This is a note to let you know that I've just added the patch titled
wifi: iwlwifi: pull from TXQs with softirqs disabled
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
wifi-iwlwifi-pull-from-txqs-with-softirqs-disabled.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit b70e3e70a32cc4a7b7c79dbdb5ba5f2abc72cb8a
Author: Johannes Berg <johannes.berg@xxxxxxxxx>
Date: Wed Jun 14 12:41:22 2023 +0300
wifi: iwlwifi: pull from TXQs with softirqs disabled
[ Upstream commit 96fb6f47db24a712d650b0a9b9074873f273fb0e ]
In mac80211, it's required that we pull from TXQs by calling
ieee80211_tx_dequeue() only with softirqs disabled. However,
in iwl_mvm_queue_state_change() we're often called with them
enabled, e.g. from flush if anything was flushed, triggering
a mac80211 warning.
Fix that by disabling the softirqs across the TX call.
Fixes: cfbc6c4c5b91 ("iwlwifi: mvm: support mac80211 TXQs model")
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Gregory Greenman <gregory.greenman@xxxxxxxxx>
Link: https://lore.kernel.org/r/20230614123446.0feef7fa81db.I4dd62542d955b40dd8f0af34fa4accb9d0d17c7e@changeid
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
index 3ee4b3ecd0c82..01f65c9789e72 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
@@ -1309,8 +1309,11 @@ static void iwl_mvm_queue_state_change(struct iwl_op_mode *op_mode,
else
set_bit(IWL_MVM_TXQ_STATE_STOP_FULL, &mvmtxq->state);
- if (start && mvmsta->sta_state != IEEE80211_STA_NOTEXIST)
+ if (start && mvmsta->sta_state != IEEE80211_STA_NOTEXIST) {
+ local_bh_disable();
iwl_mvm_mac_itxq_xmit(mvm->hw, txq);
+ local_bh_enable();
+ }
}
out:
