tree 94f8727e5027a09f24623bd4dcecbbbe1be6922a
parent 8b9fce77737ae9983f61ec56cd53f52fb738b2c7
author Johannes Berg <johannes.berg@intel.com> 1270624896 -0700
committer Reinette Chatre <reinette.chatre@intel.com> 1271449630 -0700

iwlwifi: fix scan races

When an internal scan is started, nothing protects the
is_internal_short_scan variable which can cause crashes,
cf. https://bugzilla.kernel.org/show_bug.cgi?id=15667.
Fix this by making the short scan request use the mutex
for locking, which requires making the request go to a
work struct so that it can sleep.

Reported-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>