platform/kernel/linux-starfive.git
10 years agostaging: dgap: Merge dgap_sysfs.c into dgap_driver.c
Mark Hounschell [Wed, 19 Feb 2014 18:12:01 +0000 (13:12 -0500)]
staging: dgap: Merge dgap_sysfs.c into dgap_driver.c

There is a lot of cleanup work to do on these digi drivers and merging as
much as is possible will make it easier. I also notice that many merged
drivers are single source and header.

Signed-off-by: Mark Hounschell <markh@compro.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agostaging: dgap: Merge dgap_fep5.c into dgap_driver.c
Mark Hounschell [Wed, 19 Feb 2014 18:12:00 +0000 (13:12 -0500)]
staging: dgap: Merge dgap_fep5.c into dgap_driver.c

There is a lot of cleanup work to do on these digi drivers and merging as
much as is possible will make it easier. I also notice that many merged
drivers are single source and header.

Signed-off-by: Mark Hounschell <markh@compro.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agostaging: dgap: Merge dgap_tty.c into dgap_driver.c
Mark Hounschell [Wed, 19 Feb 2014 18:11:59 +0000 (13:11 -0500)]
staging: dgap: Merge dgap_tty.c into dgap_driver.c

There is a lot of cleanup work to do on these digi drivers and merging as
much as is possible will make it easier. I also notice that many merged
drivers are single source and header.

Signed-off-by: Mark Hounschell <markh@compro.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agostaging: dgap: Remove userland source code files
Mark Hounschell [Wed, 19 Feb 2014 18:11:58 +0000 (13:11 -0500)]
staging: dgap: Remove userland source code files

This patch removes userland source code files downld.c and dgap_downld.h

Signed-off-by: Mark Hounschell <markh@compro.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agostaging: dgap: Remove CVS ID tags
Mark Hounschell [Wed, 19 Feb 2014 18:11:57 +0000 (13:11 -0500)]
staging: dgap: Remove CVS ID tags

This patch removes all the original CVS tags because they are in my way

Signed-off-by: Mark Hounschell <markh@compro.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agostaging: binder: Improve Kconfig entry for ANDROID_BINDER_IPC_32BIT
John Stultz [Fri, 21 Feb 2014 22:40:27 +0000 (14:40 -0800)]
staging: binder: Improve Kconfig entry for ANDROID_BINDER_IPC_32BIT

Add a more clear explanation of the option in the prompt, and
make the config depend on ANDROID_BINDER_IPC being selected.

Also sets the default to y, which matches AOSP.

Cc: Colin Cross <ccross@android.com>
Cc: Arve Hjønnevåg <arve@android.com>
Cc: Serban Constantinescu <serban.constantinescu@arm.com>
Cc: Android Kernel Team <kernel-team@android.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agostaging: binder: Support concurrent 32 bit and 64 bit processes.
Arve Hjønnevåg [Fri, 21 Feb 2014 22:40:26 +0000 (14:40 -0800)]
staging: binder: Support concurrent 32 bit and 64 bit processes.

For 64bit systems we want to use the same binder interface for 32bit and
64bit processes. Thus the size and the layout of the structures passed
between the kernel and the userspace has to be the same for both 32 and
64bit processes.

This change replaces all the uses of void* and size_t with
binder_uintptr_t and binder_size_t. These are then typedefed to specific
sizes depending on the use of the interface, as follows:
       * __u32 - on legacy 32bit only userspace
       * __u64 - on mixed 32/64bit userspace where all processes use the same
interface.

This change also increments the BINDER_CURRENT_PROTOCOL_VERSION to 8 and
hooks the compat_ioctl entry for the mixed 32/64bit Android userspace.

This patch also provides a CONFIG_ANDROID_BINDER_IPC_32BIT option for
compatability, which if set which enables the old protocol, setting
BINDER_CURRENT_PROTOCOL_VERSION to 7, on 32 bit systems.

Please note that all 64bit kernels will use the 64bit Binder ABI.

Cc: Colin Cross <ccross@android.com>
Cc: Arve Hjønnevåg <arve@android.com>
Cc: Serban Constantinescu <serban.constantinescu@arm.com>
Cc: Android Kernel Team <kernel-team@android.com>
Signed-off-by: Arve Hjønnevåg <arve@android.com>
[jstultz: Merged with upstream type changes. Various whitespace fixes
and longer Kconfig description for checkpatch. Included improved commit
message from Serban (with a few tweaks).]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agostaging: binder: Fix ABI for 64bit Android
Serban Constantinescu [Fri, 21 Feb 2014 22:40:25 +0000 (14:40 -0800)]
staging: binder: Fix ABI for 64bit Android

BC_REQUEST_DEATH_NOTIFICATION and BC_CLEAR_DEATH_NOTIFICATION were
defined with the wrong structure that did not match the code. Since a
binder pointer and handle are the same size on 32 bit systems, this
change does not affect them. The two commands claimed they were using
struct binder_ptr_cookie but they are using a 32bit handle and a pointer.

The main purpose of this patch is to add the binder_handle_cookie
struct so the service manager does not have to define its own version
(libbinder writes one field at a time so it does not use the struct).

On 32bit systems the payload size is the same as the size of struct
binder_ptr_cookie. On 64bit systems, the size does differ, and the
ioctl number does change. However, there are no known 64bit users of
this interface, and any 64bit systems will need the following patch to
run 32 bit processes anyway, so it is not expected that anyone will
ship a 64bit system without this change, so this change should not
affect any existing systems.

Cc: Colin Cross <ccross@android.com>
Cc: Arve Hjønnevåg <arve@android.com>
Cc: Serban Constantinescu <serban.constantinescu@arm.com>
Cc: Android Kernel Team <kernel-team@android.com>
Signed-off-by: Serban Constantinescu <serban.constantinescu@arm.com>
[jstultz: Few 80+ col fixes for checkpatch, improved commit message
with help from Serban, and included rational from Arve's email]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoMerge branch 'imx-drm-staging' of git://ftp.arm.linux.org.uk/~rmk/linux-arm into...
Greg Kroah-Hartman [Mon, 24 Feb 2014 20:39:56 +0000 (12:39 -0800)]
Merge branch 'imx-drm-staging' of git://ftp.arm.linux.org.uk/~rmk/linux-arm into staging-next

Russell writes:

These changes, which convert imx-drm to use the recently merged
component infrastructure, have been reviewed and acked by Philipp Zabel,
Shawn Guo and Fabio Estevam, and are now deemed to be ready.

10 years agoMerge 3.14-rc4 into staging-next.
Greg Kroah-Hartman [Mon, 24 Feb 2014 20:33:52 +0000 (12:33 -0800)]
Merge 3.14-rc4 into staging-next.

We want those fixes here as well.

10 years agoimx-drm: imx-hdmi: add hotplug support to HDMI component
Russell King [Sun, 3 Nov 2013 22:23:24 +0000 (22:23 +0000)]
imx-drm: imx-hdmi: add hotplug support to HDMI component

Add hotplug support.  We have to make the interrupt handler threaded so
we can call drm_helper_hpd_irq_event().  Keeping in mind that we will
want to share the interrupt with other HDMI interface drivers (eg, audio
and CEC) put the groundwork in now for that, rather than just using
IRQF_ONESHOT.

Also, we must not call drm_helper_hpd_irq_event() until we have fully
setup the connector; keep the interrupt(s) muted until after that point.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: imx-drm-core: add core hotplug connector support
Russell King [Sun, 3 Nov 2013 22:18:40 +0000 (22:18 +0000)]
imx-drm: imx-drm-core: add core hotplug connector support

Add core imx-drm support for hotplug connector support.  We need to
setup the poll helper after we've setup the connectors; the helper
scans the connectors to determine their capabilities.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: imx-drm-core: various cleanups
Russell King [Sun, 3 Nov 2013 15:38:09 +0000 (15:38 +0000)]
imx-drm: imx-drm-core: various cleanups

Various cleanups are possible after the previous round of changes; these
have no real functional bearing other than tidying up the code.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: imx-drm-core: move allocation of imxdrm device to driver load function
Russell King [Sun, 3 Nov 2013 15:31:22 +0000 (15:31 +0000)]
imx-drm: imx-drm-core: move allocation of imxdrm device to driver load function

It is now no longer necessary to keep this structure around; we can
allocate it upon DRM driver load and destroy it thereafter without
affecting the other components now.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: imx-drm-core: kill off mutex
Russell King [Sun, 3 Nov 2013 15:20:18 +0000 (15:20 +0000)]
imx-drm: imx-drm-core: kill off mutex

This mutex doesn't protect anything anymore; get rid of it.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: imx-drm-core: get rid of drm_mode_group_init_legacy_group()
Russell King [Mon, 11 Nov 2013 16:20:25 +0000 (16:20 +0000)]
imx-drm: imx-drm-core: get rid of drm_mode_group_init_legacy_group()

Since we're now operating like a conventional DRM driver, doing all
the initialisation within the driver's ->load callback, we don't
need to mess around with the mode groups - we can rely on the one
in the DRM platform code.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: imx-drm-core: remove imx_drm_connector and imx_drm_encoder code
Russell King [Sun, 3 Nov 2013 13:55:34 +0000 (13:55 +0000)]
imx-drm: imx-drm-core: remove imx_drm_connector and imx_drm_encoder code

The core imx_drm_connector and imx_drm_encoder code is no longer
required - the connectors and encoders are all using the component
support, so we can remove this.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: initialise drm components directly
Russell King [Sun, 3 Nov 2013 13:30:48 +0000 (13:30 +0000)]
imx-drm: initialise drm components directly

Now that our bind function is only ever called during the main DRM
driver ->load callback, we don't need to have the imx_drm_connector or
imx_drm_encoder abstractions anymore.  So let's get rid of it, and move
the DRM connector and encoder setup into the connector support files.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: imx-drm-core: provide common connector and encoder cleanup functions
Russell King [Sun, 3 Nov 2013 13:28:24 +0000 (13:28 +0000)]
imx-drm: imx-drm-core: provide common connector and encoder cleanup functions

Provide two helper functions to assist with cleaning up imx-drm
connectors and encoders.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: imx-drm-core: provide helper function to parse possible crtcs
Russell King [Sun, 3 Nov 2013 14:04:47 +0000 (14:04 +0000)]
imx-drm: imx-drm-core: provide helper function to parse possible crtcs

Provide a helper function to parse possible crtcs before the encoder
is registered.  The crtc mask is derived from the position of the
CRTCs registered in the drm_device.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: use supplied drm_device where possible
Russell King [Sun, 3 Nov 2013 12:26:23 +0000 (12:26 +0000)]
imx-drm: use supplied drm_device where possible

The component helper provides us the drm_device which is being
registered.  Rather than having to reference a global in imx-drm-core,
use this to get the imxdrm device, and also use it to register the CRTC
against.

This means we never have CRTCs/encoders/connectors without the drivers
private data being accessible.

Remove the module owner field as well; this provides no protection
against the device being unbound.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: remove imx-fb.c
Russell King [Sun, 3 Nov 2013 16:04:48 +0000 (16:04 +0000)]
imx-drm: remove imx-fb.c

imx-fb.c doesn't need to be separate from imx-drm-core.c - all it is
doing is setting up the minimum and maximum sizes of the scanout
buffers, and setting up the mode_config function pointers.  Move the
contents into imx-drm-core.c and kill this file.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: remove separate imx-fbdev
Russell King [Sun, 3 Nov 2013 12:13:47 +0000 (12:13 +0000)]
imx-drm: remove separate imx-fbdev

Now that we know when the components of the imx-drm subsystem will be
initialised, we can move the fbdev helper initialisation and teardown
into imx-drm-core.  This gives us the required ordering that DRM wants
in both driver load and unload methods.

We can also stop exporting the imx_drm_device_get() and
imx_drm_device_put() methods; nothing but the fbdev helper was making
use of these.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: delay publishing sysfs connector entries
Russell King [Sun, 3 Nov 2013 18:39:29 +0000 (18:39 +0000)]
imx-drm: delay publishing sysfs connector entries

Delay publishing sysfs connector entries until all components have
initialised.  This reduces the probability of generating false hotplug
events when we're uncertain whether the driver can fully initialise.
This also pulls that code out of the individual imx-drm connector
drivers.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: convert to componentised device support
Russell King [Sun, 3 Nov 2013 11:23:34 +0000 (11:23 +0000)]
imx-drm: convert to componentised device support

Use the componentised device support for imx-drm.  This requires all
the sub-components and the master device to register with the component
device support.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: simplify setup of panel format
Russell King [Sun, 3 Nov 2013 15:52:16 +0000 (15:52 +0000)]
imx-drm: simplify setup of panel format

The encoder format passed into imx_drm_crtc_panel_format*() is the
encoder format used for DRM in most cases; the HDMI encoder sets
this to none, but this is incorrect, it should be TMDS.

Since this is the case, we can pass the drm_encoder structure
directly into this function and use the supplied fields there to
configure the CRTC.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: provide common connector mode validation function
Russell King [Sat, 9 Nov 2013 11:20:55 +0000 (11:20 +0000)]
imx-drm: provide common connector mode validation function

Provide a common connector mode validation function, which can be used
to limit the available modes according to other components in the
system.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: imx-drm-core: use array instead of list for CRTCs
Russell King [Sun, 24 Nov 2013 13:23:17 +0000 (13:23 +0000)]
imx-drm: imx-drm-core: use array instead of list for CRTCs

The DRM core indexes vblank by number, so there's little point
maintaining a list, and have to scan the list to find the appropriate
structure.  Instead, use an array of pointers to the CRTCs.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: imx-drm-core: sanitise imx_drm_encoder_get_mux_id()
Russell King [Sun, 24 Nov 2013 13:02:52 +0000 (13:02 +0000)]
imx-drm: imx-drm-core: sanitise imx_drm_encoder_get_mux_id()

Address the following issues:
- imx_drm_encoder_get_mux_id() searches the CRTC list for the matching
  CRTC, and returns the position within this list as the MUX programming
  value for encoders.  This is sub-optimal for two reasons:
  1. It relies upon the CRTC list not changing during the lifetime of
     the driver.
  2. It is dependent on the initialisation order of the CRTCs.

  We address (1) in this patch, leaving (2) until a better solution can
  be found, as (2) requires larger changes.

- imx_drm_encoder is unused.  Instead, pass the drm_encoder which is
  slightly more useful; all callers pass encoder->crtc as the required
  crtc, so move this inside the function.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: update and fix imx6 DT descriptions for v3 HDMI driver
Russell King [Wed, 30 Oct 2013 20:10:31 +0000 (20:10 +0000)]
imx-drm: update and fix imx6 DT descriptions for v3 HDMI driver

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: add imx6 DT configuration for HDMI
Russell King [Wed, 16 Oct 2013 09:19:00 +0000 (10:19 +0100)]
imx-drm: add imx6 DT configuration for HDMI

Extracted from another patch by Fabio Estevam, this adds the DT
configuration for HDMI output on the IMX6 SoCs

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: ipu-v3: more clocking fixes
Russell King [Sun, 20 Oct 2013 14:36:35 +0000 (15:36 +0100)]
imx-drm: ipu-v3: more clocking fixes

There's no point in using the clk API for this; we end up having to
violate the layering this provides.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: ipu-v3: don't use clk_round_rate() before clk_set_rate()
Russell King [Sat, 19 Oct 2013 16:38:44 +0000 (17:38 +0100)]
imx-drm: ipu-v3: don't use clk_round_rate() before clk_set_rate()

This is nonsense; clk_round_rate() is just clk_set_rate() without the
side effect of changing the hardware.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: ipu-v3: more inteligent DI clock selection
Russell King [Sat, 19 Oct 2013 14:05:31 +0000 (15:05 +0100)]
imx-drm: ipu-v3: more inteligent DI clock selection

The DI clock selection was very rudimentary: it would statically use
either the IPU internal clock or the DI external clock depending on
which "encoder" was being used.  In the case of HDMI, it would always
use the IPU clock.

Moreover, using the IPU clock resulted in fractional divisors, which
are achieved by skipping clock pulses.  This can result in the HDMI
PHY PLL being frequency modulated, and the attached device is then
unable to properly lock on to the TMDS clock.

We need at least 1% accurate and stable clocks for HDMI.

Arrange for the DI clock to be sourced from the IPU internal clock
if it can satisfy our requirements, otherwise switch to the DI
external clock and try and set the external clock to our desired
pixel clock rate.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: imx-hdmi: fix CTS/N setup at init time
Russell King [Thu, 7 Nov 2013 15:35:06 +0000 (15:35 +0000)]
imx-drm: imx-hdmi: fix CTS/N setup at init time

Many of the variables for the audio clock regenerator (CTS/N) were not
initialised in any way.  The pixel rate which was being used also
wasn't being adjusted at all when the display mode is modified.

Get rid of the seaprate 'pixel_clk_rate', and use the stored pixel
clock rate instead.  Pass this desired pixel clock rate into
hdmi_set_clk_regenerator().  Collapse down hdmi_init_clk_regenerator()
since it is a copy of hdmi_set_clk_regenerator(), and pass a default
pixel clock rate.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: imx-hdmi: clean up setting of vp_conf
Russell King [Mon, 4 Nov 2013 12:55:30 +0000 (12:55 +0000)]
imx-drm: imx-hdmi: clean up setting of vp_conf

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: imx-hdmi: provide register modification function
Russell King [Mon, 4 Nov 2013 12:42:02 +0000 (12:42 +0000)]
imx-drm: imx-hdmi: provide register modification function

There are a load of read-modify-write patterns to change bitfields in
various registers in this driver; provide a helper to perform this
manipulation.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: imx-hdmi: clean up setting CSC registers
Russell King [Mon, 4 Nov 2013 12:10:40 +0000 (12:10 +0000)]
imx-drm: imx-hdmi: clean up setting CSC registers

Rather than manually writing each register sequentially, we can use a
loop to reduce the amount of code.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoimx-drm: imx-hdmi: convert HDMI clock settings to tabular form
Russell King [Mon, 4 Nov 2013 11:24:00 +0000 (11:24 +0000)]
imx-drm: imx-hdmi: convert HDMI clock settings to tabular form

Rather than having large if() and switch() statements, provide a table
to look up the register settings for various clock rates.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoLinux 3.14-rc4
Linus Torvalds [Mon, 24 Feb 2014 01:40:03 +0000 (17:40 -0800)]
Linux 3.14-rc4

10 years agoMerge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...
Linus Torvalds [Mon, 24 Feb 2014 01:38:04 +0000 (17:38 -0800)]
Merge tag 'fixes-for-linus' of git://git./linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Olof Johansson:
 "A collection of fixes for ARM platforms.  Most are fixes for DTS
  files, mostly from DT conversion on OMAP which is still finding a few
  issues here and there.

  There's a couple of small stale code removal patches that we usually
  queue for the next release instead, but they seemed harmless enough to
  bring in now.

  Also, a fix for backlight on some PXA platforms, and a cache
  configuration fix for Tegra, etc"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (25 commits)
  MAINTAINERS: add additional ARM BCM281xx/BCM11xxx maintainer
  ARM: tegra: only run PL310 init on systems with one
  ARM: tegra: Add head numbers to display controllers
  ARM: imx6: build pm-imx6q.c independently of CONFIG_PM
  ARM: tegra: fix RTC0 alias for Cardhu
  ARM: dove: dt: revert PMU interrupt controller node
  Documentation: dt: OMAP: Update Overo/Tobi
  ARM: dts: Add support for both OMAP35xx and OMAP36xx Overo/Tobi
  ARM: dts: omap3-tobi: Use the correct vendor prefix
  ARM: dts: omap3-tobi: Fix boot with OMAP36xx-based Overo
  ARM: OMAP2+: Remove legacy macros for zoom platforms
  ARM: OMAP2+: Remove MACH_NOKIA_N800
  ARM: dts: N900: add missing compatible property
  ARM: dts: N9/N950: fix boot hang with 3.14-rc1
  ARM: OMAP1: nokia770: enable tahvo-usb
  ARM: OMAP2+: gpmc: fix: DT ONENAND child nodes not probed when MTD_ONENAND is built as module
  ARM: OMAP2+: gpmc: fix: DT NAND child nodes not probed when MTD_NAND is built as module
  ARM: dts: omap3-gta04: Fix mmc1 properties.
  ARM: dts: omap3-gta04: Fix 'aux' gpio key flags.
  ARM: OMAP2+: add missing ARCH_HAS_OPP
  ...

10 years agoMerge tag 'regulator-v3.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 24 Feb 2014 01:37:25 +0000 (17:37 -0800)]
Merge tag 'regulator-v3.14-rc4' of git://git./linux/kernel/git/broonie/regulator

Pull regulator fixes from Mark Brown:
 "Mostly unexciting driver fixes, plus one fix to lower the severity of
  the log message when we don't use an optional regulator - the fixes
  for ACPI system made this come up more often and it was correctly
  observed that it was causing undue concern for users"

* tag 'regulator-v3.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: max14577: Fix invalid return value on DT parse success
  regulator: core: Change dummy supplies error message to a warning
  regulator: s5m8767: Add missing of_node_put
  regulator: s5m8767: Use of_get_child_by_name
  regulator: da9063: Bug fix when setting max voltage on LDOs 5-11

10 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 23 Feb 2014 22:17:08 +0000 (14:17 -0800)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull timer fix from Thomas Gleixner:
 "Serialize the registration of a new sched_clock in the currently ARM
  only generic sched_clock facilty to avoid sched_clock havoc"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched_clock: Prevent callers from seeing half-updated data

10 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 23 Feb 2014 22:15:46 +0000 (14:15 -0800)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Thomas Gleixner:

 - a bugfix which prevents a divide by 0 panic when the newly introduced
   try_msr_calibrate_tsc() fails

 - enablement of the Baytrail platform to utilize the newfangled msr
   based calibration

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: tsc: Add missing Baytrail frequency to the table
  x86, tsc: Fallback to normal calibration if fast MSR calibration fails

10 years agoMerge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 23 Feb 2014 22:15:08 +0000 (14:15 -0800)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull irq fixes from Thomas Gleixner:
 "Another four fixlets to tame the ARM orion irq chip"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip: orion: Fix getting generic chip pointer.
  irqchip: orion: clear stale interrupts in irq_startup
  irqchip: orion: use handle_edge_irq on bridge irqs
  irqchip: orion: clear bridge cause register on init

10 years agoMerge tag 'usb-3.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Sun, 23 Feb 2014 18:40:22 +0000 (10:40 -0800)]
Merge tag 'usb-3.14-rc4' of git://git./linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here are a number of USB fixes for reported issues for 3.14-rc4

  The majority of these are for USB gadget, phy, and musb driver issues.
  And there's a few new device ids thrown in for good measure"

* tag 'usb-3.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: chipidea: need to mask when writting endptflush and endptprime
  usb: musb: correct use of schedule_delayed_work()
  usb: phy: msm: fix compilation errors when !CONFIG_PM_SLEEP
  usb: gadget: fix NULL pointer dereference
  usb: gadget: printer: using gadget_is_otg to check otg support at runtime
  phy: let phy_provider_register be the last step in registering PHY
  phy-core: Don't allow building phy-core as a module
  phy-core: Don't propagate -ENOSUPP from phy_pm_runtime_get_sync to caller
  phy-core: phy_get: Leave error logging to the caller
  phy,phy-bcm-kona-usb2.c: Add dependency on HAS_IOMEM
  usb: musb: correct use of schedule_delayed_work()
  usb: musb: do not sleep in atomic context
  USB: serial: option: blacklist interface 4 for Cinterion PHS8 and PXS8
  USB: EHCI: add delay during suspend to prevent erroneous wakeups
  usb: gadget: bcm63xx_udc: fix build failure on DMA channel code
  usb: musb: do not sleep in atomic context
  usb: gadget: s3c2410_udc: Fix build error
  usb: musb: core: Fix remote-wakeup resume
  usb: musb: host: Fix SuperSpeed hub enumeration
  usb: musb: fix obex in g_nokia.ko causing kernel panic

10 years agoMerge tag 'tty-3.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Linus Torvalds [Sun, 23 Feb 2014 18:39:50 +0000 (10:39 -0800)]
Merge tag 'tty-3.14-rc4' of git://git./linux/kernel/git/gregkh/tty

Pull TTY revert from Greg KH:
 "Here is a single commit, a revert of a sysfs file change that ended up
  breaking a userspace tool"

* tag 'tty-3.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  Revert "tty: Set correct tty name in 'active' sysfs attribute"

10 years agoMerge tag 'staging-3.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Sun, 23 Feb 2014 18:39:21 +0000 (10:39 -0800)]
Merge tag 'staging-3.14-rc4' of git://git./linux/kernel/git/gregkh/staging

Pull staging tree fix from Greg KH:
 "Here is a single android driver fix for 3.14-rc4 that fixes a reported
  problem in the binder driver"

* tag 'staging-3.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging: binder: Fix death notifications

10 years agoMerge tag 'char-misc-3.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregk...
Linus Torvalds [Sun, 23 Feb 2014 18:38:51 +0000 (10:38 -0800)]
Merge tag 'char-misc-3.14-rc4' of git://git./linux/kernel/git/gregkh/char-misc

Pull char/misc fix from Greg KH:
 "Here is a single commit, to fix a reported problem in the mei driver"

* tag 'char-misc-3.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  mei: set client's read_cb to NULL when flow control fails

10 years agoMerge tag 'iio-for-3.15b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23...
Greg Kroah-Hartman [Sun, 23 Feb 2014 17:08:34 +0000 (09:08 -0800)]
Merge tag 'iio-for-3.15b' of git://git./linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

Second round of IIO new driver, functionality and cleanups for the 3.15 series.

There are a few fixes in here that might, earlier in a cycle, have gone
to Greg as fixes. Given they are either minor or have never actually
been observed as causing trouble (the locking bug in the event code) and
are invasive, I have included them in this pull request, targeting the
3.15 merge window instead.

The rest are pretty uncontroversial new drivers, a handy little tool for
the example code in our documentation and little cleanups.

New drivers
* Freescale Vybrid and i.MX6SLX ADC driver.
* HID Sensor hub proximity sensors.
* HID Sensor hub pressure sensors.
* LPS25H Pressure sensors added to the ST micro pressure sensor driver.

New functionality
* lsiio tool.  This is added to the staging tree as we haven't yet moved
  the example code it sits with out.  Moving this code out is now a reasonably
  high priority but holding up this tool in the meantime did not seem
  worthwhile.
* mag3110 - add missing scale factor for temperature output to userspace.

Cleanups
* Fix a bug in the event reporting in which a spin lock might be held over
  when a sleep occured.  A similar bug was found by Lars in the buffer code.
  It has not to our knowledge been observed as actually occuring and is
  a little too invasive to push out as a fix.
* Drop the IIO_ST macro after clearing out all users.  This macro was a very
  bad idea leading to a number of bugs after it stopped covering all elements
  of the structure being assigned and people started making assumptions about
  what it did cover.  Glad to see it go!
* Avoid applying extended name to shared attributes as it makes no sense.
  No in tree drivers were using the combination, hence not pushed out as
  a fix.
* ad799x - move to devm_request_threaded_irq to reduce boilerplate clean up.
* bma180 - make the low_pass_filter_3db_frequency info element shared rather
  than per attribute.  The old approach was valid but not as clean as it might
  be and was setting a bad example.  Hence the cleanup.
* mxs-lradc - propogate the error code form a platform_get_irq call rather than
  eating it up by returning -EINVAL on all errors.
* ad799x - typo fix in the copyright message. Either that or Michael was
  asserting a copyright that moved backwards in time by about a thousand years.
* ad799x - use a regulator for vref rather than platform data.  The driver
  dates from just as the regulator framework was coming into common use so
  provides an alternative way of specifying the reference voltage.  We no
  longer need that approach so drop it in favour of a regulator only approach.
* max1363 - some internal vref values were out by a small amount.  The effect
  would have been tiny and no one noticed hence not pushing this through as
  a fix.
* core - replace some pointless goto error_ret (with no clean up) lines with
  direct returns.  This is my bad coding style so I'm glad to see it cleaned
  up.
* core - avoid a kasprintf that just directly prints a string with no
  formatting elements.  This has always been there but Lars just noticed it.
  Oops.

10 years agoiio:event: Fix and cleanup locking
Lars-Peter Clausen [Fri, 14 Feb 2014 18:49:00 +0000 (18:49 +0000)]
iio:event: Fix and cleanup locking

The event code currently holds a spinlock with IRQs disabled while calling
kfifo_to_user(). kfifo_to_user() can generate a page fault though, which means
we have to be able to sleep, which is not possible if the interrupts are
disabled. The good thing is that kfifo handles concurrent read and write access
just fine as long as there is only one reader and one writer, so we do not any
locking to protect against concurrent access from the read and writer thread. It
is possible though that userspace is trying to read from the event FIFO from
multiple concurrent threads, so we need to add locking to protect against this.
This is done using a mutex. The mutex will only protect the kfifo_to_user()
call, it will not protect the waitqueue. This means that multiple threads can be
waiting for new data and once a new event is added to the FIFO all waiting
threads will be woken up. If one of those threads is unable to read any data
(because another thread already read all the data) it will go back to sleep. The
only remaining issue is that now that the clearing of the BUSY flag and the
emptying of the FIFO does no longer happen in one atomic step it is possible
that a event is added to the FIFO after it has been emptied and this sample will
be visible the next time a new event file descriptor is created. To avoid this
rather move the emptying of the FIFO from iio_event_chrdev_release to
iio_event_getfd().

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
10 years agoMAINTAINERS: add additional ARM BCM281xx/BCM11xxx maintainer
Matt Porter [Fri, 14 Feb 2014 15:15:03 +0000 (10:15 -0500)]
MAINTAINERS: add additional ARM BCM281xx/BCM11xxx maintainer

Add myself as an additional maintainer for the Broadcom mobile
SoCs.

Signed-off-by: Matt Porter <mporter@linaro.org>
Acked-by: Christian Daudt <bcm@fixthebug.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
10 years agoMerge remote-tracking branches 'regulator/fix/da9063', 'regulator/fix/max14577' and...
Mark Brown [Sun, 23 Feb 2014 03:22:18 +0000 (12:22 +0900)]
Merge remote-tracking branches 'regulator/fix/da9063', 'regulator/fix/max14577' and 'regulator/fix/s5m8767' into regulator-linus

10 years agoMerge remote-tracking branch 'regulator/fix/core' into regulator-linus
Mark Brown [Sun, 23 Feb 2014 03:22:18 +0000 (12:22 +0900)]
Merge remote-tracking branch 'regulator/fix/core' into regulator-linus

10 years agoRevert "tty: Set correct tty name in 'active' sysfs attribute"
Greg Kroah-Hartman [Sat, 22 Feb 2014 22:31:04 +0000 (14:31 -0800)]
Revert "tty: Set correct tty name in 'active' sysfs attribute"

This reverts commit d8a5dc3033af2fd6d16030d2ee4fbd073460fe54.

This breaks plymouth installs, either because plymouth is using the file
"incorrectly" or because the patch is incorrect.  Either way, this needs
to be reverted until it is all figured out.

Reported-by: Josh Boyer <jwboyer@fedoraproject.org>
Reported-by: Ray Strode <halfline@gmail.com>
Cc: Lennart Poettering <lennart@poettering.net>
Cc: Kay Sievers <kay@vrfy.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: David Herrmann <dh.herrmann@gmail.com>
Cc: Werner Fink <werner@suse.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoMerge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 22 Feb 2014 20:12:50 +0000 (12:12 -0800)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull scheduler fixes from Ingo Molnar:
 "Misc fixlets: a fair number of them resulting from the new
  SCHED_DEADLINE code"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/deadline: Remove useless dl_nr_total
  sched/deadline: Test for CPU's presence explicitly
  sched: Add 'flags' argument to sched_{set,get}attr() syscalls
  sched: Fix information leak in sys_sched_getattr()
  sched,numa: add cond_resched to task_numa_work
  sched/core: Make dl_b->lock IRQ safe
  sched/core: Fix sched_rt_global_validate
  sched/deadline: Fix overflow to handle period==0 and deadline!=0
  sched/deadline: Fix bad accounting of nr_running

10 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 22 Feb 2014 20:11:54 +0000 (12:11 -0800)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
 "Misc fixlets from all around the place"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/uncore: Fix IVT/SNB-EP uncore CBOX NID filter table
  perf/x86: Correctly use FEATURE_PDCM
  perf, nmi: Fix unknown NMI warning
  perf trace: Fix ioctl 'request' beautifier build problems on !(i386 || x86_64) arches
  perf trace: Add fallback definition of EFD_SEMAPHORE
  perf list: Fix checking for supported events on older kernels
  perf tools: Handle PERF_RECORD_HEADER_EVENT_TYPE properly
  perf probe: Do not add offset twice to uprobe address
  perf/x86: Fix Userspace RDPMC switch
  perf/x86/intel/p6: Add userspace RDPMC quirk for PPro

10 years agoMerge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck...
Linus Torvalds [Sat, 22 Feb 2014 16:29:25 +0000 (08:29 -0800)]
Merge tag 'hwmon-for-linus' of git://git./linux/kernel/git/groeck/linux-staging

Pull hwmon fix from Guenter Roeck:
 "Fix writing the minimum temperature in max1668 driver"

* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (max1668) Fix writing the minimum temperature

10 years agoMerge branch 'xfs-fixes-for-3.14-rc4' of git://oss.sgi.com/xfs/xfs
Linus Torvalds [Sat, 22 Feb 2014 16:26:01 +0000 (08:26 -0800)]
Merge branch 'xfs-fixes-for-3.14-rc4' of git://oss.sgi.com/xfs/xfs

Pull xfs fixes from Dave Chinner:
 "This is the first pull request I've had to do for you, so I'm still
  sorting things out.  The reason I'm sending this and not Ben should be
  obvious from the first commit below - SGI has stepped down from the
  XFS maintainership role.  As such, I'd like to take another
  opportunity to thank them for their many years of effort maintaining
  XFS and supporting the XFS community that they developed from the
  ground up.

  So I haven't had time to work things like signed tags into my
  workflows yet, so this is just a repo branch I'm asking you to pull
  from.  And yes, I named the branch -rc4 because I wanted the fixes in
  rc4, not because the branch was for merging into -rc3.  Probably not
  right, either.

  Anyway, I should have everything sorted out by the time the next merge
  window comes around.  If there's anything that you don't like in the
  pull req, feel free to flame me unmercifully.

  The changes are fixes for recent regressions and important thinkos in
  verification code:

        - a log vector buffer alignment issue on ia32
        - timestamps on truncate got mangled
        - primary superblock CRC validation fixes and error message
          sanitisation"

* 'xfs-fixes-for-3.14-rc4' of git://oss.sgi.com/xfs/xfs:
  xfs: limit superblock corruption errors to actual corruption
  xfs: skip verification on initial "guess" superblock read
  MAINTAINERS: SGI no longer maintaining XFS
  xfs: xfs_sb_read_verify() doesn't flag bad crcs on primary sb
  xfs: ensure correct log item buffer alignment
  xfs: ensure correct timestamp updates from truncate

10 years agoMerge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git...
Ingo Molnar [Sat, 22 Feb 2014 16:20:46 +0000 (17:20 +0100)]
Merge tag 'perf-urgent-for-mingo' of git://git./linux/kernel/git/acme/linux into perf/urgent

Pull perf/urgent fixes from Arnaldo Carvalho de Melo:

  * Handle PERF_RECORD_HEADER_EVENT_TYPE properly. (Jiri Olsa)

  * Fix checking for supported events on older kernels in
    'perf list' (Vince Weaver)

  * Do not add offset twice to uprobe address in
    'perf probe' (Masami Hiramatsu)

  * Fix perf trace's ioctl 'request' beautifier build problems
    on !(i386 || x86_64) arches (Arnaldo Carvalho de Melo)

  * Fix 'perf trace' build by adding a fallback definition for
    EFD_SEMAPHORE (Ben Hutchings)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
10 years agoiio:pressure: Add support for LPS25H pressure sensor
Denis CIOCCA [Thu, 20 Feb 2014 17:49:00 +0000 (17:49 +0000)]
iio:pressure: Add support for LPS25H pressure sensor

This patch adds support for the new barometer sensor: LPS25H.

Signed-off-by: Denis Ciocca <denis.ciocca@st.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
10 years agoiio: hid-sensors: Added Pressure Sensor driver
Archana Patni [Thu, 20 Feb 2014 06:30:00 +0000 (06:30 +0000)]
iio: hid-sensors: Added Pressure Sensor driver

Added usage id processing for Pressure Sensor. This uses IIO
interfaces for triggered buffer to present data to user
mode. This uses HID sensor framework for registering callback
events from the sensor hub.

Signed-off-by: Archana Patni <archana.patni@intel.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
10 years agoiio: hid-sensors: Added Proximity Sensor Driver
Archana Patni [Thu, 20 Feb 2014 06:29:00 +0000 (06:29 +0000)]
iio: hid-sensors: Added Proximity Sensor Driver

Added usage id processing for Proximity (Human Presence).
This uses IIO interfaces for triggered buffer to present data
to user mode. This uses HID sensor framework for registering
callback events from the sensor hub.

Signed-off-by: Archana Patni <archana.patni@intel.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
10 years agoregulator: max14577: Fix invalid return value on DT parse success
Krzysztof Kozlowski [Fri, 21 Feb 2014 12:12:38 +0000 (13:12 +0100)]
regulator: max14577: Fix invalid return value on DT parse success

This fixes bug introduced in 667a6b7a (regulator: max14577: Add missing
of_node_put). The DTS parsing function returned number of matched
regulators as success status which then was compared against 0 in probe.

Result was a probe fail after successful parsing the DTS:
max14577-regulator: probe of max14577-regulator failed with error 2

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviwed-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoMerge tag 'irqchip-mvebu-fixes-3.14' of git://git.infradead.org/linux-mvebu into...
Thomas Gleixner [Fri, 21 Feb 2014 22:57:33 +0000 (23:57 +0100)]
Merge tag 'irqchip-mvebu-fixes-3.14' of git://git.infradead.org/linux-mvebu into irq/urgent

irqchip mvebu fixes for v3.14

 - orion:
    - fixes for clearing bridge cause register, and clearing stale interrupts

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
10 years agoMerge tag 'dt-for-linus' of git://git.secretlab.ca/git/linux
Linus Torvalds [Fri, 21 Feb 2014 22:35:05 +0000 (14:35 -0800)]
Merge tag 'dt-for-linus' of git://git.secretlab.ca/git/linux

Pull devicetree fixes from Grant Likely:
 "Device tree compatible match order bug fix

  This branch contains a bug fix for the way devicetree code identifies
  the type of device.  Device drivers can contain a list of
  of_device_ids, but it more than one entry will match, then the device
  driver may choose the wrong one.  Commit 105353145e, "match each node
  compatible against all given matches first", was queued for v3.14 but
  ended up causing other bugs.  Commit 06b29e76a7 attempted to fix it
  but it had other bugs.  Merely reverting the fix and waiting until
  v3.15 isn't a good option because there is code in v3.14 that depends
  on the revised behaviour to boot.

  This branch should finally fixes the problem correctly.  This time
  instead of just hoping that the patch is correct, this branch also
  adds new testcases that validate the behaviour.

  The changes in this branch are larger than I would like for a -rc
  pull, but moving the test case data out of out of arch/arm so that it
  could be validated on other architectures was important"

* tag 'dt-for-linus' of git://git.secretlab.ca/git/linux:
  of: Add self test for of_match_node()
  of: Move testcase FDT data into drivers/of
  of: reimplement the matching method for __of_match_node()
  Revert "of: search the best compatible match first in __of_match_node()"

10 years agoMerge git://www.linux-watchdog.org/linux-watchdog
Linus Torvalds [Fri, 21 Feb 2014 22:34:26 +0000 (14:34 -0800)]
Merge git://www.linux-watchdog.org/linux-watchdog

Pull watchdog fix from Wim Van Sebroeck:
 "It corrects the error code when no device was found for w83697hf_wdt"

* git://www.linux-watchdog.org/linux-watchdog:
  watchdog: w83697hf_wdt: return ENODEV if no device was found

10 years agoirqchip: orion: Fix getting generic chip pointer.
Andrew Lunn [Thu, 6 Feb 2014 23:41:58 +0000 (00:41 +0100)]
irqchip: orion: Fix getting generic chip pointer.

Enabling SPARSE_IRQ shows up a bug in the irq-orion bridge interrupt
handler. The bridge interrupt is implemented using a single generic
chip. Thus the parameter passed to irq_get_domain_generic_chip()
should always be zero.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Fixes: 9dbd90f17e4f ("irqchip: Add support for Marvell Orion SoCs")
Cc: <stable@vger.kernel.org> # v3.11+
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
10 years agoperf/x86/uncore: Fix IVT/SNB-EP uncore CBOX NID filter table
Stephane Eranian [Wed, 19 Feb 2014 13:10:18 +0000 (14:10 +0100)]
perf/x86/uncore: Fix IVT/SNB-EP uncore CBOX NID filter table

This patch updates the CBOX PMU filters mapping tables for SNB-EP
and IVT (model 45 and 62 respectively).

The NID umask always comes in addition to another umask.
When set, the NID filter is applied.

The current mapping tables were missing some code/umask
combinations to account for the NID umask. This patch
fixes that.

Cc: mingo@elte.hu
Cc: ak@linux.intel.com
Reviewed-by: Yan, Zheng <zheng.z.yan@intel.com>
Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20140219131018.GA24475@quad
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
10 years agoperf/x86: Correctly use FEATURE_PDCM
Peter Zijlstra [Mon, 3 Feb 2014 13:29:03 +0000 (14:29 +0100)]
perf/x86: Correctly use FEATURE_PDCM

The current code simply assumes Intel Arch PerfMon v2+ to have
the IA32_PERF_CAPABILITIES MSR; the SDM specifies that we should check
CPUID[1].ECX[15] (aka, FEATURE_PDCM) instead.

This was found by KVM which implements v2+ but didn't provide the
capabilities MSR. Change the code to DTRT; KVM will also implement the
MSR and return 0.

Cc: pbonzini@redhat.com
Reported-by: "Michael S. Tsirkin" <mst@redhat.com>
Suggested-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20140203132903.GI8874@twins.programming.kicks-ass.net
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
10 years agoperf, nmi: Fix unknown NMI warning
Markus Metzger [Sat, 15 Feb 2014 00:44:08 +0000 (16:44 -0800)]
perf, nmi: Fix unknown NMI warning

When using BTS on Core i7-4*, I get the below kernel warning.

$ perf record -c 1 -e branches:u ls
Message from syslogd@labpc1501 at Nov 11 15:49:25 ...
 kernel:[  438.317893] Uhhuh. NMI received for unknown reason 31 on CPU 2.

Message from syslogd@labpc1501 at Nov 11 15:49:25 ...
 kernel:[  438.317920] Do you have a strange power saving mode enabled?

Message from syslogd@labpc1501 at Nov 11 15:49:25 ...
 kernel:[  438.317945] Dazed and confused, but trying to continue

Make intel_pmu_handle_irq() take the full exit path when returning early.

Cc: eranian@google.com
Cc: peterz@infradead.org
Cc: mingo@kernel.org
Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1392425048-5309-1-git-send-email-andi@firstfloor.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
10 years agostaging: comedi: pcl816: tidy up pcl818_check()
H Hartley Sweeten [Wed, 19 Feb 2014 17:11:31 +0000 (10:11 -0700)]
staging: comedi: pcl816: tidy up pcl818_check()

This function probes a number of the boards registers during the
(*attach) to verify that it is actually a PCL-816 compatible board.
For aesthetics, move the function closer to the (*attach).

To better match the pcl818 driver, allocate the private data before
calling pcl816_check().

Refactor the function to return an errno if fails. Change the errno
from -EIO to -ENODEV and remove the unnecessary dev_err() noise.

Make sure the CONTROL register is reset to a known state after the
check. The 0x18 value actually defines an invalid interrupt selection
and sets an undefined bit.

Add a couple comments to clarify the magic values.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agostaging: comedi: pcl816: remove unnecessary function separation comments
H Hartley Sweeten [Wed, 19 Feb 2014 17:11:30 +0000 (10:11 -0700)]
staging: comedi: pcl816: remove unnecessary function separation comments

These comments are just added cruft. Remove them.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agostaging: comedi: pcl816: remove unnecessary 'dev->irq' check
H Hartley Sweeten [Wed, 19 Feb 2014 17:11:29 +0000 (10:11 -0700)]
staging: comedi: pcl816: remove unnecessary 'dev->irq' check

If the dev->irq is not valid the interrupt function will not be hooked
up during the attach. Remove the unnecessary check.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agostaging: comedi: pcl816: rename 'irq_blocked' in private data
H Hartley Sweeten [Wed, 19 Feb 2014 17:11:28 +0000 (10:11 -0700)]
staging: comedi: pcl816: rename 'irq_blocked' in private data

This member in the private data is a flag that indicates that an analog
input async command is currently running. Rename it to make this clear.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agostaging: comedi: pcl816: kzalloc'ed memory does not need to be cleared
H Hartley Sweeten [Wed, 19 Feb 2014 17:11:27 +0000 (10:11 -0700)]
staging: comedi: pcl816: kzalloc'ed memory does not need to be cleared

The private data is kzalloc'ed in the (*attach). There is no need to
initialize any of the members to 0.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agostaging: comedi: pcl816: convert private data flags to bit-fields
H Hartley Sweeten [Wed, 19 Feb 2014 17:11:26 +0000 (10:11 -0700)]
staging: comedi: pcl816: convert private data flags to bit-fields

The 'irq_was_now_closed' member is actually a flag, devpriv->int816_mode
will always be > 0 when it's used to set irq_was_now_closed in the cancel
function.

Convert the flags in the private data to bit-fields to save a bit of
space.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agostaging: comedi: pcl816: remove 'ai_act_chanlist_{len, pos}' from private data
H Hartley Sweeten [Wed, 19 Feb 2014 17:11:25 +0000 (10:11 -0700)]
staging: comedi: pcl816: remove 'ai_act_chanlist_{len, pos}' from private data

These members of the private data don't do anything usefull. Just remove them.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agostaging: comedi: pcl816: use subdevice (*cancel)
H Hartley Sweeten [Wed, 19 Feb 2014 17:11:24 +0000 (10:11 -0700)]
staging: comedi: pcl816: use subdevice (*cancel)

Use the subdevice (*cancel) operation to remove the need for a forward
declaration.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agostaging: comedi: pcl816: don't calc the timer divisors twice
H Hartley Sweeten [Wed, 19 Feb 2014 17:11:23 +0000 (10:11 -0700)]
staging: comedi: pcl816: don't calc the timer divisors twice

The timer divisors are calculated in the (*do_cmdtest) before the (*do_cmd)
is called by the comedi core. The extra sanity checks in the (*do_cmd) are
not necessary, the values returned from i8253_cascade_ns_to_timer() will be
greater than 1. Save the values in the private data so they don't need to be
recalced.

Refactor pcl816_start_pacer() to use the values from the private data.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agostaging: comedi: pcl816: clarify irq request in pcl816_attach()
H Hartley Sweeten [Wed, 19 Feb 2014 17:11:22 +0000 (10:11 -0700)]
staging: comedi: pcl816: clarify irq request in pcl816_attach()

All the board types can use IRQ 2-7 for async command support. Remove
the 'IRQbits', which is a mask of the valid IRQs, from the boardinfo
and refactor pcl816_attach().

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agostaging: comedi: pcl816: remove 'n_aochan' from boardinfo
H Hartley Sweeten [Wed, 19 Feb 2014 17:11:21 +0000 (10:11 -0700)]
staging: comedi: pcl816: remove 'n_aochan' from boardinfo

This member of the boardinfo is the same for all board types. Remove this
data from the boardinfo.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agostaging: comedi: pcl816: remove 'ai_ns_min' from boardinfo
H Hartley Sweeten [Wed, 19 Feb 2014 17:11:20 +0000 (10:11 -0700)]
staging: comedi: pcl816: remove 'ai_ns_min' from boardinfo

This member of the boardinfo is the same for all board types. Remove this
data from the boardinfo.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoStaging: comedi: addi-data: don't initialize a static variable to 0
Chase Southwood [Wed, 19 Feb 2014 07:38:10 +0000 (01:38 -0600)]
Staging: comedi: addi-data: don't initialize a static variable to 0

In hwdrv_apci1564.c, one static variable is zero initialized.  This is
unneeded and redundant, so we remove the initialization.

Signed-off-by: Chase Southwood <chase.southwood@yahoo.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoStaging: comedi: addi-data: replace printk() with dev_err() in hwdrv_apci1564.c
Chase Southwood [Wed, 19 Feb 2014 07:37:54 +0000 (01:37 -0600)]
Staging: comedi: addi-data: replace printk() with dev_err() in hwdrv_apci1564.c

There were a small handful of printk() calls in hwdrv_apci1564.c.  It is
generally better to use dev_err() for error messages instead, so I
switched all the printk() calls out, as well as cleaned up the error
strings.

Signed-off-by: Chase Southwood <chase.southwood@yahoo.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoStaging: comedi: addi-data: cleanup brace usage in hwdrv_apci1564.c
Chase Southwood [Wed, 19 Feb 2014 07:37:42 +0000 (01:37 -0600)]
Staging: comedi: addi-data: cleanup brace usage in hwdrv_apci1564.c

hwdrv_apci1564.c had many single statments wrapped in braces, so we can
delete these.  Also, some else statements were improperly placed, fix
these too.

Signed-off-by: Chase Southwood <chase.southwood@yahoo.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoStaging: comedi: addi-data: cleanup comments in hwdrv_apci1564.c
Chase Southwood [Wed, 19 Feb 2014 07:36:46 +0000 (01:36 -0600)]
Staging: comedi: addi-data: cleanup comments in hwdrv_apci1564.c

hwdrv_apci1564.c had a lot of commented out conditional statements that
were often identical to other un-commented out statements nearby, so it
should be safe to just delete all of these commented out lines.  This
patch also converts the remaining comments to the preferred kernel style
for comments.

Signed-off-by: Chase Southwood <chase.southwood@yahoo.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agousb: chipidea: need to mask when writting endptflush and endptprime
Matthieu CASTET [Wed, 19 Feb 2014 05:46:31 +0000 (13:46 +0800)]
usb: chipidea: need to mask when writting endptflush and endptprime

ENDPTFLUSH and ENDPTPRIME registers are set by software and clear
by hardware. There is a bit for each endpoint. When we are setting
a bit for an endpoint we should make sure we do not touch other
endpoint bit. There is a race condition if the hardware clear the
bit between the read and the write in hw_write.

Cc: stable <stable@vger.kernel.org> # 3.11+
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Matthieu CASTET <matthieu.castet@parrot.com>
Tested-by: Michael Grzeschik <mgrzeschik@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agostaging: binder: Fix death notifications
Arve Hjønnevåg [Mon, 17 Feb 2014 21:58:29 +0000 (13:58 -0800)]
staging: binder: Fix death notifications

The change (008fa749e0fe5b2fffd20b7fe4891bb80d072c6a) that moved the
node release code to a separate function broke death notifications in
some cases. When it encountered a reference without a death
notification request, it would skip looking at the remaining
references, and therefore fail to send death notifications for them.

Cc: Colin Cross <ccross@android.com>
Cc: Android Kernel Team <kernel-team@android.com>
Cc: stable <stable@vger.kernel.org> # 3.10
Signed-off-by: Arve Hjønnevåg <arve@android.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agosched/deadline: Remove useless dl_nr_total
Kirill Tkhai [Mon, 17 Feb 2014 22:24:13 +0000 (02:24 +0400)]
sched/deadline: Remove useless dl_nr_total

In deadline class we do not have group scheduling like in RT.

dl_nr_total is the same as dl_nr_running. So, one of them should
be removed.

Cc: Ingo Molnar <mingo@redhat.com>
Cc: Juri Lelli <juri.lelli@gmail.com>
Signed-off-by: Kirill Tkhai <tkhai@yandex.ru>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/368631392675853@web20h.yandex.ru
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
10 years agosched/deadline: Test for CPU's presence explicitly
Boris Ostrovsky [Mon, 17 Feb 2014 14:12:33 +0000 (09:12 -0500)]
sched/deadline: Test for CPU's presence explicitly

A hot-removed CPU may have ID that is numerically larger than the number of
existing CPUs in the system (e.g. we can unplug CPU 4 from a system that
has CPUs 0, 1 and 4).

Thus the WARN_ONs should check whether the CPU in question is currently
present, not whether its ID value is less than num_present_cpus().

Cc: Ingo Molnar <mingo@kernel.org>
Cc: Juri Lelli <juri.lelli@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Reported-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1392646353-1874-1-git-send-email-boris.ostrovsky@oracle.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
10 years agosched: Add 'flags' argument to sched_{set,get}attr() syscalls
Peter Zijlstra [Fri, 14 Feb 2014 16:19:29 +0000 (17:19 +0100)]
sched: Add 'flags' argument to sched_{set,get}attr() syscalls

Because of a recent syscall design debate; its deemed appropriate for
each syscall to have a flags argument for future extension; without
immediately requiring new syscalls.

Cc: juri.lelli@gmail.com
Cc: Ingo Molnar <mingo@redhat.com>
Suggested-by: Michael Kerrisk <mtk.manpages@gmail.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20140214161929.GL27965@twins.programming.kicks-ass.net
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
10 years agosched: Fix information leak in sys_sched_getattr()
Vegard Nossum [Sun, 16 Feb 2014 21:24:17 +0000 (22:24 +0100)]
sched: Fix information leak in sys_sched_getattr()

We're copying the on-stack structure to userspace, but forgot to give
the right number of bytes to copy. This allows the calling process to
obtain up to PAGE_SIZE bytes from the stack (and possibly adjacent
kernel memory).

This fix copies only as much as we actually have on the stack
(attr->size defaults to the size of the struct) and leaves the rest of
the userspace-provided buffer untouched.

Found using kmemcheck + trinity.

Fixes: d50dde5a10f30 ("sched: Add new scheduler syscalls to support an extended scheduling parameters ABI")
Cc: Dario Faggioli <raistlin@linux.it>
Cc: Juri Lelli <juri.lelli@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1392585857-10725-1-git-send-email-vegard.nossum@oracle.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
10 years agosched,numa: add cond_resched to task_numa_work
Rik van Riel [Tue, 18 Feb 2014 22:12:44 +0000 (17:12 -0500)]
sched,numa: add cond_resched to task_numa_work

Normally task_numa_work scans over a fairly small amount of memory,
but it is possible to run into a large unpopulated part of virtual
memory, with no pages mapped. In that case, task_numa_work can run
for a while, and it may make sense to reschedule as required.

Cc: akpm@linux-foundation.org
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Rik van Riel <riel@redhat.com>
Reported-by: Xing Gang <gang.xing@hp.com>
Tested-by: Chegu Vinod <chegu_vinod@hp.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1392761566-24834-2-git-send-email-riel@redhat.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
10 years agosched/core: Make dl_b->lock IRQ safe
Juri Lelli [Tue, 11 Feb 2014 08:24:27 +0000 (09:24 +0100)]
sched/core: Make dl_b->lock IRQ safe

Fix this lockdep warning:

[   44.804600] =========================================================
[   44.805746] [ INFO: possible irq lock inversion dependency detected ]
[   44.805746] 3.14.0-rc2-test+ #14 Not tainted
[   44.805746] ---------------------------------------------------------
[   44.805746] bash/3674 just changed the state of lock:
[   44.805746]  (&dl_b->lock){+.....}, at: [<ffffffff8106ad15>] sched_rt_handler+0x132/0x248
[   44.805746] but this lock was taken by another, HARDIRQ-safe lock in the past:
[   44.805746]  (&rq->lock){-.-.-.}

and interrupts could create inverse lock ordering between them.

[   44.805746]
[   44.805746] other info that might help us debug this:
[   44.805746]  Possible interrupt unsafe locking scenario:
[   44.805746]
[   44.805746]        CPU0                    CPU1
[   44.805746]        ----                    ----
[   44.805746]   lock(&dl_b->lock);
[   44.805746]                                local_irq_disable();
[   44.805746]                                lock(&rq->lock);
[   44.805746]                                lock(&dl_b->lock);
[   44.805746]   <Interrupt>
[   44.805746]     lock(&rq->lock);

by making dl_b->lock acquiring always IRQ safe.

Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Juri Lelli <juri.lelli@gmail.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1392107067-19907-3-git-send-email-juri.lelli@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
10 years agosched/core: Fix sched_rt_global_validate
Juri Lelli [Tue, 11 Feb 2014 08:24:26 +0000 (09:24 +0100)]
sched/core: Fix sched_rt_global_validate

Don't compare sysctl_sched_rt_runtime against sysctl_sched_rt_period if
the former is equal to RUNTIME_INF, otherwise disabling -rt bandwidth
management (with CONFIG_RT_GROUP_SCHED=n) fails.

Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Juri Lelli <juri.lelli@gmail.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1392107067-19907-2-git-send-email-juri.lelli@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
10 years agosched/deadline: Fix overflow to handle period==0 and deadline!=0
Steven Rostedt [Wed, 19 Feb 2014 18:53:35 +0000 (13:53 -0500)]
sched/deadline: Fix overflow to handle period==0 and deadline!=0

While debugging the crash with the bad nr_running accounting, I hit
another bug where, after running my sched deadline test, I was getting
failures to take a CPU offline. It was giving me a -EBUSY error.

Adding a bunch of trace_printk()s around, I found that the cpu
notifier that called sched_cpu_inactive() was returning a failure. The
overflow value was coming up negative?

Talking this over with Juri, the problem is that the total_bw update was
suppose to be made by dl_overflow() which, during my tests, seemed to
not be called. Adding more trace_printk()s, it wasn't that it wasn't
called, but it exited out right away with the check of new_bw being
equal to p->dl.dl_bw. The new_bw calculates the ratio between period and
runtime. The bug is that if you set a deadline, you do not need to set
a period if you plan on the period being equal to the deadline. That
is, if period is zero and deadline is not, then the system call should
set the period to be equal to the deadline. This is done elsewhere in
the code.

The fix is easy, check if period is set, and if it is not, then use the
deadline.

Cc: Juri Lelli <juri.lelli@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20140219135335.7e74abd4@gandalf.local.home
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
10 years agosched/deadline: Fix bad accounting of nr_running
Juri Lelli [Thu, 20 Feb 2014 08:19:39 +0000 (09:19 +0100)]
sched/deadline: Fix bad accounting of nr_running

Rostedt writes:

My test suite was locking up hard when enabling mmiotracer. This was due
to the mmiotracer placing all but one CPU offline. I found this out
when I was able to reproduce the bug with just my stress-cpu-hotplug
test. This bug baffled me because it would not always trigger, and
would only trigger on the first run after boot up. The
stress-cpu-hotplug test would crash hard the first run, or never crash
at all. But a new reboot may cause it to crash on the first run again.

I spent all week bisecting this, as I couldn't find a consistent
reproducer. I finally narrowed it down to the sched deadline patches,
and even more peculiar, to the commit that added the sched
deadline boot up self test to the latency tracer. Then it dawned on me
to what the bug was.

All it took was to run a task under sched deadline to screw up the CPU
hot plugging. This explained why it would lock up only on the first run
of the stress-cpu-hotplug test. The bug happened when the boot up self
test of the schedule latency tracer would test a deadline task. The
deadline task would corrupt something that would cause CPU hotplug to
fail. If it didn't corrupt it, the stress test would always work
(there's no other sched deadline tasks that would run to cause
problems). If it did corrupt on boot up, the first test would lockup
hard.

I proved this theory by running my deadline test program on another box,
and then run the stress-cpu-hotplug test, and it would now consistently
lock up. I could run stress-cpu-hotplug over and over with no problem,
but once I ran the deadline test, the next run of the
stress-cpu-hotplug would lock hard.

After adding lots of tracing to the code, I found the cause. The
function tracer showed that migrate_tasks() was stuck in an infinite
loop, where rq->nr_running never equaled 1 to break out of it. When I
added a trace_printk() to see what that number was, it was 335 and
never decrementing!

Looking at the deadline code I found:

static void __dequeue_task_dl(struct rq *rq, struct task_struct *p, int flags) {
dequeue_dl_entity(&p->dl);
dequeue_pushable_dl_task(rq, p);
}

static void dequeue_task_dl(struct rq *rq, struct task_struct *p, int flags) {
update_curr_dl(rq);
__dequeue_task_dl(rq, p, flags);

dec_nr_running(rq);
}

And this:

if (dl_runtime_exceeded(rq, dl_se)) {
__dequeue_task_dl(rq, curr, 0);
if (likely(start_dl_timer(dl_se, curr->dl.dl_boosted)))
dl_se->dl_throttled = 1;
else
enqueue_task_dl(rq, curr, ENQUEUE_REPLENISH);

if (!is_leftmost(curr, &rq->dl))
resched_task(curr);
}

Notice how we call __dequeue_task_dl() and in the else case we
call enqueue_task_dl()? Also notice that dequeue_task_dl() has
underscores where enqueue_task_dl() does not. The enqueue_task_dl()
calls inc_nr_running(rq), but __dequeue_task_dl() does not. This is
where we get nr_running out of sync.

[snip]

Another point where nr_running can get out of sync is when the dl_timer
fires:

dl_se->dl_throttled = 0;
if (p->on_rq) {
enqueue_task_dl(rq, p, ENQUEUE_REPLENISH);
if (task_has_dl_policy(rq->curr))
check_preempt_curr_dl(rq, p, 0);
else
resched_task(rq->curr);

This patch does two things:

 - correctly accounts for throttled tasks (that are now considered
   !running);

 - fixes the bug, updating nr_running from {inc,dec}_dl_tasks(),
   since we risk to update it twice in some situations (e.g., a
   task is dequeued while it has exceeded its budget).

Cc: mingo@redhat.com
Cc: torvalds@linux-foundation.org
Cc: akpm@linux-foundation.org
Reported-by: Steven Rostedt <rostedt@goodmis.org>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Juri Lelli <juri.lelli@gmail.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1392884379-13744-1-git-send-email-juri.lelli@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
10 years agowatchdog: w83697hf_wdt: return ENODEV if no device was found
Stanislav Kholmanskikh [Mon, 27 Jan 2014 07:04:33 +0000 (11:04 +0400)]
watchdog: w83697hf_wdt: return ENODEV if no device was found

Most WDT driver modules return ENODEV during modprobe if
no valid device was found, but w83697hf_wdt returns EIO.

Let w83697hf_wdt return ENODEV.

Signed-off-by: Stanislav Kholmanskikh <stanislav.kholmanskikh@oracle.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
10 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Linus Torvalds [Fri, 21 Feb 2014 18:14:15 +0000 (10:14 -0800)]
Merge git://git./linux/kernel/git/davem/sparc

Pull sparc fixes from David Miller:
 "Three minor fixes from David Howells and Paul Gortmaker"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  Sparc: sparc_cpu_model isn't in asm/system.h any more [ver #2]
  sparc32: make copy_to/from_user_page() usable from modular code
  sparc32: fix build failure for arch_jump_label_transform