From: Michal Kazior <michal.kazior@tieto.com>
Date: Mon, 18 Aug 2014 11:19:09 +0000 (+0200)
Subject: mac80211: fix channel switch for chanctx-based drivers
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~23
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=47e4df94d129cbca84de252ff63c4ded08a513e7;p=pandora-kernel.git

mac80211: fix channel switch for chanctx-based drivers

The new_ctx pointer is set only for non-chanctx drivers.  This yielded a
crash for chanctx-based drivers during channel switch finalization:

  BUG: unable to handle kernel NULL pointer dereference at 0000000000000020
  IP: ieee80211_vif_use_reserved_switch+0x71c/0xb00 [mac80211]

Use an adequate chanctx pointer to fix this.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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