From: wu000273@umn.edu
To: kjlu@umn.edu
Cc: wu000273@umn.edu,
Jean-Christophe Trotin <jean-christophe.trotin@st.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
linux-media@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] media: sti: Fix reference count leaks
Date: Sat, 13 Jun 2020 22:31:06 -0500 [thread overview]
Message-ID: <20200614033106.426-1-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/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 401aaafa1710..bb13348be083 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;
}
@@ -553,6 +554,7 @@ 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;
}
--
2.17.1
next reply other threads:[~2020-06-14 3:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-14 3:31 wu000273 [this message]
2020-09-17 11:40 ` [PATCH] media: sti: Fix reference count leaks Hans Verkuil
2021-04-21 13:29 ` Krzysztof Kozlowski
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