raspi/linux
1
0
Fork 1
mirror of https://github.com/raspberrypi/linux.git synced 2025-12-06 10:00:17 +00:00
Code Issues Projects Releases Wiki Activity

remoteproc: qcom: q6v5: Avoid disabling handover IRQ twice

Browse Source 
enable_irq() and disable_irq() are reference counted, so we must make sure
that each enable_irq() is always paired with a single disable_irq(). If we
call disable_irq() twice followed by just a single enable_irq(), the IRQ
will remain disabled forever.

For the error handling path in qcom_q6v5_wait_for_start(), disable_irq()
will end up being called twice, because disable_irq() also happens in
qcom_q6v5_unprepare() when rolling back the call to qcom_q6v5_prepare().

Fix this by dropping disable_irq() in qcom_q6v5_wait_for_start(). Since
qcom_q6v5_prepare() is the function that calls enable_irq(), it makes more
sense to have the rollback handled always by qcom_q6v5_unprepare().

Fixes: 3b415c8fb2 ("remoteproc: q6v5: Extract common resource handling")
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Stephan Gerhold <stephan.gerhold@linaro.org>
Link: https://lore.kernel.org/r/20250820-rproc-qcom-q6v5-fixes-v2-1-910b1a3aff71@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
This commit is contained in:
Stephan Gerhold
2025-08-20 18:02:33 +02:00
committed by Bjorn Andersson
parent ef575ff205
commit 110be46f5a
1 changed files with 0 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/remoteproc/qcom_q6v5.c
View File

@@ -156,9 +156,6 @@ int qcom_q6v5_wait_for_start(struct qcom_q6v5 *q6v5, int timeout)
int ret; int ret;
ret = wait_for_completion_timeout(&q6v5->start_done, timeout); ret = wait_for_completion_timeout(&q6v5->start_done, timeout);
if (!ret)
disable_irq(q6v5->handover_irq);
return !ret ? -ETIMEDOUT : 0; return !ret ? -ETIMEDOUT : 0;
} }
EXPORT_SYMBOL_GPL(qcom_q6v5_wait_for_start); EXPORT_SYMBOL_GPL(qcom_q6v5_wait_for_start);