From 51ae268c96b9c2c116dab875ac0f1d8fee35fcb6 Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes@sipsolutions.net>
Date: Fri, 8 May 2009 09:42:33 +0200
Subject: [PATCH] --- yaml --- r: 150259 b: refs/heads/master c:
 0b258582fef3a9b15b2372d99164859361faa8db h: refs/heads/master i:   150257:
 f7ec94cc7a49c9533ee8da25450c52cdc6376260   150255:
 df9b95e6ad8516a4d4a1473019014013548ec090 v: v3

---
 [refs]                           |  2 +-
 trunk/net/wireless/wext-compat.c | 24 ++++++++++++++++++------
 2 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/[refs] b/[refs]
index 8aeee6f14e79..fe00ce505291 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: aa837e1d6bd1a71b3c30c7738b6c29d41512fe7d
+refs/heads/master: 0b258582fef3a9b15b2372d99164859361faa8db
diff --git a/trunk/net/wireless/wext-compat.c b/trunk/net/wireless/wext-compat.c
index 5ef82f2ca88f..abf6b0a047d8 100644
--- a/trunk/net/wireless/wext-compat.c
+++ b/trunk/net/wireless/wext-compat.c
@@ -296,22 +296,34 @@ EXPORT_SYMBOL_GPL(cfg80211_wext_siwmlme);
 struct ieee80211_channel *cfg80211_wext_freq(struct wiphy *wiphy,
 					     struct iw_freq *freq)
 {
+	struct ieee80211_channel *chan;
+	int f;
+
+	/*
+	 * Parse frequency - return NULL for auto and
+	 * -EINVAL for impossible things.
+	 */
 	if (freq->e == 0) {
 		if (freq->m < 0)
 			return NULL;
-		else
-			return ieee80211_get_channel(wiphy,
-				ieee80211_channel_to_frequency(freq->m));
+		f = ieee80211_channel_to_frequency(freq->m);
 	} else {
 		int i, div = 1000000;
 		for (i = 0; i < freq->e; i++)
 			div /= 10;
-		if (div > 0)
-			return ieee80211_get_channel(wiphy, freq->m / div);
-		else
+		if (div <= 0)
 			return ERR_PTR(-EINVAL);
+		f = freq->m / div;
 	}
 
+	/*
+	 * Look up channel struct and return -EINVAL when
+	 * it cannot be found.
+	 */
+	chan = ieee80211_get_channel(wiphy, f);
+	if (!chan)
+		return ERR_PTR(-EINVAL);
+	return chan;
 }
 EXPORT_SYMBOL_GPL(cfg80211_wext_freq);