media: omap_vout: Fix a possible null pointer dereference in omap_vout_open()

Move a debug message so that a null pointer access can not happen
for the variable "vout" in this function.

Fixes: 5c7ab6348e7b3fcca2b8ee548306c774472971e2 ("V4L/DVB: V4L2: Add support for OMAP2/3 V4L2 display driver on top of DSS2")

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/drivers/media/platform/omap/omap_vout.c b/drivers/media/platform/omap/omap_vout.c
index 4d29860..6f1b0c7 100644 (file)
--- a/drivers/media/platform/omap/omap_vout.c
+++ b/drivers/media/platform/omap/omap_vout.c
@@ -1004,11 +1004,12 @@ static int omap_vout_open(struct file *file)
        struct omap_vout_device *vout = NULL;
 
        vout = video_drvdata(file);
-       v4l2_dbg(1, debug, &vout->vid_dev->v4l2_dev, "Entering %s\n", __func__);
 
        if (vout == NULL)
                return -ENODEV;
 
+       v4l2_dbg(1, debug, &vout->vid_dev->v4l2_dev, "Entering %s\n", __func__);
+
        /* for now, we only support single open */
        if (vout->opened)
                return -EBUSY;