diff options
author | Johannes Berg <johannes.berg@intel.com> | 2013-08-21 22:07:20 +0200 |
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committer | Johannes Berg <johannes.berg@intel.com> | 2013-09-26 13:21:37 +0200 |
commit | c7c71066c27f2bafb2ce3b10c407c0285f56acfa (patch) | |
tree | 183c3557d596a8ae69bf3ae9219e7ef49456052e /firmware/mts_gsm.fw.ihex | |
parent | 272b98c6455f00884f0350f775c5342358ebb73f (diff) |
mac80211: add ieee80211_iterate_active_interfaces_rtnl()
If it is needed to disconnect multiple virtual interfaces after
(WoWLAN-) suspend, the most obvious approach would be to iterate
all interfaces by calling ieee80211_iterate_active_interfaces()
and then call ieee80211_resume_disconnect() for each one. This
is what the iwlmvm driver does.
Unfortunately, this causes a locking dependency from mac80211's
iflist_mtx to the key_mtx. This is problematic as the former is
intentionally never held while calling any driver operation to
allow drivers to iterate with their own locks held. The key_mtx
is held while installing a key into the driver though, so this
new lock dependency means drivers implementing the logic above
can no longer hold their own lock while iterating.
To fix this, add a new ieee80211_iterate_active_interfaces_rtnl()
function that iterates while the RTNL is already held. This is
true during suspend/resume, so that then the locking dependency
isn't introduced.
While at it, also refactor the various interface iterators and
keep only a single implementation called by the various cases.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'firmware/mts_gsm.fw.ihex')
0 files changed, 0 insertions, 0 deletions