accel/qaic: Synchronize access to DBC request queue head & tail pointer

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[ Upstream commit 52e59f7740 ]

Two threads of the same process can potential read and write parallelly to
head and tail pointers of the same DBC request queue. This could lead to a
race condition and corrupt the DBC request queue.

Fixes: ff13be8303 ("accel/qaic: Add datapath")
Signed-off-by: Pranjal Ramajor Asha Kanojiya <quic_pkanojiy@quicinc.com>
Signed-off-by: Youssef Samir <youssef.abdulrahman@oss.qualcomm.com>
Reviewed-by: Jeff Hugo <jeff.hugo@oss.qualcomm.com>
Reviewed-by: Carl Vanderlip <carl.vanderlip@oss.qualcomm.com>
[jhugo: Add fixes tag]
Signed-off-by: Jeff Hugo <jeff.hugo@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20251007061837.206132-1-youssef.abdulrahman@oss.qualcomm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Pranjal Ramajor Asha Kanojiya 2025-10-07 08:18:37 +02:00 • committed by Greg Kroah-Hartman

parent 551f1dfbcb

commit 21ba0445e4

3 changed files with 15 additions and 2 deletions

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2

drivers/accel/qaic/qaic.h

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12

drivers/accel/qaic/qaic_data.c

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3

drivers/accel/qaic/qaic_drv.c

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