mac80211: fix scan race, simplify code
authorJohannes Berg <johannes.berg@intel.com>
Mon, 7 Mar 2011 14:48:41 +0000 (15:48 +0100)
committerJohn W. Linville <linville@tuxdriver.com>
Mon, 7 Mar 2011 18:51:04 +0000 (13:51 -0500)
commitd07bfd8b6f20a81d7ec65c50f35b053d9e3aa740
tree3eaa4381dde301226625782d467778b32ee62c80
parent2a6672f2c425e6d1da2ef7f3169e417cd1f5a6cd
mac80211: fix scan race, simplify code

The scan code has a race that Michael reported
he ran into, but it's easy to fix while at the
same time simplifying the code.

The race resulted in the following warning:

------------[ cut here ]------------
WARNING: at net/mac80211/scan.c:310 ieee80211_rx_bss_free+0x20c/0x4b8 [mac80211]()
Modules linked in: [...]
[<c0033edc>] (unwind_backtrace+0x0/0xe0) from [<c004f2a4>] (warn_slowpath_common+0x4c/0x64)
[... backtrace wasn't useful ...]

Reported-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
net/mac80211/scan.c