wifi: mac80211: Serialize ieee80211_handle_wake_tx_queue()

ieee80211_handle_wake_tx_queue must not run concurrent multiple times.
It calls ieee80211_txq_schedule_start() and the drivers migrated to iTXQ
do not expect overlapping drv_tx() calls.

This fixes 'c850e31f79f0 ("wifi: mac80211: add internal handler for
wake_tx_queue")', which introduced ieee80211_handle_wake_tx_queue.
Drivers started to use it with 'a790cc3a4fad ("wifi: mac80211: add
wake_tx_queue callback to drivers")'.
But only after fixing an independent bug with
'4444bc2116ae ("wifi: mac80211: Proper mark iTXQs for resumption")'
problematic concurrent calls really happened and exposed the initial
issue.

Fixes: c850e31f79f0 ("wifi: mac80211: add internal handler for wake_tx_queue")
Reported-by: Thomas Mann <[email protected]>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=217119
Link: https://lore.kernel.org/r/[email protected]/
Link: https://lore.kernel.org/r/[email protected]>
CC: <[email protected]>
Signed-off-by: Alexander Wetzel <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[add missing spin_lock_init() noticed by Felix]
Signed-off-by: Johannes Berg <[email protected]>

0 files changed, 0 insertions, 0 deletions