From: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Date: Thu, 15 Sep 2011 12:10:50 +0000 (+0530)
Subject: wireless: Do not allow disabled channel in scan request
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e30815016bbd0b5c3dcdc29f53e054b57938f1aa;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

wireless: Do not allow disabled channel in scan request

cfg80211_conn_scan allows disabled channels at scan request.
Hence probe request was seen at the disabled one. This patch
ensures that disabled channel never be added into the scan
request's channel list.

Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/net/wireless/sme.c b/net/wireless/sme.c
index dec0fa28372..6e86d5acf14 100644
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -110,17 +110,22 @@ static int cfg80211_conn_scan(struct wireless_dev *wdev)
 	else {
 		int i = 0, j;
 		enum ieee80211_band band;
+		struct ieee80211_supported_band *bands;
+		struct ieee80211_channel *channel;
 
 		for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
-			if (!wdev->wiphy->bands[band])
+			bands = wdev->wiphy->bands[band];
+			if (!bands)
 				continue;
-			for (j = 0; j < wdev->wiphy->bands[band]->n_channels;
-			     i++, j++)
-				request->channels[i] =
-					&wdev->wiphy->bands[band]->channels[j];
-			request->rates[band] =
-				(1 << wdev->wiphy->bands[band]->n_bitrates) - 1;
+			for (j = 0; j < bands->n_channels; j++) {
+				channel = &bands->channels[j];
+				if (channel->flags & IEEE80211_CHAN_DISABLED)
+					continue;
+				request->channels[i++] = channel;
+			}
+			request->rates[band] = (1 << bands->n_bitrates) - 1;
 		}
+		n_channels = i;
 	}
 	request->n_channels = n_channels;
 	request->ssids = (void *)&request->channels[n_channels];