V4L/DVB (9079): gspca: Return error code from stream start functions.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index 4694dc1..a286b91 100644
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -584,7 +584,11 @@
 			goto out;
 
 		/* start the cam */
-		gspca_dev->sd_desc->start(gspca_dev);
+		ret = gspca_dev->sd_desc->start(gspca_dev);
+		if (ret < 0) {
+			destroy_urbs(gspca_dev);
+			goto out;
+		}
 		gspca_dev->streaming = 1;
 		atomic_set(&gspca_dev->nevent, 0);