tree fbbdae22f891b0e9eb5fd26abe0890ca2762bd89
parent 433ab34d26e29d0f036c3f514a09ae96f973d8c5
author Michal Kazior <michal.kazior@tieto.com> 1408360749 +0200
committer Linus Torvalds <torvalds@linux-foundation.org> 1408743949 -0700

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>