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wifi: iwlwifi: mvm: don't wait for tx queues if firmware is dead

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There is a WARNING in iwl_trans_wait_tx_queues_empty() (that was
recently converted from just a message), that can be hit if we
wait for TX queues to become empty after firmware died. Clearly,
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>
Link: https://patch.msgid.link/20240825191257.a7cbd794cee9.I44a739fbd4ffcc46b83844dd1c7b2eb0c7b270f6@changeid
[edit commit message]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Emmanuel Grumbach 2024-08-25 19:17:04 +03:00 committed by Johannes Berg
parent 454f6306a3
commit 3a84454f52
1 changed files with 8 additions and 1 deletions
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9
drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
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@ -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);
}