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History

Will Deacon 0baf8f6a2a dma: pl330: ensure DMA descriptors are zero-initialised

I see the following splat with 3.13-rc1 when attempting to perform DMA:

[  253.004516] Alignment trap: not handling instruction e1902f9f at [<c0204b40>]
[  253.004583] Unhandled fault: alignment exception (0x221) at 0xdfdfdfd7
[  253.004646] Internal error: : 221 [#1] PREEMPT SMP ARM
[  253.004691] Modules linked in: dmatest(+) [last unloaded: dmatest]
[  253.004798] CPU: 0 PID: 671 Comm: kthreadd Not tainted 3.13.0-rc1+ #2
[  253.004864] task: df9b0900 ti: df03e000 task.ti: df03e000
[  253.004937] PC is at dmaengine_unmap_put+0x14/0x34
[  253.005010] LR is at pl330_tasklet+0x3c8/0x550
[  253.005087] pc : [<c0204b44>]    lr : [<c0207478>]    psr: a00e0193
[  253.005087] sp : df03fe48  ip : 00000000  fp : df03bf18
[  253.005178] r10: bf00e108  r9 : 00000001  r8 : 00000000
[  253.005245] r7 : df837040  r6 : dfb41800  r5 : df837048  r4 : df837000
[  253.005316] r3 : dfdfdfcf  r2 : dfb41f80  r1 : df837048  r0 : dfdfdfd7
[  253.005384] Flags: NzCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
[  253.005459] Control: 30c5387d  Table: 9fb9ba80  DAC: fffffffd
[  253.005520] Process kthreadd (pid: 671, stack limit = 0xdf03e248)

This is due to desc->txd.unmap containing garbage (uninitialised memory).

Rather than add another dummy initialisation to _init_desc, instead
ensure that the descriptors are zero-initialised during allocation and
remove the dummy, per-field initialisation.

Cc: Andriy Shevchenko <andriy.shevchenko@intel.com>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

2013-12-18 10:08:56 -08:00

..

drivers: clean-up prom.h implicit includes

2013-10-09 20:04:04 -05:00

Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma

2013-11-20 13:20:24 -08:00

Merge commit 'dmaengine-3.13-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine

2013-11-16 12:02:36 +05:30

dmaengine: ipu: fix warnings from 64-bit dma_addr_t printouts

2013-11-13 14:10:48 +05:30

dma: fix build warnings in ppc4xx

2013-12-12 22:43:41 -08:00

rcar-hpbdma: initialise plane information when halted

2013-11-28 13:46:00 +05:30

acpi-dma.c

acpi-dma: remove ugly conversion

2013-08-25 16:43:45 +05:30

amba-pl08x.c

Fix pl08x warnings

2013-12-04 11:22:05 +05:30

at_hdmac_regs.h

dmaengine: at_hdmac: remove unused function

2013-12-12 22:43:41 -08:00

at_hdmac.c

Merge commit 'dmaengine-3.13-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine

2013-11-16 12:02:36 +05:30

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

dmaengine: coh901318: use DMA_COMPLETE for dma completion status

2013-10-25 11:15:56 +05:30

coh901318.h

dma: coh901318: merge header files

2013-01-07 17:36:37 +01:00

cppi41.c

dma: cppi41: return code > 0 of pm_runtime_get_sync() is not an error

2013-11-12 14:28:25 +05:30

dma-jz4740.c

dmaengine: jz4740: use DMA_COMPLETE for dma completion status

2013-10-25 11:15:58 +05:30

dmaengine.c

dmaengine: fix sleep in atomic

2013-12-13 00:57:03 -08:00

dmaengine.h

dmaengine: consolidate initialization of cookies

2012-03-13 11:37:22 +05:30

dmatest.c

dmatest: fix build warning on mips

2013-12-12 22:43:41 -08:00

edma.c

Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma

2013-11-20 13:20:24 -08:00

ep93xx_dma.c

dmaengine: remove DMA unmap from drivers

2013-11-14 11:04:38 -08:00

fsldma.c

dma: fix fsldma build warnings

2013-12-12 22:43:41 -08:00

fsldma.h

DMA: Freescale: update driver to support 8-channel DMA engine

2013-11-13 14:26:27 +05:30

imx-dma.c

Merge branch 'for-linus' into next

2013-10-31 22:36:13 +05:30

imx-sdma.c

Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma

2013-11-20 13:20:24 -08:00

intel_mid_dma_regs.h

dma: fix comments

2012-09-01 08:57:12 -07:00

intel_mid_dma.c

dmaengine: intel_mid_dma: use DMA_COMPLETE for dma completion status

2013-10-25 11:16:04 +05:30

iop-adma.c

Merge commit 'dmaengine-3.13-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine

2013-11-16 12:02:36 +05:30

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

k3dma.c

dmaengine: k3dma: use DMA_COMPLETE for dma completion status

2013-10-25 11:16:07 +05:30

Kconfig

dmaengine: fix enable for high order unmap pools

2013-12-12 22:43:42 -08:00

Makefile

dmaengine: add driver for Samsung s3c24xx SoCs

2013-10-08 06:42:10 +09:00

mmp_pdma.c

dma: mmp_pdma: add missing platform_set_drvdata() in mmp_pdma_probe()

2013-11-28 13:39:11 +05:30

mmp_tdma.c

Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma

2013-11-20 13:20:24 -08:00

mpc512x_dma.c

drivers: clean-up prom.h implicit includes

2013-10-09 20:04:04 -05:00

mv_xor.c

dmaengine: mv_xor: fix oops when channels fail to initialise

2013-12-12 22:48:53 -08:00

mv_xor.h

dma: mv_xor: Fix mis-usage of mmio 'base' and 'high_base' registers

2013-11-14 11:04:42 -08:00

mxs-dma.c

dma: mxs-dma: Use semaphores for cyclic DMA

2013-11-13 15:38:31 +05:30

of-dma.c

dma: of: make error message more meaningful by adding the node name

2013-08-19 14:45:05 +05:30

omap-dma.c

dmaengine: omap: use DMA_COMPLETE for dma completion status

2013-10-25 11:16:11 +05:30

pch_dma.c

pch_dma: Add MODULE_DEVICE_TABLE

2013-09-02 11:59:58 +05:30

pl330.c

dma: pl330: ensure DMA descriptors are zero-initialised

2013-12-18 10:08:56 -08:00

s3c24xx-dma.c

dma: fix build breakage in s3c24xx-dma

2013-12-04 11:24:30 +05:30

sa11x0-dma.c

dmaengine: sa11x0: use DMA_COMPLETE for dma completion status

2013-10-25 11:16:13 +05:30

sirf-dma.c

dmaengine: sirf: add PM entries for sleep and runtime

2013-08-13 17:01:01 +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

dmaengine: ste: use DMA_COMPLETE for dma completion status

2013-10-25 11:16:15 +05:30

tegra20-apb-dma.c

dmaengine: tegra: use DMA_COMPLETE for dma completion status

2013-10-25 11:16:16 +05:30

timb_dma.c

dmaengine: remove DMA unmap from drivers

2013-11-14 11:04:38 -08:00

TODO

dmaengine: remove ste_dma40 from issue_pending TODO

2011-07-14 04:02:08 +05:30

txx9dmac.c

dma: fix build warnings in txx9

2013-12-12 22:43:41 -08:00

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