[PATCH AUTOSEL 4.14 05/52] media: sti: Fix reference count leaks

Sasha Levin
2020-10-18T19:25:41Z

From: Qiushi Wu <wu000273@umn.edu>

[ Upstream commit 6f4432bae9f2d12fc1815b5e26cc07e69bcad0df ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/media/platform/sti/hva/hva-hw.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/media/platform/sti/hva/hva-hw.c b/drivers/media/platform/sti/hva/hva-hw.c
index ec25bdcfa3d1e..8dce2ccc551cb 100644
--- a/drivers/media/platform/sti/hva/hva-hw.c
+++ b/drivers/media/platform/sti/hva/hva-hw.c
@@ -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;
}
@@ -557,6 +558,7 @@ 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;
}
--
2.25.1