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drm/tegra: Fix reference leak when pm_runtime_get_sync() fails

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[ Upstream commit dcdfe2712b68f1e9dbf4f1a96ad59b80e5cc0ef7 ]

The PM reference count is not expected to be incremented on return in
these Tegra functions.

However, pm_runtime_get_sync() will increment the PM reference count
even on failure. Forgetting to put the reference again will result in
a leak.

Replace it with pm_runtime_resume_and_get() to keep the usage counter
balanced.

Fixes: fd67e9c6ed ("drm/tegra: Do not implement runtime PM")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Qinglang Miao
2020-12-01 20:56:31 +08:00
committed by Greg Kroah-Hartman
parent cc1c1fe795
commit 0cdfdd1f03
6 changed files with 6 additions and 6 deletions
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2
drivers/gpu/drm/tegra/dc.c
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@@ -2184,7 +2184,7 @@ static int tegra_dc_runtime_resume(struct host1x_client *client)
struct device *dev = client->dev;
int err;
err = pm_runtime_get_sync(dev);
err = pm_runtime_resume_and_get(dev);
if (err < 0) {
dev_err(dev, "failed to get runtime PM: %d\n", err);
return err;