V4L/DVB (9875): gspca - main: Fix vidioc_s_jpegcomp locking.

Signed-off-by: Jim Paris <jim@jtan.com>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index 748a87e82e44..02a6e9ef0337 100644
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -1264,10 +1264,10 @@ static int vidioc_s_jpegcomp(struct file *file, void *priv,
         struct gspca_dev *gspca_dev = priv;
         int ret;
 
-        if (mutex_lock_interruptible(&gspca_dev->usb_lock))
-                return -ERESTARTSYS;
         if (!gspca_dev->sd_desc->set_jcomp)
                 return -EINVAL;
+        if (mutex_lock_interruptible(&gspca_dev->usb_lock))
+                return -ERESTARTSYS;
         ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
         mutex_unlock(&gspca_dev->usb_lock);
         return ret;