tc q a dev eth0 parent :1 handle 1: htb

This is because for a freshly created netdevice noop_qdisc
is attached and when passing 'parent :1', kernel actually
tries to match the major handle which is 0 and noop_qdisc
has handle 0 so is matched by mistake. Commit 69012ae425d7
tries to fix a similar bug but still misses this case.

Handle 0 is not a valid one, should be just skipped. In
fact, kernel uses it as TC_H_UNSPEC.

Fixes: 69012ae425d7 ("net: sched: fix handling of singleton qdiscs with qdisc_hash")
Fixes: 59cc1f61f09c ("net: sched:convert qdisc linked list to hashtable")
Reported-by: Davide Caratti <dcaratti@redhat.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agosctp: reset owner sk for data chunks on out queues when migrating a sock
Xin Long [Fri, 27 Oct 2017 18:13:29 +0000 (02:13 +0800)]
sctp: reset owner sk for data chunks on out queues when migrating a sock

Now when migrating sock to another one in sctp_sock_migrate(), it only
resets owner sk for the data in receive queues, not the chunks on out
queues.

It would cause that data chunks length on the sock is not consistent
with sk sk_wmem_alloc. When closing the sock or freeing these chunks,
the old sk would never be freed, and the new sock may crash due to
the overflow sk_wmem_alloc.

syzbot found this issue with this series:

  r0 = socket$inet_sctp()
  sendto$inet(r0)
  listen(r0)
  accept4(r0)
  close(r0)

Although listen() should have returned error when one TCP-style socket
is in connecting (I may fix this one in another patch), it could also
be reproduced by peeling off an assoc.

This issue is there since very beginning.

This patch is to reset owner sk for the chunks on out queues so that
sk sk_wmem_alloc has correct value after accept one sock or peeloff
an assoc to one sock.

Note that when resetting owner sk for chunks on outqueue, it has to
sctp_clear_owner_w/skb_orphan chunks before changing assoc->base.sk
first and then sctp_set_owner_w them after changing assoc->base.sk,
due to that sctp_wfree and it's callees are using assoc->base.sk.

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agoMerge branch 'sockmap-fixes'
David S. Miller [Sun, 29 Oct 2017 02:18:49 +0000 (11:18 +0900)]
Merge branch 'sockmap-fixes'

John Fastabend says:

====================
net: sockmap fixes

Last two fixes (as far as I know) for sockmap code this round.

First, we are using the qdisc cb structure when making the data end
calculation. This is really just wrong so, store it with the other
metadata in the correct tcp_skb_cb sturct to avoid breaking things.

Next, with recent work to attach multiple programs to a cgroup a
specific enumeration of return codes was agreed upon. However,
I wrote the sk_skb program types before seeing this work and used
a different convention. Patch 2 in the series aligns the return
codes to avoid breaking with this infrastructure and also aligns
with other programming conventions to avoid being the odd duck out
forcing programs to remember SK_SKB programs are different. Pusing
to net because its a user visible change. With this SK_SKB program
return codes are the same as other cgroup program types.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agobpf: rename sk_actions to align with bpf infrastructure
John Fastabend [Fri, 27 Oct 2017 16:45:53 +0000 (09:45 -0700)]
bpf: rename sk_actions to align with bpf infrastructure

Recent additions to support multiple programs in cgroups impose
a strict requirement, "all yes is yes, any no is no". To enforce
this the infrastructure requires the 'no' return code, SK_DROP in
this case, to be 0.

To apply these rules to SK_SKB program types the sk_actions return
codes need to be adjusted.

This fix adds SK_PASS and makes 'SK_DROP = 0'. Finally, remove
SK_ABORTED to remove any chance that the API may allow aborted
program flows to be passed up the stack. This would be incorrect
behavior and allow programs to break existing policies.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agobpf: bpf_compute_data uses incorrect cb structure
John Fastabend [Fri, 27 Oct 2017 16:45:34 +0000 (09:45 -0700)]
bpf: bpf_compute_data uses incorrect cb structure

SK_SKB program types use bpf_compute_data to store the end of the
packet data. However, bpf_compute_data assumes the cb is stored in the
qdisc layer format. But, for SK_SKB this is the wrong layer of the
stack for this type.

It happens to work (sort of!) because in most cases nothing happens
to be overwritten today. This is very fragile and error prone.
Fortunately, we have another hole in tcp_skb_cb we can use so lets
put the data_end value there.

Note, SK_SKB program types do not use data_meta, they are failed by
sk_skb_is_valid_access().

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agoMerge tag 'kbuild-fixes-v4.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 28 Oct 2017 18:01:57 +0000 (11:01 -0700)]
Merge tag 'kbuild-fixes-v4.14-2' of git://git./linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - fix O= building on dash

 - remove unused dependency in Makefile

 - fix default of a choice in Kconfig

 - fix typos and documentation style

 - fix command options unrecognized by sparse

* tag 'kbuild-fixes-v4.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: clang: fix build failures with sparse check
  kbuild doc: a bundle of fixes on makefiles.txt
  Makefile: kselftest: fix grammar typo
  kbuild: Fix optimization level choice default
  kbuild: drop unused symverfile in Makefile.modpost
  kbuild: revert $(realpath ...) to $(shell cd ... && /bin/pwd)

6 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Sat, 28 Oct 2017 17:56:13 +0000 (10:56 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

Pull input fixes from Dmitry Torokhov:

 - fix gtco tablet driver, tightening parsing of HID descriptors

 - add ACPI ID added to Elan driver to be able to handle touchpads found
   in Lenovo Ideapad 320/520

 - fix the Symaptics RMI4 driver to adjust handling of buttons

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: synaptics-rmi4 - limit the range of what GPIOs are buttons
  Input: gtco - fix potential out-of-bound access
  Input: elan_i2c - add ELAN0611 to the ACPI table

6 years agoMerge tag 'pci-v4.14-fixes-6' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaa...
Linus Torvalds [Sat, 28 Oct 2017 17:53:24 +0000 (10:53 -0700)]
Merge tag 'pci-v4.14-fixes-6' of git://git./linux/kernel/git/helgaas/pci

Pull PCI fix from Bjorn Helgaas:
 "Move alpha PCI IRQ map/swizzle functions out of initdata to fix
  regression from PCI core IRQ mapping changes (Lorenzo Pieralisi)"

* tag 'pci-v4.14-fixes-6' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  alpha/PCI: Move pci_map_irq()/pci_swizzle() out of initdata

6 years agoMerge tag 'drm-fixes-for-v4.14-rc7' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Sat, 28 Oct 2017 17:50:38 +0000 (10:50 -0700)]
Merge tag 'drm-fixes-for-v4.14-rc7' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "Two amd fixes, one i915 core and a few i915 GVT fixes, things seem
  fairly quiet"

* tag 'drm-fixes-for-v4.14-rc7' of git://people.freedesktop.org/~airlied/linux:
  drm/i915/gvt: Adding ACTHD mmio read handler
  drm/i915/gvt: Extract mmio_read_from_hw() common function
  drm/i915/gvt: Refine MMIO_RING_F()
  drm/i915/gvt: properly check per_ctx bb valid state
  drm/i915/perf: fix perf enable/disable ioctls with 32bits userspace
  drm/amd/amdgpu: Remove workaround check for UVD6 on APUs
  drm/amd/powerplay: fix uninitialized variable

6 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sat, 28 Oct 2017 17:46:20 +0000 (10:46 -0700)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Six fixes for mostly minor issues, most of which have small race
  windows for occurring"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: Suppress a kernel warning in case the prep function returns BLKPREP_DEFER
  scsi: sg: Re-fix off by one in sg_fill_request_table()
  scsi: aacraid: Fix controller initialization failure
  scsi: hpsa: Fix configured_logical_drive_count·check
  scsi: qla2xxx: Initialize Work element before requesting IRQs
  scsi: zfcp: fix erp_action use-before-initialize in REC action trace

6 years agoassoc_array: Fix a buggy node-splitting case
David Howells [Wed, 11 Oct 2017 22:32:27 +0000 (23:32 +0100)]
assoc_array: Fix a buggy node-splitting case

This fixes CVE-2017-12193.

Fix a case in the assoc_array implementation in which a new leaf is
added that needs to go into a node that happens to be full, where the
existing leaves in that node cluster together at that level to the
exclusion of new leaf.

What needs to happen is that the existing leaves get moved out to a new
node, N1, at level + 1 and the existing node needs replacing with one,
N0, that has pointers to the new leaf and to N1.

The code that tries to do this gets this wrong in two ways:

 (1) The pointer that should've pointed from N0 to N1 is set to point
     recursively to N0 instead.

 (2) The backpointer from N0 needs to be set correctly in the case N0 is
     either the root node or reached through a shortcut.

Fix this by removing this path and using the split_node path instead,
which achieves the same end, but in a more general way (thanks to Eric
Biggers for spotting the redundancy).

The problem manifests itself as:

  BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
  IP: assoc_array_apply_edit+0x59/0xe5

Fixes: 3cb989501c26 ("Add a generic associative array implementation.")
Reported-and-tested-by: WU Fan <u3536072@connect.hku.hk>
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: stable@vger.kernel.org [v3.13-rc1+]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
6 years agoMerge tag '4.14-smb3-fixes-for-stable' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Sat, 28 Oct 2017 15:39:35 +0000 (08:39 -0700)]
Merge tag '4.14-smb3-fixes-for-stable' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "Various SMB3 fixes for 4.14 and stable"

* tag '4.14-smb3-fixes-for-stable' of git://git.samba.org/sfrench/cifs-2.6:
  SMB3: Validate negotiate request must always be signed
  SMB: fix validate negotiate info uninitialised memory use
  SMB: fix leak of validate negotiate info response buffer
  CIFS: Fix NULL pointer deref on SMB2_tcon() failure
  CIFS: do not send invalid input buffer on QUERY_INFO requests
  cifs: Select all required crypto modules
  CIFS: SMBD: Fix the definition for SMB2_CHANNEL_RDMA_V1_INVALIDATE
  cifs: handle large EA requests more gracefully in smb2+
  Fix encryption labels and lengths for SMB3.1.1

6 years agoMerge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszer...
Linus Torvalds [Sat, 28 Oct 2017 15:29:29 +0000 (08:29 -0700)]
Merge branch 'overlayfs-linus' of git://git./linux/kernel/git/mszeredi/vfs

Pull overlayfs fixes from Miklos Szeredi:
 "Fix several issues, most of them introduced in the last release"

* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
  ovl: do not cleanup unsupported index entries
  ovl: handle ENOENT on index lookup
  ovl: fix EIO from lookup of non-indexed upper
  ovl: Return -ENOMEM if an allocation fails ovl_lookup()
  ovl: add NULL check in ovl_alloc_inode

6 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi...
Linus Torvalds [Sat, 28 Oct 2017 15:27:46 +0000 (08:27 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mszeredi/fuse

Pull fuse fix from Miklos Szeredi:
 "This fixes a longstanding bug, which can be triggered by interrupting
  a directory reading syscall"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  fuse: fix READDIRPLUS skipping an entry

6 years agotap: reference to KVA of an unloaded module causes kernel panic
Girish Moodalbail [Fri, 27 Oct 2017 07:00:16 +0000 (00:00 -0700)]
tap: reference to KVA of an unloaded module causes kernel panic

The commit 9a393b5d5988 ("tap: tap as an independent module") created a
separate tap module that implements tap functionality and exports
interfaces that will be used by macvtap and ipvtap modules to create
create respective tap devices.

However, that patch introduced a regression wherein the modules macvtap
and ipvtap can be removed (through modprobe -r) while there are
applications using the respective /dev/tapX devices. These applications
cause kernel to hold reference to /dev/tapX through 'struct cdev
macvtap_cdev' and 'struct cdev ipvtap_dev' defined in macvtap and ipvtap
modules respectively. So,  when the application is later closed the
kernel panics because we are referencing KVA that is present in the
unloaded modules.

----------8<------- Example ----------8<----------
$ sudo ip li add name mv0 link enp7s0 type macvtap
$ sudo ip li show mv0 |grep mv0| awk -e '{print $1 $2}'
  14:mv0@enp7s0:
$ cat /dev/tap14 &
$ lsmod |egrep -i 'tap|vlan'
macvtap                16384  0
macvlan                24576  1 macvtap
tap                    24576  3 macvtap
$ sudo modprobe -r macvtap
$ fg
cat /dev/tap14
^C

<...system panics...>
BUG: unable to handle kernel paging request at ffffffffa038c500
IP: cdev_put+0xf/0x30
----------8<-----------------8<----------

The fix is to set cdev.owner to the module that creates the tap device
(either macvtap or ipvtap). With this set, the operations (in
fs/char_dev.c) on char device holds and releases the module through
cdev_get() and cdev_put() and will not allow the module to unload
prematurely.

Fixes: 9a393b5d5988ea4e (tap: tap as an independent module)
Signed-off-by: Girish Moodalbail <girish.moodalbail@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agotcp: refresh tp timestamp before tcp_mtu_probe()
Eric Dumazet [Fri, 27 Oct 2017 04:21:40 +0000 (21:21 -0700)]
tcp: refresh tp timestamp before tcp_mtu_probe()

In the unlikely event tcp_mtu_probe() is sending a packet, we
want tp->tcp_mstamp being as accurate as possible.

This means we need to call tcp_mstamp_refresh() a bit earlier in
tcp_write_xmit().

Fixes: 385e20706fac ("tcp: use tp->tcp_mstamp in output path")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agotuntap: properly align skb->head before building skb
Jason Wang [Fri, 27 Oct 2017 03:05:44 +0000 (11:05 +0800)]
tuntap: properly align skb->head before building skb

An unaligned alloc_frag->offset caused by previous allocation will
result an unaligned skb->head. This will lead unaligned
skb_shared_info and then unaligned dataref which requires to be
aligned for accessing on some architecture. Fix this by aligning
alloc_frag->offset before the frag refilling.

Fixes: 0bbd7dad34f8 ("tun: make tun_build_skb() thread safe")
Cc: Eric Dumazet <edumazet@google.com>
Cc: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Cc: Wei Wei <dotweiba@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Reported-by: Wei Wei <dotweiba@gmail.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>