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Date: Tue, 27 Oct 2020 14:49:58 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Qiushi Wu <wu000273@....edu>, Hans Verkuil <hverkuil-cisco@...all.nl>, Mauro Carvalho Chehab <mchehab+huawei@...nel.org>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 4.14 143/191] media: exynos4-is: Fix a reference count leak From: Qiushi Wu <wu000273@....edu> [ Upstream commit 64157b2cb1940449e7df2670e85781c690266588 ] 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@....edu> Signed-off-by: Hans Verkuil <hverkuil-cisco@...all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/media/platform/exynos4-is/mipi-csis.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/media/platform/exynos4-is/mipi-csis.c b/drivers/media/platform/exynos4-is/mipi-csis.c index 560aadabcb111..040d10df17c97 100644 --- a/drivers/media/platform/exynos4-is/mipi-csis.c +++ b/drivers/media/platform/exynos4-is/mipi-csis.c @@ -513,8 +513,10 @@ static int s5pcsis_s_stream(struct v4l2_subdev *sd, int enable) if (enable) { s5pcsis_clear_counters(state); ret = pm_runtime_get_sync(&state->pdev->dev); - if (ret && ret != 1) + if (ret && ret != 1) { + pm_runtime_put_noidle(&state->pdev->dev); return ret; + } } mutex_lock(&state->lock); -- 2.25.1
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