[PATCH 5/8] [media] gspca: Fix a warning for using len before filling it

[Mauro Carvalho Chehab <mchehab@redhat.com>]

The check for status errors is now before the check for len. That's
ok. However, the error printk's for the status error prints the URB
length. This generates this error:

drivers/media/video/gspca/gspca.c: In function ‘fill_frame’:
drivers/media/video/gspca/gspca.c:305:9: warning: ‘len’ may be used uninitialized in this function

The fix is as simple as moving the len init to happen before the checks.

Cc: Jean-François 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 92b5dfb..80b31eb 100644
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -318,6 +318,7 @@ static void fill_frame(struct gspca_dev *gspca_dev,
 	}
 	pkt_scan = gspca_dev->sd_desc->pkt_scan;
 	for (i = 0; i < urb->number_of_packets; i++) {
+		len = urb->iso_frame_desc[i].actual_length;
 
 		/* check the packet status and length */
 		st = urb->iso_frame_desc[i].status;
@@ -327,7 +328,6 @@ static void fill_frame(struct gspca_dev *gspca_dev,
 			gspca_dev->last_packet_type = DISCARD_PACKET;
 			continue;
 		}
-		len = urb->iso_frame_desc[i].actual_length;
 		if (len == 0) {
 			if (gspca_dev->empty_packet == 0)
 				gspca_dev->empty_packet = 1;
-- 
1.7.3.4