From: wu000273@umn.edu To: kjlu@umn.edu Cc: wu000273@umn.edu, Kyungmin Park <kyungmin.park@samsung.com>, Sylwester Nawrocki <s.nawrocki@samsung.com>, Mauro Carvalho Chehab <mchehab@kernel.org>, Kukjin Kim <kgene@kernel.org>, Krzysztof Kozlowski <krzk@kernel.org>, linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] media: exynos4-is: Fix a reference count leak Date: Sat, 13 Jun 2020 22:01:11 -0500 [thread overview] Message-ID: <20200614030111.28843-1-wu000273@umn.edu> (raw) From: Qiushi Wu <wu000273@umn.edu> 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> --- 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 540151bbf58f..1aac167abb17 100644 --- a/drivers/media/platform/exynos4-is/mipi-csis.c +++ b/drivers/media/platform/exynos4-is/mipi-csis.c @@ -510,8 +510,10 @@ 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); -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: wu000273@umn.edu To: kjlu@umn.edu Cc: linux-samsung-soc@vger.kernel.org, wu000273@umn.edu, linux-kernel@vger.kernel.org, Krzysztof Kozlowski <krzk@kernel.org>, Kyungmin Park <kyungmin.park@samsung.com>, Kukjin Kim <kgene@kernel.org>, Sylwester Nawrocki <s.nawrocki@samsung.com>, Mauro Carvalho Chehab <mchehab@kernel.org>, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org Subject: [PATCH] media: exynos4-is: Fix a reference count leak Date: Sat, 13 Jun 2020 22:01:11 -0500 [thread overview] Message-ID: <20200614030111.28843-1-wu000273@umn.edu> (raw) From: Qiushi Wu <wu000273@umn.edu> 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> --- 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 540151bbf58f..1aac167abb17 100644 --- a/drivers/media/platform/exynos4-is/mipi-csis.c +++ b/drivers/media/platform/exynos4-is/mipi-csis.c @@ -510,8 +510,10 @@ 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); -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2020-06-14 3:01 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-06-14 3:01 wu000273 [this message] 2020-06-14 3:01 ` [PATCH] media: exynos4-is: Fix a reference count leak wu000273
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