cfg80211: minimal error handling for wext-compat freq scanning

Commit Message

Holger Schurig Sept. 11, 2009, 8:13 a.m. UTC

Signed-off-by: Holger Schurig <[e-mail]>

Patch

Index: linux-wl/net/wireless/scan.c
===================================================================
--- linux-wl.orig/net/wireless/scan.c	2009-09-11 09:05:39.000000000 +0200
+++ linux-wl/net/wireless/scan.c	2009-09-11 09:05:42.000000000 +0200
@@ -680,6 +680,11 @@  int cfg80211_wext_siwscan(struct net_dev
 		err = -EINVAL;
 		goto out;
 	}
+	/* No channels found? */
+	if (!i) {
+		err = -EINVAL;
+		goto out;
+	}
 
 	/* Set real number of channels specified in creq->channels[] */
 	creq->n_channels = i;