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The remove() methods should not be marked __exit unless we are using
platform_driver_probe() which disables unbinding device from driver
via sysfs.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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After commit a000b8c1 [i2c: ocores: Add support for the GRLIB port of the
controller and use function pointers for getreg and setreg function],
compiling i2c-ocores.c for 64-bit gives the following warning:
drivers/i2c/busses/i2c-ocores.c: In function 'ocores_i2c_of_probe':
drivers/i2c/busses/i2c-ocores.c:334:15: warning: cast from pointer to integer of different size
Fix it by casting the pointer to long.
Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Acked-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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If timeout error occurs in the i2c transfer then it was dumping warning
of call stack.
Remove the warning dump as there is may be possibility that some slave
devices are busy and not responding the i2c communication.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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Fix printk format warning. dma_addr_t can be 32-bit or 64-bit,
so cast it to long long for printing. This also matches the
printk format specifier that is already used.
drivers/i2c/busses/i2c-ismt.c:532:3: warning: format '%llX' expects argument of type 'long long unsigned int', but argument 4 has type 'dma_addr_t' [-Wformat]
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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This patch adds the SMBus Device IDs for the Intel Wellsburg PCH
Signed-off-by: James Ralston <james.d.ralston@intel.com>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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This implements a very basic I2C host driver for the BCM2835 SoC. Missing
features so far are:
* 10-bit addressing.
* DMA.
Reviewed-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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Adding Seth Heasley and Myself as maintainers for the i2c-ismt drvier
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: "Heasley, Seth" <seth.heasley@intel.com>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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This patch corrects checkpatch errors.
The changes has also been removed as it has less meaning with version
control tools.
Signed-off-by: Amaury Decrême <amaury.decreme@gmail.com>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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This patch corrects the display of the acpi_base unsigned hex value.
Signed-off-by: Amaury Decrême <amaury.decreme@gmail.com>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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This patch replaces hexadecimal values by constants for SMBus commands.
Signed-off-by: Amaury Decrême <amaury.decreme@gmail.com>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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Datasheet on collision:
SMBus Collision (SMBCOL_STS)
This bit is set when a SMBus Collision condition occurs and
SMBus Host loses in the bus arbitration. The software should
clear this bit and re-start SMBus operation.
As the status will be cleared in transaction_end, we can remove the
sis630_write and prepare to return -EAGAIN to retry.
Signed-off-by: Amaury Decrême <amaury.decreme@gmail.com>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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The sticky bits must be cleared at the end of the transaction by writing
a 1 to all fields.
Datasheet:
SMBus Status (SMB_STS)
The following registers are all sticky bits and only can be
cleared by writing a one to their corresponding fields.
Signed-off-by: Amaury Decrême <amaury.decreme@gmail.com>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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Signed-off-by: Amaury Decrême <amaury.decreme@gmail.com>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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It was observed the Host Clock Divider was not written by the driver. It
was still set to (default) 0, if not already set by BIOS, which caused
garbage on SMBus.
This driver adds a parameters which is used to calculate the divider
appropriately for a default bitrate of 100 KHz. This new divider is only
applied if the clock divider is still default 0.
Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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Commit 70d46a2 "i2c: at91: add dt support to i2c-at91"
added DT only support for at91sam9x5. Building i2c-at91
without CONFIG_OF now warns about at91sam9x5_config as
being unused.
drivers/i2c/busses/i2c-at91.c:556:30: warning: 'at91sam9x5_config' defined but not used [-Wunused-variable]
Move at91sam9x5_config under the defined(CONFIG_OF)
guard as new AT91 SoCs will be DT only.
Signed-off-by: Joachim Eastwood <manabian@gmail.com>
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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The iSMT (Intel SMBus Message Transport) supports multi-master I2C/SMBus,
as well as IPMI. It's operation is DMA-based and utilizes descriptors to
initiate transactions on the bus.
The iSMT hardware can act as both a master and a target, although this
driver only supports being a master.
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Bill Brown <bill.e.brown@intel.com>
Tested-by: Seth Heasley <seth.heasley@intel.com>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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By default there should be no stop bit on I2C between single messages
within transfers. Fix the driver to comply and only send a stop bit at
the end of transfers or if I2C_M_STOP is set.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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Eliminate an open-coded "goto" loop by introducing a function.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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In a timeout case return an error immediately from the driver's
.master_xfer() method, instead of continuing and letting higher layers
fail.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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Reduce 2 boolean functions from "if (condition) return 1; return 0;" to
"return condition;"
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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This patch drops the i2c timing tables from this driver and instead
derives the timing based from the requested clock sleep. The timing
tables were completely wrong anyway when observed on a scope.
This new algorithm is also only derived by using a scope, but it seems
to produce much more accurate result.
Signed-off-by: Marek Vasut <marex@denx.de>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
[wsa: changed messages from dev_err to dev_warn]
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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This patch adds the PCU SMBus DeviceID for the Intel Avoton SOC.
Signed-off-by: Seth Heasley <seth.heasley@intel.com>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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Signed-off-by: Giridhar Maruthy <giridhar.m@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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Add support for the PIO mode and mixed PIO/DMA mode support. The mixed
PIO/DMA is the default mode of operation. This shall leverage overhead
that the driver creates due to setting up DMA descriptors even for very
short transfers.
The current boundary between PIO/DMA 8 bytes, transfers shorter than 8
bytes are transfered by PIO, longer transfers use DMA. The performance
of write transfers remains unchanged, while there is a minor improvement
of read performance. Reading 16KB EEPROM with DMA-only operations gives
a read speed of 39.5KB/s, while with then new mixed-mode the speed is
blazing 40.6KB/s.
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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err_cpufreq label is now used only once. It can be removed and related
code can be moved to the caller location.
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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In i2c-s3c2410 driver probe, only s3c24xx_i2c_init() needs the I2C clock
to be enabled. Moving clk_prepare_enable() and clk_disable_unprepare()
calls to around this function simplifies the return path of probe call.
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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i2c-s3c2410 driver is modified to use devm_clk_get()
and devm_request_irq(). This also simplifies the
return path in driver's probe.
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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err_noclk label redirects to a simple return statement. Move the
return statement to the caller location and remove the label.
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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cppcheck rightfully reports those as "reassigned a value before the old
one has been used."
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Linus Walleij <linus.walleij@stericsson.com>
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Amend the I2C nomadik pin controller to optionally take a pin control
handle and set the state of the pins to:
- "default" on boot, resume and before performing an i2c transfer
- "idle" after initial default, after resume default, and after each
i2c xfer
- "sleep" on suspend()
This should make it possible to optimize energy usage for the pins
both for the suspend/resume cycle, and for runtime cases inbetween
I2C transfers.
Signed-off-by: Patrice Chotard <patrice.chotard@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
[wsa: fixed braces on one else-branch]
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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Signed-off-by: Joachim Eastwood <manabian@gmail.com>
Acked-by: Ludovic Ddesroches <ludovic.desroches@atmel.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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NVIDIA's Tegra114 has following enhanced feature in i2c controller:
- Enable/disable control for per packet transfer complete interrupt.
Earlier SoCs could not disable this.
- Single clock source for standard/fast and HS mode clock speed.
The clock divisor for fast/standard mode is added into the i2c
controller to meet the HS and standard/fast mode of clock speed
from single source.
Add support for the above feature to make it functional on T114 SOCs.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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Intel Lynxpoint has two I2C controllers. These controllers are enumerated
from ACPI namespace with IDs INT33C2 and INT33C3. Add support for these to
the I2C DesignWare platform driver.
This is based on the work of Dirk Brandewie.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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In order to save power the device should be put to low power states
whenever it is not being used. We implement this by enabling minimal
runtime PM support.
There isn't much to do for the device itself as it is disabled once the
last transfer is completed but subsystem/domain runtime PM hooks can save
more power by power gating the device etc.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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If IC_EMPTYFIFO_HOLD_MASTER_EN is set to one, the DesignWare I2C controller
doesn't generate STOP on the bus when the FIFO is empty. This violates the
rules of Linux I2C stack as it requires that the STOP is issued once the
i2c_transfer() is finished.
However, there is no way to detect this from the hardware registers, so we
must make sure that the STOP bit is always set once the last byte of the
last message is transferred.
This patch is based on the work of Dirk Brandewie.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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avoid these checkpatch.pl issues :
- ERROR: "foo * bar" should be "foo *bar"
- ERROR: switch and case should be at the same indent
- ERROR: "(foo*)" should be "(foo *)"
- ERROR: do not use assignment in if condition
- ERROR: space required before the open parenthesis '('
- WARNING: suspect code indent for conditional statements
- WARNING: quoted string split across lines
- WARNING: space prohibited between function name and open parenthesis '('
- WARNING: line over 80 characters
also add spaces around some "+", "=", "*"
Signed-off-by: Laurent Navet <laurent.navet@gmail.com>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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As the at24 driver is able handle a bunch of serial storage chips other than
EEPROMs this is now mentioned in Kconfig.
Signed-off-by: Lars Poeschel <poeschel@lemonage.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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i2c_smbus_process_call has no users in the kernel, so this can be
removed. Documentation for the same has been updated accordingly.
Fixes following sparse warning.
drivers/i2c/i2c-core.c:1871:5: warning: symbol 'i2c_smbus_process_call'
was not declared. Should it be static?
[wsa: updated the documentation]
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason:
"It turns out that we had two crc bugs when running fsx-linux in a
loop. Many thanks to Josef, Miao Xie, and Dave Sterba for nailing it
all down. Miao also has a new OOM fix in this v2 pull as well.
Ilya fixed a regression Liu Bo found in the balance ioctls for pausing
and resuming a running balance across drives.
Josef's orphan truncate patch fixes an obscure corruption we'd see
during xfstests.
Arne's patches address problems with subvolume quotas. If the user
destroys quota groups incorrectly the FS will refuse to mount.
The rest are smaller fixes and plugs for memory leaks."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (30 commits)
Btrfs: fix repeated delalloc work allocation
Btrfs: fix wrong max device number for single profile
Btrfs: fix missed transaction->aborted check
Btrfs: Add ACCESS_ONCE() to transaction->abort accesses
Btrfs: put csums on the right ordered extent
Btrfs: use right range to find checksum for compressed extents
Btrfs: fix panic when recovering tree log
Btrfs: do not allow logged extents to be merged or removed
Btrfs: fix a regression in balance usage filter
Btrfs: prevent qgroup destroy when there are still relations
Btrfs: ignore orphan qgroup relations
Btrfs: reorder locks and sanity checks in btrfs_ioctl_defrag
Btrfs: fix unlock order in btrfs_ioctl_rm_dev
Btrfs: fix unlock order in btrfs_ioctl_resize
Btrfs: fix "mutually exclusive op is running" error code
Btrfs: bring back balance pause/resume logic
btrfs: update timestamps on truncate()
btrfs: fix btrfs_cont_expand() freeing IS_ERR em
Btrfs: fix a bug when llseek for delalloc bytes behind prealloc extents
Btrfs: fix off-by-one in lseek
...
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Pull cifs fixes from Steve French:
"Two small cifs fixes"
* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
fs/cifs/cifs_dfs_ref.c: fix potential memory leakage
cifs: fix srcip_matches() for ipv6
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Pull kvm fixlet from Marcelo Tosatti.
* git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: PPC: Emulate dcbf
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Pull ARM fixes from Russell King:
"A number of fixes:
Patrik found a problem with preempt counting in the VFP assembly
functions which can cause the preempt count to be upset.
Nicolas fixed a problem with the parsing of the DT when it straddles a
1MB boundary.
Subhash Jadavani reported a problem with sparsemem and our highmem
support for cache maintanence for DMA areas, and TI found a bug in
their strongly ordered memory mapping type.
Also, three fixes by way of Will Deacon's tree from Dave Martin for
instruction compatibility and Marc Zyngier to fix hypervisor boot mode
issues."
* 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
ARM: 7629/1: mm: Fix missing XN flag for for MT_MEMORY_SO
ARM: DMA: Fix struct page iterator in dma_cache_maint() to work with sparsemem
ARM: 7628/1: head.S: map one extra section for the ATAG/DTB area
ARM: 7627/1: Predicate preempt logic on PREEMP_COUNT not PREEMPT alone
ARM: virt: simplify __hyp_stub_install epilog
ARM: virt: boot secondary CPUs through the right entry point
ARM: virt: Avoid bx instruction for compatibility with <=ARMv4
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"Here's a long-pending fixes pull request for arm-soc (I didn't send
one in the -rc4 cycle).
The larger deltas are from:
- A fixup of error paths in the mvsdio driver
- Header file move for a driver that hadn't been properly converted
to multiplatform on i.MX, which was causing build failures when
included
- Device tree updates for at91 dealing mostly with their new pinctrl
setup merged in 3.8 and mistakes in those initial configs
The rest are the normal mix of small fixes all over the place; sunxi,
omap, imx, mvebu, etc, etc."
* tag 'fixes-for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (40 commits)
mfd: vexpress-sysreg: Don't skip initialization on probe
ARM: vexpress: Enable A7 cores in V2P-CA15_A7's Device Tree
ARM: vexpress: extend the MPIDR range used for pen release check
ARM: at91/dts: correct comment in at91sam9x5.dtsi for mii
ARM: at91/at91_dt_defconfig: add at91sam9n12 SoC to DT defconfig
ARM: at91/at91_dt_defconfig: remove memory specification to cmdline
ARM: at91/dts: add macb mii pinctrl config for kizbox
ARM: at91: rm9200: remake the BGA as default version
ARM: at91: fix gpios on i2c-gpio for RM9200 DT
ARM: at91/at91sam9x5 DTS: add SCK USART pins
ARM: at91/at91sam9x5 DTS: correct wrong PIO BANK values on u(s)arts
ARM: at91/at91-pinctrl documentation: fix typo and add some details
ARM: kirkwood: fix missing #interrupt-cells property
mmc: mvsdio: use devm_ API to simplify/correct error paths.
clk: mvebu/clk-cpu.c: fix memory leakage
ARM: OMAP2+: omap4-panda: add UART2 muxing for WiLink shared transport
ARM: OMAP2+: DT node Timer iteration fix
ARM: OMAP2+: Fix section warning for omap_init_ocp2scp()
ARM: OMAP2+: fix build break for omapdrm
ARM: OMAP2: Fix missing omap2xxx_clkt_vps_late_init function calls
...
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI and power management fixes from Rafael Wysocki:
- Two cpuidle initialization fixes from Konrad Rzeszutek Wilk.
- cpufreq regression fixes for AMD processors from Borislav Petkov,
Stefan Bader, and Matthew Garrett.
- ACPI cpufreq fix from Thomas Schlichter.
- cpufreq and devfreq fixes related to incorrect usage of operating
performance points (OPP) framework and RCU from Nishanth Menon.
- APEI workaround for incorrect BIOS information from Lans Zhang.
* tag 'pm+acpi-for-3.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: Add module aliases for acpi-cpufreq
ACPI: Check MSR valid bit before using P-state frequencies
PM / devfreq: exynos4_bus: honor RCU lock usage
PM / devfreq: add locking documentation for recommended_opp
cpufreq: cpufreq-cpu0: use RCU locks around usage of OPP
cpufreq: OMAP: use RCU locks around usage of OPP
ACPI, APEI: Fixup incorrect 64-bit access width firmware bug
ACPI / processor: Get power info before updating the C-states
powernow-k8: Add a kconfig dependency on acpi-cpufreq
ACPI / cpuidle: Fix NULL pointer issues when cpuidle is disabled
intel_idle: Don't register CPU notifier if we are not running.
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap
Pull regmap fixes from Mark Brown:
"One more oversight in the debugfs code was reported and fixed, plus a
documentation fix."
* tag 'regmap-fix-3.8-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
regmap: fix small typo in regmap_bulk_write comment
regmap: debugfs: Fix seeking from the cache
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Pull slave-dmaengine fixes from Vinod Koul:
"A few fixes on slave dmanengine. There are trivial fixes in imx-dma,
tegra-dma & ioat driver"
* 'fixes' of git://git.infradead.org/users/vkoul/slave-dma:
dma: tegra: implement flags parameters for cyclic transfer
dmaengine: imx-dma: Disable use of hw_chain to fix sg_dma transfers.
ioat: Fix DMA memory sync direction correct flag
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git://git.pengutronix.de/git/wsa/linux
Pill i2c fixes from Wolfram Sang:
"Here are a few, typical driver fixes for the I2C subsystem"
* 'i2c-embedded/for-current' of git://git.pengutronix.de/git/wsa/linux:
i2c-designware: add missing MODULE_LICENSE
i2c: omap: fix draining irq handling
i2c: omap: errata i462: fix incorrect ack for arbitration lost interrupt
i2c: muxes: fix wrong use of sizeof(ptr)
i2c: sirf: register i2c_client from dt child-nodes in probe entry
i2c: mxs: Fix type of error code
i2c: mxs: Fix misuse init_completion
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btrfs_start_delalloc_inodes() locks the delalloc_inodes list, fetches the
first inode, unlocks the list, triggers btrfs_alloc_delalloc_work/
btrfs_queue_worker for this inode, and then it locks the list, checks the
head of the list again. But because we don't delete the first inode that it
deals with before, it will fetch the same inode. As a result, this function
allocates a huge amount of btrfs_delalloc_work structures, and OOM happens.
Fix this problem by splice this delalloc list.
Reported-by: Alex Lyakas <alex.btrfs@zadarastorage.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
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The max device number of single profile is 1, not 0 (0 means 'as many as
possible'). Fix it.
Cc: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
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