mac80211: fix update_tkip_key() documentation about the context

Johannes noticed that I had incorrectly documented the context of
update_tkip_key() driver operation. It must be atomic because all
RX code is run inside rcu critical section.

Reported-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Kalle Valo <kalle.valo@iki.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 1 insertions, 3 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index f56d6f479532..f64402f6312b 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1489,7 +1489,7 @@ enum ieee80211_ampdu_mlme_action {
  * @update_tkip_key: See the section "Hardware crypto acceleration"
  *      This callback will be called in the context of Rx. Called for drivers
  *      which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY.
- *      The callback can sleep.
+ *      The callback must be atomic.
  *
  * @hw_scan: Ask the hardware to service the scan request, no need to start
  *      the scan state machine in stack. The scan must honour the channel
diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
index 40c6e9a89864..6c31f38ac7f5 100644
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -144,8 +144,6 @@ static inline void drv_update_tkip_key(struct ieee80211_local *local,
 {
         struct ieee80211_sta *ista = NULL;
 
-        might_sleep();
-
         if (sta)
                 ista = &sta->sta;