staging: ks7010: move sdio specific register definitions into source file

This commit moves SDIO related register definitions from header
to source file. There is no need to have those into the header
because they are only being used in specific SDIO code.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: ks7010: move ROM_FILE definition into source file

This commit moves ROM_FILE from header to source file because
there is not being used outside this.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: ks7010: avoid casts in michael_mic_function calls

This commit removes casts in calls to michael_mic_function.
Most of them are nosense because types match perfectly function
parameters. To avoid also int casting for len parameter just
pass unsigned len to function which makes sense because is only
being called with unsigned int len parameters.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Fix calculation typo in msdc_init_gpd_bd

When refactoring the function msdc_init_gpd_bd, an error in the
calculation of the bd.next address was introduced. The offset has to
be added to the base address, not multiplied.

Fixes: 8f2395586cf0 ("staging: mt7621-mmc: Refactor msdc_init_gpd_bd")
Reported-by: NeilBrown <neil@brown.name>
Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Tested-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove unused card_workqueue from msdc_host

The card_workqueue field of msdc_host is already if 0'd out and there
are no references to it in the code (not even in unused code), so
remove it.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove old references to tasklet

In the current code there are '#if 0' out references on using a
tasklet instead of delayed_work. Removing these improves readability.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Add annotations about held locks

The functions msdc_command_resp and msdc_do_request are always called
with the host->lock lock held. By adding annotations, sparse is
informed about that.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Correct datatypes for io and sanitize io access

Current code discard the address space information on the base address
of the mmc controller, that causes sparse warnings. It uses the raw
read write function, that is correct for the mips architecture (little
endian), but for portability the non-raw function should be used. Also
the clear/set bit macros do direct memory access, that is also correct
for mips, but not portable.

So the type of the base address is changed to void __iomem *, that is
the type returned by the ioremap function. The set/clear bit macros
are changed to functions, that use the portable read and write
functions. The use of the raw access functions is changed to use the
non-raw ones.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Replace dma dir with mmc_get_dma_dir

Currently the dma direction is manually determined by the read status,
there is a more portable function for it, mmc_get_dma_dir, use it.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Fix dma_map_sg may map to fewer entries

The dma_map_sg function may merge several sglist entries into one, the
return value has to be saved to consider that. The data->sg_count
field is the position, where it should be saved, like it is done in
other mmc host drivers. Also the count of mapped entries is needed for
the dma setup.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove multiple assignments

Fix checkpatch: multiple assignments should be avoided, to improve
readability.
It aslo moves the second assignment out of the if/else block, that is
valid, because drv_mode is of type msdc_mode, an enum with only those
three elements, so one of the if/ else if statements is always
taken. And the second assignment can happen after the conditions.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Fix dereference before check in msdc_drv_pm

In the msdc_drv_pm function the variable mmc is dereferenced before
checked. Reordering fixes that.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Revert "staging: nvec: Augment TODO file with GPIO work item"

This reverts commit 5a3e59ce3acf2f52c8b4a6fc656c3b1e4a329f06, because the
necessary changes were applied in the "staging: nvec: convert to use GPIO
descriptors" patch.

Signed-off-by: Marc Dietrich <marvin24@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

MAINTAINERS: add maintainer for the DPAA2 PTP clock driver

This patch is to add maintainer for the DPAA2 PTP clock driver.

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: fsl-dpaa2/rtc: add rtc driver

This patch is to add driver for the DPAA2 1588 timer module (RTC)
which interfaces to up to an unlimited number of 10/100/1000 or
10G ethernet MACs, providing current time, alarm, and fiper support.
The 1588 IP control block includes these distinctive features.

- External GPIO trigger for time-stamping
- 2 Time-stamp alarms
- 3 FIPER pulse generators
- Phase adjusted output timer clock

Currently this driver only supports basic functions like
settime/gettime/adjtime/adjfreq.

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/fsl-mc: Fix DPIO error path issue

Remove unneeded call to dev_set_drvdata(dev, NULL) since the device
will be deallocated in any case.

Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/fsl-mc: Use devm_memremap/devm_ioremap for DPIO

Change the mapping of the QBMan cache enabled area from using ioremap_wc()
to devm_memremap(). This allows the __iomem attribute to be removed from
the pointer (which makes sense as accesses treat this as cacheable memory
not IO memory).  These changes allow sparse checks to pass.

Also use devm_ioremap() for the cache inhibited area so unmap occurs
automatically when the device is released.

Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8192u: Replace mdelay with usleep_range in dm_TXPowerTrackingCallback_TSSI

dm_TXPowerTrackingCallback_TSSI() is never called in atomic context.

dm_TXPowerTrackingCallback_TSSI() is only called by
dm_txpower_trackingcallback(), which is set a parameter of
INIT_DELAYED_WORK() in rtl8192_init_priv_task().

Despite never getting called from atomic context,
dm_TXPowerTrackingCallback_TSSI() calls mdelay() to busily wait.
This is not necessary and can be replaced with usleep_range() to
avoid busy waiting.

This is found by a static analysis tool named DCNS written by myself.
And I also manually check it

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8192u: Replace mdelay with usleep_range in rtl8192_usb_disconnect

rtl8192_usb_disconnect() is never called in atomic context.

rtl8192_usb_disconnect() is only set as ".disconnect" in
struct usb_driver.

Despite never getting called from atomic context,
rtl8192_usb_disconnect() calls mdelay() to busily wait.
This is not necessary and can be replaced with usleep_range() to
avoid busy waiting.

This is found by a static analysis tool named DCNS written by myself.
And I also manually check it.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8192u: Replace GFP_ATOMIC with GFP_KERNEL in ieee80211_softmac_init

ieee80211_softmac_init() is never called in atomic context.

The call chains ending up at ieee80211_softmac_init() is:
[1] ieee80211_softmac_init() <- alloc_ieee80211_rsl() <-
    rtl8192_usb_probe()

rtl8192_usb_probe() is set as ".probe" in struct usb_driver.

Despite never getting called from atomic context,
ieee80211_softmac_init() calls kzalloc() with GFP_ATOMIC,
which does not sleep for allocation.
GFP_ATOMIC is not necessary and can be replaced with GFP_KERNEL,
which can sleep and improve the possibility of sucessful allocation.

This is found by a static analysis tool named DCNS written by myself.
And I also manually check it.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8192u: Replace GFP_ATOMIC with GFP_KERNEL in prism2_wep_init

prism2_wep_init() is never called in atomic context.

prism2_wep_init() is only set as ".init" in
struct ieee80211_crypto_ops.
The call chains ending up at "->init" function are:
[1] ->init() <- ieee80211_wpa_set_encryption() <-
    ieee80211_wpa_supplicant_ioctl()
[2] ->init() <- ieee80211_wx_set_encode_ext_rsl() <-
    r8192_wx_set_enc_ext()
[3] ->init() <- ieee80211_wx_set_encode_rsl() <-
    r8192_wx_set_enc()

ieee80211_wpa_supplicant_ioctl(), r8192_wx_set_enc_ext() and
r8192_wx_set_enc() call mutex_lock(), which indicates these functions
are not called in atomic context.

Despite never getting called from atomic context,
prism2_wep_init() calls kzalloc() with GFP_ATOMIC,
which does not sleep for allocation.
GFP_ATOMIC is not necessary and can be replaced with GFP_KERNEL,
which can sleep and improve the possibility of sucessful allocation.

This is found by a static analysis tool named DCNS written by myself.
And I also manually check it

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8192u: Replace GFP_ATOMIC with GFP_KERNEL in ieee80211_tkip_init

ieee80211_tkip_init() is never called in atomic context.

ieee80211_tkip_init() is only set as ".init" in
struct ieee80211_crypto_ops.
The call chains ending up at "->init" function are:
[1] ->init() <- ieee80211_wpa_set_encryption() <-
    ieee80211_wpa_supplicant_ioctl()
[2] ->init() <- ieee80211_wx_set_encode_ext_rsl() <-
    r8192_wx_set_enc_ext()
[3] ->init() <- ieee80211_wx_set_encode_rsl() <-
    r8192_wx_set_enc()

ieee80211_wpa_supplicant_ioctl(), r8192_wx_set_enc_ext() and
r8192_wx_set_enc() call mutex_lock(), which indicates these functions
are not called in atomic context.

Despite never getting called from atomic context,
ieee80211_tkip_init() calls kzalloc() with GFP_ATOMIC,
which does not sleep for allocation.
GFP_ATOMIC is not necessary and can be replaced with GFP_KERNEL,
which can sleep and improve the possibility of sucessful allocation.

This is found by a static analysis tool named DCNS written by myself.
And I also manually check it.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8192u: Replace GFP_ATOMIC with GFP_KERNEL in ieee80211_ccmp_init

ieee80211_ccmp_init() is never called in atomic context.

ieee80211_ccmp_init() is only set as ".init" in
struct ieee80211_crypto_ops.
The call chains ending up at "->init" function are:
[1] ->init() <- ieee80211_wpa_set_encryption() <-
ieee80211_wpa_supplicant_ioctl()
[2] ->init() <- ieee80211_wx_set_encode_ext_rsl() <-
r8192_wx_set_enc_ext()
[3] ->init() <- ieee80211_wx_set_encode_rsl() <-
r8192_wx_set_enc()

ieee80211_wpa_supplicant_ioctl(), r8192_wx_set_enc_ext() and
r8192_wx_set_enc() call mutex_lock(), which indicates these functions
are not called in atomic context.

Despite never getting called from atomic context,
ieee80211_ccmp_init() calls kzalloc() with GFP_ATOMIC,
which does not sleep for allocation.
GFP_ATOMIC is not necessary and can be replaced with GFP_KERNEL,
which can sleep and improve the possibility of sucessful allocation.

This is found by a static analysis tool named DCNS written by myself.
And I also manually check it.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8192e: Fixed coding style around a plus sign

Added blank spaces between a plus sign in order to standardize the coding
style.

Signed-off-by: Joao Dalben <jhdalben@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: comedi: cb_pcidas64: fix alignment of function parameters

Fix most checkpatch.pl issues of type:

CHECK: Alignment should match open parenthesis

Signed-off-by: Gabriel Francisco Mandaji <gfmandaji@gmail.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: vc04_services: Remove depends on HAS_DMA in case of platform dependency

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: vchiq_core: Free kthreads in error case

We need to free the kthreads in error case before leaving
vchiq_init_state() otherwise we leak resources.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: vchiq_core: Move all wake-ups to one point

Move all calls of wake_up_process to one point, whichs makes the
following implementation of clean-up code easier.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: vchiq_arm: Avoid long udelay

vchiq_initialise() is used in non-interrupt context, so we can
replace udelay with usleep_range as suggested by timers-howto.txt.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: vchiq_arm: Fix multiline dereferences

Multiline dereferences aren't nice to review. So fix this checkpatch
warning.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: vc04_services: Use __func__ macro

It's better to use the __func__ macro instead of open-code the function
name. This fixes the following checkpatch warning:

WARNING: Prefer using '"%s...", __func__' to using 'x',
this function's name, in a string

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: vchiq_core: remove BITSET_ZERO

Hiding memset behind a macro isn't the best, because it relies on that
the parameter is not a pointer. Luckily all user has been removed, so
we can remove BITSET_ZERO too.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: vchiq_core: Remove stackhog in process_free_queue

This removes the stackhog in process_free_queue by allocating the
necessary memory within the recycle thread main function instead
of the stack.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: vchiq_core: Fix missing semaphore release in error case

The bail out branch in case of a invalid tx_pos missed a semaphore
release. Dan Carpenter found this with a static checker.

Fixes: d1eab9dec610 ("staging: vchiq_core: Bail out in case of invalid tx_pos")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: vboxvideo: Fix line size exceeding 80 columns.

This patch fixes the checkpatch.pl warning:

WARNING: line over 80 characters
+               vbva = (void __force *)vbox->vbva_buffers + i *
VBVA_MIN_BUFFER_SIZE;

Signed-off-by: Daniel Junho <djunho@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wilc1000: Remove unnecessary braces {} around single statement block

Remove unnecessary braces {} around an 'if' statement block with a single
statement. Issue found by checkpatch.

Signed-off-by: Eyal Ilsar <edilsar@gmail.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Staging: most: Move comments to the end of line

Signed-off-by: Ian Liu Rodrigues <ian.liu88@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: pi433: Fixed typos and grammar in documentation

Some typos and grammar issues were found in the documentation. These
mistakes were fixed.

Signed-off-by: Shannon Booth <shannon.ml.booth@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: pi433: use help in Kconfig description

Fixes checkpatch warning:

  WARNING: prefer 'help' over '---help---' for new help texts

Signed-off-by: Valentin Vidic <Valentin.Vidic@CARNet.hr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: pi433: break long lines in rf69.c

Breaks long lines in rf69.c, fixing checkpatch.pl warnings:
"WARNING: line over 80 characters"

Signed-off-by: Simon Sandström <simon@nikanor.nu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: pi433: break long lines

Breaks long lines in rf69.h, fixing checkpatch.pl warnings:
"WARNING: line over 80 characters"

Signed-off-by: Simon Sandström <simon@nikanor.nu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: pi433: cleanup tx_fifo locking

pi433_write requires locking due to multiple writers.  After acquiring
the lock check if enough free space is available in the kfifo to write
the whole message. This check should prevent partial writes to tx_fifo
so kfifo_reset is not needed anymore.

pi433_tx_thread is the only reader so it does not require locking
after kfifo_reset is removed.

Signed-off-by: Valentin Vidic <Valentin.Vidic@CARNet.hr>
Reviewed-by: Marcus Wolf <marcus.wolf@wolf-entwicklungen.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: greybus: simplify getting .drvdata

We should get drvdata from struct device directly. Going via
platform_device is an unneeded step back and forth.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: greybus: Fix warning to limit chars per line

Wrap comment to fix warning "prefer a maximum 75 chars per line"

Signed-off-by: Gaurav Dhingra <gauravdhingra.gxyd@gmail.com>
Acked-by: Vaibhav Agarwal <vaibhav.sr@gmail.com>
Reviewed-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove unused field dma_addr of msdc_host

The dma_addr field of msdc_host is never used, so remove it.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove unused field cmd_rsp_done of msdc_host

The cmd_rsp_done field of msdc_host is never used, so remove it.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove unused field cmd_r1b_done in msdc_host

The field cmd_r1b_done in msdc_host is unused, so remove it.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove unused field dma_left_size of msdc_host

The dma_left_size field of msdc_host is never used, remove it.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621:mmc: Remove unused field reserved from msdc_host

The reserved field of msdc_host is never used and msdc_host is also
never exposed to hardware, so remove that field.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove unused field starttime from msdc_host

The starttime field of msdc_host is never used, remove it.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Change default transfer mode to DMA

The current default transfer is to use DMA or not depending on the
size of the data. The upstream driver mtk-sd uses DMA all times,
change the standard mode here to DMA for testing, if there are any
performance problems with DMA for small data sizes. If not, the option
for transfer mode should be removed in the future,

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Refactor msdc_init_gpd_bd

The msdc_init_gpd_bd function is currently hard to read, because of
old, commented out code and a while loop, where a for loop is much
easier to read. Refactor it to make the code more readable.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove unused field xfersz from msdc_dma

The xfersz field of msdc_dma is only set to host->xfer_size and this
is also available at the (few) positions, where dma.xfersz is used, so
it is removed.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove flags from msdc_dma

The flags of msdc_dma are set to a constant value, so block and dword
padding are disabled and checksum is enabled. By removing the field
the code is easier to read and the difference to the mtk-sd driver is
smaller.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove unused fields from msdc_dma

The fields used_gpd|bd in struct msdc_dma are only set and reset, but
never used, so remove them. The other removed fields are never used,
so they were removed either.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Start cleanup of msdc_dma_config

Currently the msdc_dma_config function has some variables, that are
not needed, uses the macro msdc_init_bd that is only used here and
does not use the for_each_sg iterator. That last fact could cause a
bug if the scatterlist is chained.

The function is changed to remove these things, but none of the
changes should change the behavior of it (despite the case of a linked
scatterlist).

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove unused function msdc_dma_dump

The msdc_dma_dump function is disabled by a preprocessor macro, was
only used in the msdc_dma_setup function. The code also contains no
information about the device, it only dumps some memory for debug.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove unused field burstsz from msdc_dma

The burstsz field in msdc_dma is set to a constant value and later
only used two times, using the constant directly in that places allows
to remove the field and improves readability.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove unused field data_offset from msdc_hw

The data_offset field in msdc_hw is never used, so remove it.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Relax cpu while waiting for stable clock

Current code just busy waits with nop for clock becoming stable,
relaxing the cpu here improves readability and portability and also
removes a unnecessary difference with the mtk-sd driver.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove code for not existent config

The MT7621|7628_FPGA config flags are non existent in the tree, so
code guarded by this flags can be removed.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Refactor and rename msdc_reset to msdc_reset_hw

In the current code the hardware reset is realised via a macro and
does only wait for a certain ammount of time for the controller to
come out of reset state, but it should wait until it IS out of reset
state. So it is refactored to improve this, it is also changed from a
macro to a function and renamed to msdc_reset_hw to match the mtk-sd
driver.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove power callbacks from msdc_hw

The ext_power_on|off fields of msdc_hw are never set, and only once
checked for not being zero, so they can just be removed.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Fix null pointer deref if ext sdio irq enabled

The enable|disable_sdio_irq() fields of msdc_hw are never set, so when
they are called, they are null pointer. In case of the
MSDC_EXT_SDIO_IRQ flag set in msdc0_hw, this happens. But because
these fields are never set, they can simply be removed.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove unused field disable_cd_eirq

The disable_cd_eirq() field of msdc_hw is never set and only once
checked for being non zero, so it is deleted.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove unused field enable_cd_eirq from msdc_hw

The enable_cd_eirq() field of msdc_hw is never set and only once
checked for not being zero, so it is removed.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove unused field get_cd_status from msdc_hw

The get_cd_status() field of msdc_hw is never set and there is only
one check for it being non zero, so it is deleted.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove unused code from board.h

The board.h file contins lot of never used code, to clean up the
driver, this code is removed.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-spi: Remove redundant owner assignment

Remove the owner assignment form the platform driver as
platform_driver_register() already initializes the owner.
Found using coccinelle.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-pinctrl: Remove redundant owner assignment

Remove the owner assignment form the platform driver as
platform_driver_register() already initializes the owner.
Found using coccinelle.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-pci: Remove redundant owner assignment

Remove the owner assignment form the platform driver as
platform_driver_register() already initializes the owner.
Found using coccinelle.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove redundant opcode check

The opcode check in msdc_command_start is redundant in case of
MMC_SET_RELATIVE_ADDR, this is 3 like SD_SEND_RELATIVE_ADDR, so the
second check can be removed.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Fix: copy_from_user() returns a positive value

copy_from_user() returns a positive value in case of an error, to fix
this the check is turned around, also a better return value is chosen.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Fix debug file world writable

Currently the debug file in proc fs is world writable, remove the
access for other.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove error message in debug

If the debug file in proc fs is not successfully created current code
prints an error message, this is removed. de is also not an error
pointer, so the IS_ERR() call leads to a static checker warning. The
unused return value of the msdc_debug_proc_init function is also removed.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove constant flag MSDC_HIGHSPEED

The MSDC_HIGHSPEED flag is always set and never unset, remove it to
clean up the code.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove unused functions

The functions msdc_eirq_cd and msdc_eirq_sdio are defined but never
used, so they are removed. This also fixes two compiler warnings:

drivers/staging/mt7621-mmc/sd.c:517:13: warning: ‘msdc_eirq_cd’ defined but
not used [-Wunused-function]
 static void msdc_eirq_cd(void *data)
             ^~~~~~~~~~~~
drivers/staging/mt7621-mmc/sd.c:507:13: warning: ‘msdc_eirq_sdio’ defined but
not used [-Wunused-function]
 static void msdc_eirq_sdio(void *data)

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove unused global: msdc_6575_host

The mt6575_host variable is never used, only set and
exported. Removing it for code cleanup.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove constant flag

The MSDC_SYS_SUSPEND flag is always set and is never unset. Removing
it cleans up the code.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Fix power management by removing old api

The mmc_suspend|resume_host functions have been decrepated in the
3.11 [1] release and were completely removed in 3.13 [2]. Removing the
calls to this functions as it was done for other mmc host drivers
before the old api was removed (eg. [3]) fixes compile errors in this
driver while CONFIG_PM is enabled.

The rest of the removed code is simply dead, the MSDC_SYS_SUSPEND flag
is always set and will be removed in a later patch.

[1] commit 986892ca78ee ("mmc: core: Initiate suspend|resume from mmc bus instead of mmc host")
[2] commit 3c0d22e8180b ("mmc: core: Remove deprecated mmc_suspend|resume_host APIs")
[3] commit 1e63d4854202 ("mmc: au1xmmc: Move away from using deprecated APIs")

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove duplicate defines

Remove defines that are both in board.h and sd.c from sd.c, this file
already includes board.h

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Fix requesting of irq

The request of the irq line is not correctly handled by the current
code, platform_get_irq may fail and if the irq is requested via
devm_request_irq, its release is automatically done.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Fix dma_alloc_coherent should get device as first param

The dma_alloc_coherent (and also dma_free_coherent) should get the
device, the dma memory is allocated for as the first parameter.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove dead codepath from probe function

The probe function contains lots of code, that is never used, because
the fields it checks for in the msdc_hw structure are never
initialized. Removing them should be safe.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Fix different caps for different devices

Current code saves the need for polling in a global variable, that
leeds to problems, when the driver should handle multiple devices with
different capabilities. By looking up the capability in the mmc_host
capabilities, they now have per device scope.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove unnecessary field from struct msdc_hw

Remove the unnecessary field data_pins from msdc_hw, later this
information should be taken from the device tree.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove unnecessary setting of dev.platform_data

In the probe function, pdev->dev.platform_data is set to &msdc0_hw,
but the only get access to that is also in the probe function. So that
assignment is removed. The msdc0_hw structure is still available to the
driver as part of the msdc_host structure.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Fix bug on dma_alloc_coherent fail

In case of dma_alloc_coherent failing the current code just called
BUG_ON. By adding error handling for that case this can be avoided.
This also fixes a memory leek in case of a fail later on in the probe
function.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Fix unmatched release_mem_regin

Current code calls release_mem_regin on driver remove without
requesting it explicit first. The region is only requested via
devm_ioremap_resource and that releases it automatically. Removing the
release_mem_region calls fixes this.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove code checking for old kernel versions

Remove code, that is checking for old kernel versions, leaving only
the case for current versions.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Fix memory leek in case of error in probe

If the base address is not successfully obtained in the probe
function, then the mmc_host struct is not freed. Adding an exit for
that case fixes the bug.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Refactor suspend, resume

Refactor msdc_drv_{suspend, resume} by adding a new function
msdc_drv_pm, that cleans up the code and removes double code.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Cleanup function mt_msdc_init

Cleanup the mt_msdc_init function, remove excceding printk.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove unused datastructures

Remove unused datastructures and comments referring to their former use.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove code for different soc types

Remove code that is intended for soc other then the mt7621 because
this driver is only for that soc. This also removes some conditions.
However the remaining code is also at the wrong place, it just selects
the mode of the pins, this is a job for pinctl not for the sdxc driver.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove code guarded by nonexistent config option

Remove a piece of code that is guarded by a config option, that is
nonexistent, the function it calls is also nonexistent.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Replace seq_printf with seq_puts where possible

Replace seq_printf with seq_puts when the string is const.
Fix checkpatch warning: PREFER_SEQ_PUTS

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove redundant driver owner assignment

Remove the owner assignment form the platform driver as
platform_driver_register() already initializes the owner.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Fix style of braces

Fix checkpatch errors, warnings, checks about braces:
BRACES, ELSE_AFTER_BRACE, OPEN_BRACE

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-mmc: Remove global initialise to 0

Fix checkpatch error: GLOBAL_INITIALISERS

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>