From: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
Add the missing unlock before return from function rpmsg_eptdev_read()
in the error handling case.
Fixes: c0cdc19f84a4 ("rpmsg: Driver for user space endpoint interface")
Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
---
drivers/rpmsg/rpmsg_char.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c
index a78b6b7..93252dc 100644
--- a/drivers/rpmsg/rpmsg_char.c
+++ b/drivers/rpmsg/rpmsg_char.c
@@ -209,11 +209,12 @@ static ssize_t rpmsg_eptdev_read(struct file *filp, char __user *buf,
}
skb = skb_dequeue(&eptdev->queue);
- if (!skb)
- return -EFAULT;
spin_unlock_irqrestore(&eptdev->queue_lock, flags);
+ if (!skb)
+ return -EFAULT;
+
use = min_t(size_t, len, skb->len);
if (copy_to_user(buf, skb->data, use))
use = -EFAULT;
--
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