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Date: Tue, 27 Oct 2020 14:54:29 +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 4.19 211/264] media: sti: Fix reference count leaks From: Qiushi Wu <wu000273@....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@....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/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 7917fd2c4bd4b..166ed30bbfce5 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
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