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linux/drivers/dma
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Bartlomiej Zolnierkiewicz da331ba8e9 drivers/dma/pl330.c: fix locking in pl330_free_chan_resources() 
tasklet_kill() may sleep so call it before taking pch->lock.

Fixes following lockup:

  BUG: scheduling while atomic: cat/2383/0x00000002
  Modules linked in:
    unwind_backtrace+0x0/0xfc
    __schedule_bug+0x4c/0x58
    __schedule+0x690/0x6e0
    sys_sched_yield+0x70/0x78
    tasklet_kill+0x34/0x8c
    pl330_free_chan_resources+0x24/0x88
    dma_chan_put+0x4c/0x50
  [...]
  BUG: spinlock lockup suspected on CPU#0, swapper/0/0
   lock: 0xe52aa04c, .magic: dead4ead, .owner: cat/2383, .owner_cpu: 1
    unwind_backtrace+0x0/0xfc
    do_raw_spin_lock+0x194/0x204
    _raw_spin_lock_irqsave+0x20/0x28
    pl330_tasklet+0x2c/0x5a8
    tasklet_action+0xfc/0x114
    __do_softirq+0xe4/0x19c
    irq_exit+0x98/0x9c
    handle_IPI+0x124/0x16c
    gic_handle_irq+0x64/0x68
    __irq_svc+0x40/0x70
    cpuidle_wrap_enter+0x4c/0xa0
    cpuidle_enter_state+0x18/0x68
    cpuidle_idle_call+0xac/0xe0
    cpu_idle+0xac/0xf0

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Cc: Vinod Koul <vinod.koul@linux.intel.com>
Cc: Tomasz Figa <t.figa@samsung.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-03 16:07:22 -07:00
..
bestcomm Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-02-23 17:09:55 -08:00
ioat Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma 2013-05-09 09:46:45 -07:00
ipu dma: ipu: ipu_idmac: Fix section mismatch 2013-04-15 09:51:18 +05:30
ppc4xx Drivers: dma: remove __dev* attributes. 2013-01-03 15:57:15 -08:00
sh sudmac: add support for SUDMAC 2013-04-30 15:50:12 +05:30
acpi-dma.c dma: acpi-dma: parse CSRT to extract additional resources 2013-05-14 10:23:57 +05:30
amba-pl08x.c pl080.h: moved from arm/include/asm/hardware to include/linux/amba/ 2013-01-13 05:19:45 -08:00
at_hdmac_regs.h at_hdmac: move to generic DMA binding 2013-04-30 14:17:41 +05:30
at_hdmac.c Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma 2013-05-09 09:46:45 -07:00
coh901318_lli.c Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma 2013-02-26 09:24:48 -08:00
coh901318.c dma: coh901318: add devicetree support 2013-06-17 13:54:27 +02:00
coh901318.h dma: coh901318: merge header files 2013-01-07 17:36:37 +01:00
dmaengine.c Merge branch 'topic/of' into for-linus 2013-05-02 21:52:26 +05:30
dmaengine.h dmaengine: consolidate initialization of cookies 2012-03-13 11:37:22 +05:30
dmatest.c dmatest: do not allow to interrupt ongoing tests 2013-06-08 02:13:44 +05:30
dw_dmac_regs.h dw_dmac: add ACPI support 2013-04-15 22:04:19 +05:30
dw_dmac.c dw_dmac: add ACPI support 2013-04-15 22:04:19 +05:30
edma.c ARM: davinci: move private EDMA API to arm/common 2013-06-18 10:52:03 +05:30
ep93xx_dma.c dma: ep93xx_dma: reuse is_slave_direction helper 2013-01-12 05:07:22 -08:00
fsldma.c dma: remove use of __devinit 2012-11-28 12:42:36 -08:00
fsldma.h dmaengine: move last completed cookie into generic dma_chan structure 2012-03-13 11:36:06 +05:30
imx-dma.c dma: imx-dma: Remove redundant NULL check before kfree 2013-04-15 09:51:18 +05:30
imx-sdma.c dma: Remove erroneous __exit and __exit_p() references 2013-04-15 09:51:16 +05:30
intel_mid_dma_regs.h dma: fix comments 2012-09-01 08:57:12 -07:00
intel_mid_dma.c Drivers: dma: remove __dev* attributes. 2013-01-03 15:57:15 -08:00
iop-adma.c Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma 2013-02-26 09:24:48 -08:00
iovlock.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
Kconfig dmaengine: edma: enable build for AM33XX 2013-06-24 15:55:08 +05:30
Makefile dma: sh: add Kconfig 2013-04-30 15:50:12 +05:30
mmp_pdma.c Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma 2013-02-26 09:24:48 -08:00
mmp_tdma.c dma: Convert to devm_ioremap_resource() 2013-01-25 12:21:46 -08:00
mpc512x_dma.c Drivers: dma: remove __dev* attributes. 2013-01-03 15:57:15 -08:00
mv_xor.c Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma 2013-02-26 09:24:48 -08:00
mv_xor.h dma: mv_xor: clear the window override control registers 2012-11-22 18:16:37 +01:00
mxs-dma.c dma: mxs-dma: move to generic device tree binding 2013-04-04 21:22:43 +08:00
of-dma.c dma:of: Use a mutex to protect the of_dma_list 2013-05-02 21:50:38 +05:30
omap-dma.c dmaengine: OMAP: Register SDMA controller with Device Tree DMA driver 2013-04-15 09:51:19 +05:30
pch_dma.c pch_dma: Use GFP_ATOMIC because called from interrupt context 2013-04-15 09:51:16 +05:30
pl330.c drivers/dma/pl330.c: fix locking in pl330_free_chan_resources() 2013-07-03 16:07:22 -07:00
sa11x0-dma.c Drivers: dma: remove __dev* attributes. 2013-01-03 15:57:15 -08:00
sirf-dma.c dmaengine: sirf: move driver init from module_init to subsys_initcall 2013-05-02 20:48:23 +05:30
ste_dma40_ll.c dmaengine: ste_dma40_ll: Replace meaningless register set with comment 2013-06-04 11:12:10 +02:00
ste_dma40_ll.h dmaengine: ste_dma40: Remove unnecessary call to d40_phy_cfg() 2013-05-23 21:13:19 +02:00
ste_dma40.c DMA40 fixes for earlier submitted driver patches: 2013-06-25 11:20:15 -07:00
tegra20-apb-dma.c drivers/dma: don't check resource with devm_ioremap_resource 2013-05-18 11:54:55 +02:00
timb_dma.c dma: timb_dma: Fix compiler warning 2013-04-15 09:51:16 +05:30
TODO dmaengine: remove ste_dma40 from issue_pending TODO 2011-07-14 04:02:08 +05:30
txx9dmac.c dma: Remove erroneous __exit and __exit_p() references 2013-04-15 09:51:16 +05:30
txx9dmac.h dmaengine: move last completed cookie into generic dma_chan structure 2012-03-13 11:36:06 +05:30
virt-dma.c dmaengine: virt-dma: add support for cyclic DMA periodic callbacks 2012-07-01 14:15:23 +01:00
virt-dma.h dmaengine: virt-dma: add support for cyclic DMA periodic callbacks 2012-07-01 14:15:23 +01:00