From 8862dc5f25153a3c565a097220ed3de14ed72dfd Mon Sep 17 00:00:00 2001
From: Holger Schurig <hs4233@mail.mn-solutions.de>
Date: Fri, 11 Sep 2009 10:13:55 +0200
Subject: [PATCH] cfg80211: minimal error handling for wext-compat freq
 scanning

Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 net/wireless/scan.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 6c20b6515ab..e5f92ee758f 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -675,6 +675,11 @@ int cfg80211_wext_siwscan(struct net_device *dev,
 		wext_freq_not_found: ;
 		}
 	}
+	/* No channels found? */
+	if (!i) {
+		err = -EINVAL;
+		goto out;
+	}
 
 	/* Set real number of channels specified in creq->channels[] */
 	creq->n_channels = i;
-- 
2.20.1