iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
linux/drivers/dma
History
Andy Shevchenko aa72f1d20e dmaengine: dmatest: Fix process hang when reading 'wait' parameter 
If we do

  % echo 1 > /sys/module/dmatest/parameters/run
  [  115.851124] dmatest: Could not start test, no channels configured

  % echo dma8chan7 > /sys/module/dmatest/parameters/channel
  [  127.563872] dmatest: Added 1 threads using dma8chan7

  % cat /sys/module/dmatest/parameters/wait
  ... !!! HANG !!! ...

The culprit is the commit 6138f967bccc

  ("dmaengine: dmatest: Use fixed point div to calculate iops")

which makes threads not to run, but pending and being kicked off by writing
to the 'run' node. However, it forgot to consider 'wait' routine to avoid
above mentioned case.

In order to fix this, check for really running threads, i.e. with pending
and done flags unset.

It's pity the culprit commit hadn't updated documentation and tested all
possible scenarios.

Fixes: 6138f967bccc ("dmaengine: dmatest: Use fixed point div to calculate iops")
Cc: Seraj Alijan <seraj.alijan@sondrel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200428113518.70620-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-04-28 21:46:35 +05:30
..
bestcomm
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
dw
dmaengine: dw: platform: Mark 'hclk' clock optional
2019-10-14 13:51:44 +05:30
dw-axi-dmac
dmaengine: virt-dma: Add missing locking
2019-12-26 10:04:18 +05:30
dw-edma
dmaengine: dw-edma: fix endianess confusion
2019-07-22 20:58:15 +05:30
fsl-dpaa2-qdma
dmaengine: fsl-dpaa2-qdma: remove set but not used variable 'dpaa2_qdma'
2020-03-06 19:04:55 +05:30
hsu
dmaengine updates for v5.3-rc1
2019-07-17 09:55:43 -07:00
idxd
dmaengine updates for v5.7-rc1
2020-04-02 16:04:42 -07:00
ioat
dmanegine: ioat/dca: Replace zero-length array with flexible-array member
2020-02-19 17:48:40 +05:30
ipu
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
mediatek
dmaengine: virt-dma: Add missing locking
2019-12-26 10:04:18 +05:30
ppc4xx
dmaengine: ppc4xx: Use scnprintf() for avoiding potential buffer overflow
2020-03-11 15:10:45 +05:30
qcom
dmaengine: qcom: bam_dma: Fix resource leak
2019-10-18 13:27:58 +05:30
sf-pdma
dmaengine: virt-dma: Add missing locking
2019-12-26 10:04:18 +05:30
sh
dmaengine: fix spelling mistake "exceds" -> "exceeds"
2020-03-23 11:39:49 +05:30
ti
dmaengine: ti: k3-psil: fix deadlock on error path
2020-04-15 21:38:28 +05:30
xilinx
dmaengine: xilinx_dma: Add missing check for empty list
2020-04-15 21:42:11 +05:30
acpi-dma.c
dmaengine: acpi: Add kernel doc parameter descriptions
2019-08-21 09:41:27 +05:30
altera-msgdma.c
remove ioremap_nocache and devm_ioremap_nocache
2020-01-06 09:45:59 +01:00
amba-pl08x.c
dmaengine updates for v5.3-rc1
2019-07-17 09:55:43 -07:00
at_hdmac_regs.h
dmaengine: at_hdmac: Return err in case the chan is not free at alloc res time
2020-02-25 11:27:27 +05:30
at_hdmac.c
dmaengine: at_hdmac: Fix deadlocks
2020-02-25 11:27:27 +05:30
at_xdmac.c
dmaengine: at_xdmac: Fix locking in tasklet
2020-02-25 11:27:27 +05:30
bcm2835-dma.c
dmaengine: bcm2835: do not call vchan_vdesc_fini() with lock held
2019-12-26 10:04:18 +05:30
bcm-sba-raid.c
dmaengine: bcm-sba-raid: Replace zero-length array with flexible-array member
2020-02-13 20:15:35 +05:30
coh901318_lli.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194
2019-05-30 11:29:22 -07:00
coh901318.c
dmaengine: coh901318: Fix a double lock bug in dma_tc_handle()
2020-02-24 21:59:45 +05:30
coh901318.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194
2019-05-30 11:29:22 -07:00
dma-axi-dmac.c
dmaengine: axi-dmac: add a check for devm_regmap_init_mmio
2019-12-11 16:11:50 +05:30
dma-jz4780.c
dmaengine updates for v5.6-rc1
2020-01-27 10:55:50 -08:00
dmaengine.c
dmaengine: fix channel index enumeration
2020-04-27 21:26:23 +05:30
dmaengine.h
dmaengine: Create debug directories for DMA devices
2020-03-11 14:56:14 +05:30
dmatest.c
dmaengine: dmatest: Fix process hang when reading 'wait' parameter
2020-04-28 21:46:35 +05:30
ep93xx_dma.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
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: Add eDMA support for QorIQ LS1028A platform
2019-12-18 11:55:46 +05:30
fsl-edma-common.h
dmaengine: fsl-edma: Add eDMA support for QorIQ LS1028A platform
2019-12-18 11:55:46 +05:30
fsl-edma.c
dmaengine: fsl-edma: Add eDMA support for QorIQ LS1028A platform
2019-12-18 11:55:46 +05:30
fsl-qdma.c
dmaengine: fsl-qdma: fix duplicated argument to &&
2020-01-21 13:15:37 +05:30
fsldma.c
dmaengine: fsldma: Mark expected switch fall-through
2019-08-20 19:42:34 -05:00
fsldma.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 40
2019-05-24 17:27:12 +02:00
hisi_dma.c
dmaengine: hisilicon: Add Kunpeng DMA engine support
2020-01-24 11:18:45 +05:30
idma64.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
idma64.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
img-mdc-dma.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 422
2019-06-05 17:37:15 +02:00
imx-dma.c
dmaengine: imx-dma: Mark expected switch fall-through
2019-07-31 20:49:04 +05:30
imx-sdma.c
dmaengine: imx-sdma: Fix the event id check to include RX event for UART6
2020-02-25 14:15:26 +05:30
iop-adma.c
dmaengine: iop-adma: clean up an indentation issue
2019-11-14 10:27:37 +05:30
iop-adma.h
dma: iop-adma: allow building without platform headers
2019-08-14 15:36:22 +02:00
k3dma.c
dmaengine: k3dma: Avoid null pointer traversal
2019-12-23 13:21:14 +05:30
Kconfig
dmaengine: hisilicon: Fix build error without PCI_MSI
2020-04-15 21:18:57 +05:30
lpc18xx-dmamux.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
Makefile
dmaengine: uniphier-xdmac: Add UniPhier external DMA controller driver
2020-03-02 14:54:34 +05:30
mcf-edma.c
dmaengine: fsl-edma: add drvdata for fsl-edma
2019-07-03 13:28:22 +05:30
mic_x100_dma.c
dmaengine updates for v5.3-rc1
2019-07-17 09:55:43 -07:00
mic_x100_dma.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 290
2019-06-05 17:36:38 +02:00
milbeaut-hdmac.c
dmaengine: milbeaut-hdmac: remove redundant error log
2019-11-08 09:26:17 +05:30
milbeaut-xdmac.c
dmaengine: milbeaut-xdmac: remove redundant error log
2019-11-08 09:26:17 +05:30
mmp_pdma.c
dmaengine: mmp_pdma: add missed of_dma_controller_free
2019-11-22 10:51:30 +05:30
mmp_tdma.c
dmaengine: mmp_tdma: Reset channel error on release
2020-04-23 12:44:30 +05:30
moxart-dma.c
treewide: Use struct_size() for kmalloc()-family
2018-06-06 11:15:43 -07:00
mpc512x_dma.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 7
2019-05-21 11:28:40 +02:00
mv_xor_v2.c
treewide: remove redundant IS_ERR() before error code check
2020-02-04 03:05:27 +00:00
mv_xor.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288
2019-06-05 17:36:37 +02:00
mv_xor.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288
2019-06-05 17:36:37 +02:00
mxs-dma.c
dmaengine updates for v5.3-rc1
2019-07-17 09:55:43 -07:00
nbpfaxi.c
dmaengine: nbpfaxi: Use dev_get_drvdata()
2019-04-29 10:47:15 +05:30
of-dma.c
dmaengine: Move dma_get_{,any_}slave_channel() to private dmaengine.h
2020-01-21 15:05:29 +05:30
owl-dma.c
dmaengine: virt-dma: Add missing locking
2019-12-26 10:04:18 +05:30
pch_dma.c
dmaengine: pch_dma.c: Avoid data race between probe and irq handler
2020-04-23 11:47:16 +05:30
pl330.c
dmaengine: pl330: Convert to the *_late and *_early system sleep callbacks
2019-12-10 11:39:04 +05:30
plx_dma.c
dmaengine: plx-dma: Implement descriptor submission
2020-01-15 19:40:51 +05:30
pxa_dma.c
dmaengine updates for v5.3-rc1
2019-07-17 09:55:43 -07:00
s3c24xx-dma.c
dmaengine: s3c24xx-dma: fix spelling mistake "to" -> "too"
2020-01-23 17:03:25 +05:30
sa11x0-dma.c
dmaengine: sa11x0: Replace zero-length array with flexible-array member
2020-02-19 17:48:40 +05:30
sirf-dma.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 4
2019-05-21 11:28:40 +02:00
sprd-dma.c
dmaengine: sprd: Set request pending flag when DMA controller is active
2020-03-23 11:38:24 +05:30
st_fdma.c
dmaengine: Remove dev_err() usage after platform_get_irq()
2019-07-31 20:50:53 +05:30
st_fdma.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
ste_dma40_ll.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194
2019-05-30 11:29:22 -07:00
ste_dma40_ll.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194
2019-05-30 11:29:22 -07:00
ste_dma40.c
dmaengine: ste_dma40: fix unneeded variable warning
2019-07-22 20:58:33 +05:30
stm32-dma.c
dmaengine: stm32-dma: use vchan_terminate_vdesc() in .terminate_all
2020-02-25 11:15:05 +05:30
stm32-dmamux.c
dmaengine: stm32-dmamux: driver defers probe for clock and reset
2020-02-24 22:22:44 +05:30
stm32-mdma.c
dmaengine: stm32-mdma: use vchan_terminate_vdesc() in .terminate_all
2020-02-24 22:20:01 +05:30
sun4i-dma.c
dmaengine: sun4i: set the linear_mode properly
2020-02-17 12:21:08 +05:30
sun6i-dma.c
dmaengine: Remove dev_err() usage after platform_get_irq()
2019-07-31 20:50:53 +05:30
tegra20-apb-dma.c
dmaengine: tegra-apb: Ensure that clock is enabled during of DMA synchronization
2020-04-27 21:35:35 +05:30
tegra210-adma.c
dmaengine: tegra210-adma: Replace zero-length array with flexible-array member
2020-02-19 17:48:40 +05:30
timb_dma.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174
2019-05-30 11:26:41 -07:00
TODO
…
txx9dmac.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
txx9dmac.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
uniphier-mdmac.c
dmaengine: uniphier-mdmac: replace zero-length array with flexible-array member
2020-02-13 20:15:57 +05:30
uniphier-xdmac.c
dmaengine: uniphier-xdmac: Remove redandant error log for platform_get_irq
2020-03-26 12:22:56 +05:30
virt-dma.c
dmaengine updates for v5.6-rc1
2020-01-27 10:55:50 -08:00
virt-dma.h
dmaengine: virt-dma: Add missing locking around list operations
2019-12-26 10:04:18 +05:30
xgene-dma.c
dmaengine: Remove dev_err() usage after platform_get_irq()
2019-07-31 20:50:53 +05:30
zx_dma.c
dmaengine: zx: remove: removed dmam_pool_destroy
2019-11-14 12:16:53 +05:30