linux-kernel - [PATCH] usbvision: fix locking error

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Message-Id: <1454342370-14609-1-git-send-email-wuninsu@gmail.com>
Date:	Mon,  1 Feb 2016 10:59:30 -0500
From:	Insu Yun <wuninsu@...il.com>
To:	hverkuil@...all.nl, mchehab@....samsung.com, khoroshilov@...ras.ru,
	arnd@...db.de, vdronov@...hat.com, oneukum@...e.com,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	taesoo@...ech.edu, yeongjin.jang@...ech.edu, insu@...ech.edu,
	changwoo@...ech.edu, Insu Yun <wuninsu@...il.com>
Subject: [PATCH] usbvision: fix locking error

When remove_pending is non-zero, v4l2_lock is never unlocked.

Signed-off-by: Insu Yun <wuninsu@...il.com>
---
 drivers/media/usb/usbvision/usbvision-video.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/usb/usbvision/usbvision-video.c b/drivers/media/usb/usbvision/usbvision-video.c
index de9ff3b..75d06ea 100644
--- a/drivers/media/usb/usbvision/usbvision-video.c
+++ b/drivers/media/usb/usbvision/usbvision-video.c
@@ -1156,6 +1156,7 @@ static int usbvision_radio_close(struct file *file)
 	usbvision_audio_off(usbvision);
 	usbvision->radio = 0;
 	usbvision->user--;
+	mutex_unlock(&usbvision->v4l2_lock);
 
 	if (usbvision->remove_pending) {
 		printk(KERN_INFO "%s: Final disconnect\n", __func__);
@@ -1164,7 +1165,6 @@ static int usbvision_radio_close(struct file *file)
 		return 0;
 	}
 
-	mutex_unlock(&usbvision->v4l2_lock);
 	PDEBUG(DBG_IO, "success");
 	return v4l2_fh_release(file);
 }
-- 
1.9.1