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[04/13] wifi: iwlwifi: mvm: don't wait for tx queues if firmware is dead

Message ID 20240825191257.a7cbd794cee9.I44a739fbd4ffcc46b83844dd1c7b2eb0c7b270f6@changeid
State New
Headers show
Series wifi: iwlwifi: fixes - 25-08-2024 | expand

Commit Message

Korenblit, Miriam Rachel Aug. 25, 2024, 4:17 p.m. UTC 
From: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

There is a WARNING in iwl_trans_wait_tx_queues_empty() which we hit it's
become a WARNING.
The problem is that we can't expect anything from the firmware after
it's declared dead.
Don't call iwl_trans_wait_tx_queues_empty() in this case. While it could
be a good idea to stop the flow earlier, the flush functions do some
maintenance work that is not related to the firmware, so keep that part
of the code running even when the firmware is not running.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index 7236ff7277ce..5544426dfd1a 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -5818,6 +5818,10 @@  static void iwl_mvm_flush_no_vif(struct iwl_mvm *mvm, u32 queues, bool drop)
 	int i;
 
 	if (!iwl_mvm_has_new_tx_api(mvm)) {
+		/* we can't ask the firmware anything if it is dead */
+		if (test_bit(IWL_MVM_STATUS_HW_RESTART_REQUESTED,
+			     &mvm->status))
+			return;
 		if (drop) {
 			guard(mvm)(mvm);
 			iwl_mvm_flush_tx_path(mvm,
@@ -5911,8 +5915,11 @@  void iwl_mvm_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 
 	/* this can take a while, and we may need/want other operations
 	 * to succeed while doing this, so do it without the mutex held
+	 * If the firmware is dead, this can't work...
 	 */
-	if (!drop && !iwl_mvm_has_new_tx_api(mvm))
+	if (!drop && !iwl_mvm_has_new_tx_api(mvm) &&
+	    !test_bit(IWL_MVM_STATUS_HW_RESTART_REQUESTED,
+		      &mvm->status))
 		iwl_trans_wait_tx_queues_empty(mvm->trans, msk);
 }