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media: sti: Fix reference count leaks

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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.

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 05:31:06 +02:00 committed by Mauro Carvalho Chehab
parent 7ef64ceea0
commit 6f4432bae9
1 changed files with 2 additions and 0 deletions
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2
drivers/media/platform/sti/hva/hva-hw.c
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@ -272,6 +272,7 @@ static unsigned long int hva_hw_get_ip_version(struct hva_dev *hva)
if (pm_runtime_get_sync(dev) < 0) {
dev_err(dev, "%s failed to get pm_runtime\n", HVA_PREFIX);
pm_runtime_put_noidle(dev);
mutex_unlock(&hva->protect_mutex);
return -EFAULT;
}
@ -553,6 +554,7 @@ void hva_hw_dump_regs(struct hva_dev *hva, struct seq_file *s)
if (pm_runtime_get_sync(dev) < 0) {
seq_puts(s, "Cannot wake up IP\n");
pm_runtime_put_noidle(dev);
mutex_unlock(&hva->protect_mutex);
return;
}