ASoC: qcom: q6apm-dai: fix race condition while updating the position pointer
authorSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Thu, 9 Feb 2023 12:28:00 +0000 (12:28 +0000)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 10 Mar 2023 08:33:21 +0000 (09:33 +0100)
commitcd57b2898a81e232db419e1fe892f6b188031e48
treef9026ebd7d444f4edefba3fea09f02966ebddef8
parent91b7ce0cfff7e17a8f259e8b4da32a31e7450d5b
ASoC: qcom: q6apm-dai: fix race condition while updating the position pointer

[ Upstream commit 84222ef54bfd8f043c23c8603fd5257a64b00780 ]

It is noticed that the position pointer value seems to get a get corrupted
due to missing locking between updating and reading.

Fix this by adding a spinlock around the position pointer.

Fixes: 9b4fe0f1cd79 ("ASoC: qdsp6: audioreach: add q6apm-dai support")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20230209122806.18923-3-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
sound/soc/qcom/qdsp6/q6apm-dai.c