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341198eda7
linux/drivers/dma
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Leonid Iziumtsev 341198eda7 dmaengine: imx-dma: fix wrong callback invoke 
Once the "ld_queue" list is not empty, next descriptor will migrate
into "ld_active" list. The "desc" variable will be overwritten
during that transition. And later the dmaengine_desc_get_callback_invoke()
will use it as an argument. As result we invoke wrong callback.

That behaviour was in place since:
commit fcaaba6c71 ("dmaengine: imx-dma: fix callback path in tasklet").
But after commit 4cd13c21b2 ("softirq: Let ksoftirqd do its job")
things got worse, since possible delay between tasklet_schedule()
from DMA irq handler and actual tasklet function execution got bigger.
And that gave more time for new DMA request to be submitted and
to be put into "ld_queue" list.

It has been noticed that DMA issue is causing problems for "mxc-mmc"
driver. While stressing the system with heavy network traffic and
writing/reading to/from sd card simultaneously the timeout may happen:

10013000.sdhci: mxcmci_watchdog: read time out (status = 0x30004900)

That often lead to file system corruption.

Signed-off-by: Leonid Iziumtsev <leonid.iziumtsev@gmail.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Cc: stable@vger.kernel.org
2019-02-04 12:35:12 +05:30
..
bestcomm treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
dw dmaengine-4.21-rc1 2019-01-01 15:45:48 -08:00
dw-axi-dmac dmaengine: dw-axi-dmac: use dmaenginem_async_device_register to simplify the code 2018-08-29 21:43:17 +05:30
hsu dmaengine: hsu: remove dma_slave_config direction usage 2018-10-07 19:25:09 +05:30
ioat pci-v4.20-changes 2018-10-25 06:50:48 -07:00
ipu treewide: Use array_size() in vmalloc() 2018-06-12 16:19:22 -07:00
mediatek dmaengine: mediatek: Add MediaTek Command-Queue DMA controller for MT6765 SoC 2018-11-11 15:15:18 +05:30
ppc4xx dmaengine: ppc4xx: fix off-by-one build failure 2018-10-16 20:08:30 +05:30
qcom dmaengine: qcom_hidma: convert to DEFINE_SHOW_ATTRIBUTE 2018-12-17 11:49:41 +05:30
sh IOMMU Updates for Linux v4.21 2019-01-01 15:55:29 -08:00
ti dmaengine: cppi41: delete channel from pending list when stop channel 2018-12-05 14:01:59 +05:30
xilinx Merge branch 'topic/xilinx' into for-linus 2018-12-31 19:32:32 +05:30
acpi-dma.c dmaengine: acpi-dma: align debug message with flow 2016-02-22 09:06:09 +05:30
altera-msgdma.c dmaengine: altera: Use IRQ-safe spinlock calls in the error paths as well 2017-10-20 11:51:10 +05:30
amba-pl08x.c dmaengine: amba-pl08x: convert to DEFINE_SHOW_ATTRIBUTE 2018-12-17 11:49:41 +05:30
at_hdmac_regs.h dmaengine: at_hdmac: Remove unnecessary 0x prefixes before %pad 2017-11-08 10:47:04 +05:30
at_hdmac.c dmaengine: at_hdmac: fix module unloading 2018-11-29 19:49:41 +05:30
at_xdmac.c dmaengine: at_xdmac: Fix wrongfull report of a channel as in use 2019-02-02 15:55:26 +05:30
bcm2835-dma.c dmaengine: bcm2835: Switch to SPDX identifier 2018-11-11 14:42:19 +05:30
bcm-sba-raid.c treewide: Use struct_size() for devm_kmalloc() and friends 2018-06-06 11:15:43 -07:00
coh901318_lli.c dmaengine: coh901318: use NULL for pointer initialization 2016-09-26 22:28:24 +05:30
coh901318.c dmaengine: coh901318: Remove unused variable 2018-11-26 13:35:52 +05:30
coh901318.h
dma-axi-dmac.c dmaengine: axi-dmac: Request IRQ with IRQF_SHARED 2018-05-02 10:06:42 +05:30
dma-jz4740.c dmaengine: jz4740: remove dma_slave_config direction usage 2018-10-07 19:20:14 +05:30
dma-jz4780.c Merge branch 'topic/jz' into for-linus 2018-10-24 09:16:04 +01:00
dmaengine.c Merge branch 'ida-4.19' of git://git.infradead.org/users/willy/linux-dax 2018-08-26 11:48:42 -07:00
dmaengine.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dmatest.c dmaengine: dmatest: Add transfer_size parameter 2018-12-17 11:45:11 +05:30
ep93xx_dma.c dmaengine: ep93xx: fix some typo 2018-11-11 14:56:49 +05:30
fsl_raid.c dmaengine: fsl_raid: make of_device_ids const. 2017-06-29 09:25:28 +05:30
fsl_raid.h
fsl-edma-common.c dmaengine: fsl-edma: remove dma_slave_config direction usage 2018-10-09 14:29:58 +05:30
fsl-edma-common.h dmaengine: fsl-edma: remove dma_slave_config direction usage 2018-10-09 14:29:58 +05:30
fsl-edma.c dmaengine: fsl-edma: add edma version and configurable registers 2018-09-11 12:06:39 +05:30
fsldma.c dmaengine: fsldma: move spin_lock_bh to spin_lock in tasklet 2018-09-03 16:23:00 +05:30
fsldma.h dmaengine: fsldma: set BWC, DAHTS and SAHTS values correctly 2017-06-22 18:31:35 +05:30
idma64.c Merge branch 'topic/intel' into for-linus 2018-10-24 09:15:59 +01:00
idma64.h asm-generic changes for 4.6 2016-03-24 23:13:48 -07:00
img-mdc-dma.c dmaengine: img-mdc-dma: Use vchan_terminate_vdesc() instead of desc_free 2017-12-04 22:33:51 +05:30
imx-dma.c dmaengine: imx-dma: fix wrong callback invoke 2019-02-04 12:35:12 +05:30
imx-sdma.c dmaengine-4.21-rc1 2019-01-01 15:45:48 -08:00
iop-adma.c dmaengine: iop-adma: convert callback to helper function 2016-08-08 08:11:39 +05:30
k3dma.c dmaengine: k3dma: remove dma_slave_config direction usage 2018-10-07 19:25:10 +05:30
Kconfig dmaengine: uniphier-mdmac: add UniPhier MIO DMAC driver 2018-11-24 19:42:59 +05:30
lpc18xx-dmamux.c
Makefile dmaengine: uniphier-mdmac: add UniPhier MIO DMAC driver 2018-11-24 19:42:59 +05:30
mcf-edma.c dmaengine: mcf-edma: avoid warning for wrong pointer cast 2018-09-18 12:15:45 -07:00
mic_x100_dma.c dmaengine: mic_x100_dma: convert to DEFINE_SHOW_ATTRIBUTE 2018-12-17 11:49:41 +05:30
mic_x100_dma.h
mmp_pdma.c dmaengine: mmp_pdma: remove dma_slave_config direction usage 2018-11-05 10:32:46 +05:30
mmp_tdma.c Merge branch 'topic/dmam' into for-linus 2018-10-24 09:15:43 +01:00
moxart-dma.c treewide: Use struct_size() for kmalloc()-family 2018-06-06 11:15:43 -07:00
mpc512x_dma.c Merge branch 'topic/err_reporting' into for-linus 2016-10-03 09:17:33 +05:30
mv_xor_v2.c dmaengine: mv_xor_v2: use {lower,upper}_32_bits to configure HW descriptor address 2018-07-25 17:53:22 +05:30
mv_xor.c dmaengine: mv_xor: move spin_lock_bh to spin_lock in tasklet 2018-09-03 16:23:31 +05:30
mv_xor.h dmaengine: mv_xor: Add support for scatter-gather DMA mode 2016-11-25 11:16:36 +05:30
mxs-dma.c dmaengine: mxs-dma: use dmaenginem_async_device_register to simplify the code 2018-08-29 21:43:18 +05:30
nbpfaxi.c Merge branch 'topic/renesas' into for-linus 2018-10-24 09:16:22 +01:00
of-dma.c dmaengine: Convert to using %pOF instead of full_name 2017-07-19 09:30:44 +05:30
owl-dma.c dmaengine: owl: Fix warnings generated during build 2018-10-15 22:39:16 +05:30
pch_dma.c dmaengine: pch_dma: Replace PCI pool old API 2017-10-31 17:01:06 +05:30
pl330.c dmaengine: pl330: remove dma_slave_config direction usage 2018-11-24 20:22:21 +05:30
pxa_dma.c dmaengine-4.21-rc1 2019-01-01 15:45:48 -08:00
s3c24xx-dma.c headers: separate linux/mod_devicetable.h from linux/platform_device.h 2018-07-07 17:52:26 +02:00
sa11x0-dma.c dmaengine: sa11x0: unexport sa11x0_dma_filter_fn and clean up 2018-11-11 14:54:08 +05:30
sirf-dma.c dmaengine: sirf-dma: remove unused ‘sdesc’ 2016-12-12 22:25:22 +05:30
sprd-dma.c dmaengine: sprd: Add me as one of the module authors 2018-12-05 14:27:12 +05:30
st_fdma.c dmaengine: st_fdma: use dmaenginem_async_device_register to simplify the code 2018-08-29 21:43:17 +05:30
st_fdma.h dmaengine: st_fdma: Add STMicroelectronics FDMA driver header file 2016-10-18 20:12:06 +05:30
ste_dma40_ll.c dmaengine: ste_dma40_ll: make d40_width_to_bits static 2016-06-08 08:59:55 +05:30
ste_dma40_ll.h
ste_dma40.c dmaengine: ste_dma40: remove dma_slave_config direction usage 2018-11-24 20:22:21 +05:30
stm32-dma.c dmaengine: stm32-dma: check whether length is aligned on FIFO threshold 2018-10-02 20:32:15 +05:30
stm32-dmamux.c dmaengine: stm32-dmamux: fix a potential buffer overflow 2018-03-22 10:51:35 +05:30
stm32-mdma.c dmaengine: stm32-mdma: use dmaenginem_async_device_register to simplify the code 2018-08-29 21:43:17 +05:30
sun4i-dma.c dmaengine: sun4i: fix invalid argument 2017-04-24 09:50:05 +05:30
sun6i-dma.c dmaengine: sun6i: Retrieve channel count/max request from devicetree 2017-10-23 11:44:03 +05:30
tegra20-apb-dma.c dmaengine: tegra-apb: Support non-flow controlled slave configuration 2017-11-29 19:35:05 +05:30
tegra210-adma.c dmaengine: tegra210-adma: fix of_irq_get() error check 2017-08-09 11:39:16 +05:30
timb_dma.c dmaengine: timb_dma: Use proper enum in td_prep_slave_sg 2018-10-02 20:11:09 +05:30
TODO
txx9dmac.c dmaengine: txx9dmac: simplify getting .drvdata 2018-04-22 21:38:06 +05:30
txx9dmac.h
uniphier-mdmac.c dmaengine: uniphier-mdmac: add UniPhier MIO DMAC driver 2018-11-24 19:42:59 +05:30
virt-dma.c dmaengine: virt-dma: Add helper to free/reuse a descriptor 2017-12-04 22:33:51 +05:30
virt-dma.h dmaengine: virt-dma: Support for race free transfer termination 2017-12-04 22:33:51 +05:30
xgene-dma.c dmaengine: xgene-dma: remove unused xgene_dma_invalidate_buffer 2017-08-22 22:13:44 +05:30
zx_dma.c treewide: devm_kzalloc() -> devm_kcalloc() 2018-06-12 16:19:22 -07:00