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| author |   Sebastian von Ohr <vonohr@smaract.com> | 2020-03-03 14:05:18 +0100 |
|---|---|---|
| committer |   Vinod Koul <vkoul@kernel.org> | 2020-04-15 21:42:11 +0530 |
| commit | b269426011bcfd97b7c3101abfe1a99147b6f40b (patch) | |
| tree | 96e729dae0ec64fd5aa4dfff5de6f9975ed9c7ad /include/linux/dmaengine.h | |
| parent | dmaengine: ti: k3-psil: fix deadlock on error path (diff) | |
| download | wireguard-linux-b269426011bcfd97b7c3101abfe1a99147b6f40b.tar.xz wireguard-linux-b269426011bcfd97b7c3101abfe1a99147b6f40b.zip | |
dmaengine: xilinx_dma: Add missing check for empty list
The DMA transfer might finish just after checking the state with
dma_cookie_status, but before the lock is acquired. Not checking
for an empty list in xilinx_dma_tx_status may result in reading
random data or data corruption when desc is written to. This can
be reliably triggered by using dma_sync_wait to wait for DMA
completion.
Signed-off-by: Sebastian von Ohr <vonohr@smaract.com>
Tested-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Link: https://lore.kernel.org/r/20200303130518.333-1-vonohr@smaract.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'include/linux/dmaengine.h')
0 files changed, 0 insertions, 0 deletions