libertas: fix use-before-check violation

According to Coverity (kudo's to Adrian Bunk), we had one use-before-check
bug in libe libertas driver. This patch fixes this issue.

Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/net/wireless/libertas/scan.c b/drivers/net/wireless/libertas/scan.c
index e72c97a0d6c1..7234669d05c0 100644
--- a/drivers/net/wireless/libertas/scan.c
+++ b/drivers/net/wireless/libertas/scan.c
@@ -298,7 +298,8 @@ static int lbs_do_scan(struct lbs_private *priv, uint8_t bsstype,
         uint8_t *tlv;   /* pointer into our current, growing TLV storage area */
 
         lbs_deb_enter_args(LBS_DEB_SCAN, "bsstype %d, chanlist[].chan %d, chan_count %d",
-                           bsstype, chan_list[0].channumber, chan_count);
+                bsstype, chan_list ? chan_list[0].channumber : -1,
+                chan_count);
 
         /* create the fixed part for scan command */
         scan_cmd = kzalloc(MAX_SCAN_CFG_ALLOC, GFP_KERNEL);