Jon Hunter 23a1ec304a dmaengine: tegra-apb: Simplify locking for device using global pause ... Sparse reports the following with regard to locking in the tegra_dma_global_pause() and tegra_dma_global_resume() functions: drivers/dma/tegra20-apb-dma.c:362:9: warning: context imbalance in 'tegra_dma_global_pause' - wrong count at exit drivers/dma/tegra20-apb-dma.c:366:13: warning: context imbalance in 'tegra_dma_global_resume' - unexpected unlock The warning is caused because tegra_dma_global_pause() acquires a lock but does not release it. However, the lock is released by tegra_dma_global_resume(). These pause/resume functions are called in pairs and so it does appear to work. This global pause is used on early tegra devices that do not have an individual pause for each channel. The lock appears to be used to ensure that multiple channels do not attempt to assert/de-assert the global pause at the same time which could cause the DMA controller to be in the wrong paused state. Rather than locking around the entire code between the pause and resume, employ a simple counter to keep track of the global pause requests. By using a counter, it is only necessary to hold the lock when pausing and unpausing the DMA controller and hence, fixes the sparse warning. Please note that for devices that support individual channel pausing, the DMA controller lock is not held between pausing and unpausing the channel. Hence, this change will make the devices that use the global pause behave in the same way, with regard to locking, as those that don't. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>		2015-08-20 12:10:25 +05:30
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accessibility
acpi	Additional ACPICA material for v4.2-rc1	2015-07-02 17:11:28 -07:00
amba
android
ata	ARM: SoC cleanups for v4.2	2015-06-26 11:08:27 -07:00
atm
auxdisplay
base	Merge branch 'akpm' (patches from Andrew)	2015-07-01 17:47:51 -07:00
bcma
block	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-07-04 19:36:06 -07:00
bluetooth	Bluetooth: ath3k: Add support of 04ca:300d AR3012 device	2015-06-18 21:00:06 +03:00
bus	ARM: SoC: driver updates for v4.2	2015-06-26 11:54:29 -07:00
cdrom
char	Merge tag 'drm-intel-next-fixes-2015-07-02' of git://anongit.freedesktop.org/drm-intel	2015-07-02 14:36:40 -07:00
clk	Replace module_platform_driver with builtin_platform driver in non modules.	2015-07-02 10:42:13 -07:00
clocksource	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-07-01 15:44:18 -07:00
connector
cpufreq	Replace module_platform_driver with builtin_platform driver in non modules.	2015-07-02 10:42:13 -07:00
cpuidle	Replace module_platform_driver with builtin_platform driver in non modules.	2015-07-02 10:42:13 -07:00
crypto	crypto: marvell/cesa - another fix up for of_get_named_gen_pool() rename	2015-07-03 11:37:02 -07:00
dca
devfreq
dio
dma	dmaengine: tegra-apb: Simplify locking for device using global pause	2015-08-20 12:10:25 +05:30
dma-buf
edac	A build fix for octeon_edac from Aaro Koskinen.	2015-07-03 12:10:12 -07:00
eisa
extcon	extcon: Redefine the unique id of supported external connectors without 'enum extcon' type	2015-06-12 17:01:42 -07:00
firewire
firmware	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2015-07-03 15:20:57 -07:00
fmc
gpio	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-07-01 15:19:35 -07:00
gpu	dmaengine: ipu: Use irq_desc_get_xxx() to avoid redundant lookup of irq_desc	2015-07-16 18:41:18 +05:30
hid	Merge branches 'for-4.2/i2c-hid', 'for-4.2/lenovo', 'for-4.2/plantronics', 'for-4.2/rmi', 'for-4.2/sensor-hub', 'for-4.2/sjoy', 'for-4.2/sony' and 'for-4.2/wacom' into for-linus	2015-06-22 16:23:43 +02:00
hsi	Fix up implicit <module.h> users that will break later.	2015-07-02 10:25:22 -07:00
hv	Drivers: hv: vmbus: Allocate ring buffer memory in NUMA aware fashion	2015-06-12 16:58:33 -07:00
hwmon	hwmon: (w83627ehf) Use swap() in w82627ehf_swap_tempreg()	2015-07-03 14:39:06 +02:00
hwspinlock	hwspinlock: qcom: Correct msb in regmap_field	2015-07-01 16:15:05 +03:00
hwtracing/coresight
i2c	Char/Misc driver patches for 4.2-rc1	2015-06-26 14:51:15 -07:00
ide	Minor merge needed, due to function move.	2015-07-01 10:49:25 -07:00
idle
iio
infiniband	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-07-04 19:36:06 -07:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2015-07-04 08:14:22 -07:00
iommu	IOMMU Fixes for Linux v4.2-rc0	2015-07-01 14:44:22 -07:00
ipack
irqchip	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-07-04 09:22:51 -07:00
isdn	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2015-06-24 16:49:49 -07:00
leds	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds	2015-07-01 19:09:11 -07:00
lguest	Merge branch 'x86-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-06-22 17:59:09 -07:00
macintosh	macintosh/nvram: Remove as unused	2015-06-15 16:42:37 +10:00
mailbox	Replace module_init with appropriate alternate initcall in non modules.	2015-07-02 10:36:29 -07:00
mcb
md	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-07-04 19:36:06 -07:00
media	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds	2015-07-01 19:09:11 -07:00
memory	ARM: SoC: driver updates for v4.2	2015-06-26 11:54:29 -07:00
memstick	memstick: remove deprecated use of pci api	2015-06-30 19:44:57 -07:00
message	fusion: remove dead MTRR code	2015-06-13 08:44:14 -07:00
mfd	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-07-01 15:19:35 -07:00
misc	Minor merge needed, due to function move.	2015-07-01 10:49:25 -07:00
mmc	ARM: SoC: late fixes and dependencies	2015-07-02 14:40:49 -07:00
mtd	Minor merge needed, due to function move.	2015-07-01 10:49:25 -07:00
net	A very significant modification to NTB in this series.	2015-07-04 14:07:47 -07:00
nfc	Char/Misc driver patches for 4.2-rc1	2015-06-26 14:51:15 -07:00
ntb	NTB: Add split BAR output for debugfs stats	2015-07-04 14:09:32 -04:00
nubus
nvdimm	arch, x86: pmem api for ensuring durability of persistent memory updates	2015-06-26 11:23:38 -04:00
of	Devicetree changes for v4.2	2015-07-01 19:40:18 -07:00
oprofile
parisc
parport	parport: check exclusive access before register	2015-06-12 16:58:33 -07:00
pci	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-07-01 15:19:35 -07:00
pcmcia	Fix up implicit <module.h> users that will break later.	2015-07-02 10:25:22 -07:00
phy	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	2015-06-27 12:44:34 -07:00
pinctrl	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-07-01 15:19:35 -07:00
platform	platform-drivers-x86 for 4.2-2	2015-07-05 10:54:09 -07:00
pnp	Merge branches 'pnp' and 'pm-tools'	2015-06-19 01:18:43 +02:00
power	Replace module_platform_driver with builtin_platform driver in non modules.	2015-07-02 10:42:13 -07:00
powercap
pps
ps3
ptp
pwm	pwm: Changes for v4.2-rc1	2015-06-23 13:32:38 -07:00
rapidio	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2015-06-23 14:08:54 -07:00
ras
regulator	Fix up implicit <module.h> users that will break later.	2015-07-02 10:25:22 -07:00
remoteproc	remoteproc: fix !CONFIG_OF build breakage	2015-06-18 11:44:41 +03:00
reset
rpmsg
rtc	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	2015-06-27 12:44:34 -07:00
s390	KVM: s390: virtio-ccw: don't overwrite config space values	2015-07-03 18:55:18 +02:00
sbus
scsi	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-07-04 14:13:43 -07:00
sfi
sh	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-07-01 15:19:35 -07:00
sn
soc	ARM: SoC: late fixes and dependencies	2015-07-02 14:40:49 -07:00
spi	Merge remote-tracking branches 'spi/topic/sirf', 'spi/topic/spidev' and 'spi/topic/zynq' into spi-next	2015-06-18 00:19:56 +01:00
spmi
ssb
staging	Staging driver patches for 4.2-rc1	2015-06-26 15:46:08 -07:00
target	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-07-04 14:13:43 -07:00
tc
thermal	Minor merge needed, due to function move.	2015-07-01 10:49:25 -07:00
thunderbolt
tty	ARM: SoC: late fixes and dependencies	2015-07-02 14:40:49 -07:00
uio	uio: pruss: Drop depends on ARCH_DAVINCI_DA850 from config	2015-06-12 17:01:43 -07:00
usb	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-07-04 19:36:06 -07:00
uwb
vfio	VFIO updates for v4.2	2015-06-28 12:32:13 -07:00
vhost	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-07-04 14:13:43 -07:00
video	fbdev fixes for 4.2	2015-07-03 12:11:17 -07:00
virt
virtio	virtio/vhost: cross endian support	2015-07-03 16:02:25 -07:00
vlynq
vme	vme: tsi148: depend on HAS_DMA for Kconfig	2015-06-12 17:31:05 -07:00
w1	w1: use correct lock on error in w1_seq_show()	2015-06-12 16:58:33 -07:00
watchdog	Merge git://www.linux-watchdog.org/linux-watchdog	2015-07-01 19:33:16 -07:00
xen	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-07-04 14:13:43 -07:00
zorro
Kconfig	libnvdimm, nfit: initial libnvdimm infrastructure and NFIT support	2015-06-24 21:24:10 -04:00
Makefile	The libnvdimm sub-system introduces, in addition to the libnvdimm-core,	2015-06-29 10:34:42 -07:00