wifi: iwlwifi: pull from TXQs with softirqs disabled

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: cfbc6c4c ("iwlwifi: mvm: support mac80211 TXQs model")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230614123446.0feef7fa81db.I4dd62542d955b40dd8f0af34fa4accb9d0d17c7e@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/ops.c

@@ -1740,8 +1740,11 @@ 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: