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media: s5p-mfc: Fix a reference count leak 

pm_runtime_get_sync() increments the runtime PM usage counter even
when it returns an error code, causing incorrect ref count if
pm_runtime_put_noidle() is not called in error handling paths.
Thus call pm_runtime_put_noidle() if pm_runtime_get_sync() fails.

Fixes: c5086f130a ("[media] s5p-mfc: Use clock gating only on MFC v5 hardware")
Signed-off-by: Qiushi Wu <wu000273@umn.edu>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Qiushi Wu 2020-06-14 04:31:22 +02:00 committed by Mauro Carvalho Chehab
parent d0675b67b4
commit 78741ce98c
1 changed files with 3 additions and 1 deletions
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4
drivers/media/platform/s5p-mfc/s5p_mfc_pm.c
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@ -79,8 +79,10 @@ int s5p_mfc_power_on(void)
int i, ret = 0;
ret = pm_runtime_get_sync(pm->device);
if (ret < 0)
if (ret < 0) {
pm_runtime_put_noidle(pm->device);
return ret;
}
/* clock control */
for (i = 0; i < pm->num_clocks; i++) {