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cfg80211: fix locking for SIWFREQ

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"cfg80211: validate channel settings across interfaces"
contained a locking bug -- in the managed-mode SIWFREQ
call it would end up running into a lock recursion.

This fixes it by not checking that particular interface
for a channel that it needs to stay on, which is as it
should be as that's the interface we're setting the
channel for.

Reported-by: Reinette Chatre <reinette.chatre@intel.com>
Reported-by: Kalle Valo <kalle.valo@iki.fi>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Tested-by: Kalle Valo <kalle.valo@iki.fi>
Tested-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
2009-08-08 11:03:58 +02:00
committed by John W. Linville
parent e312c24cf8
commit 4b181144e6
5 changed files with 6 additions and 4 deletions
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2
net/wireless/nl80211.c
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@@ -721,7 +721,7 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
mutex_lock(&rdev->devlist_mtx);
result = rdev_set_freq(rdev, freq, channel_type);
result = rdev_set_freq(rdev, NULL, freq, channel_type);
mutex_unlock(&rdev->devlist_mtx);
if (result)
goto bad_res;