tree 3462550733d3646acf56b9048772ed21f6ead8f5
parent ff40231282d4eb57c5008ed48fef6dd1be9f3130
author Emmanuel Grumbach <emmanuel.grumbach@intel.com> 1365318824 +0300
committer Johannes Berg <johannes.berg@intel.com> 1365420740 +0200

iwlwifi: dvm: handle FLUSH ampdu actions from mac80211

Until now we didn't handle properly the FLUSH ampdu action
coming from mac80211. This could result in SCD queue leak:
mac80211 would STOP_FLUSH an AMPDU Tx session and remove
the station. If we had still packets on the ring, we
wouldn't deallocate the SCD queue and wait for it to be
empty.
The indication of the queue being empty comes from the Tx
response flow which relies on the tid_data structure. The
problem is that this structure has been cleared when the
station has been removed.
In order to solve this issue, block in the STOP_FLUSH
ampdu_action until the SCD queue is flushed, and only then,
let mac80211 move forward to remove the station.
iwlagn_txfifo_flush had to be enhanced to allow this.

The bug fixed here caused the "txq_id mismatch: 12 0" print.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>