wifi: ath12k: fix ath12k_core_pre_reconfigure_recovery() with grouping

Currently, ath12k_core_pre_reconfigure_recovery() reconfigures all radios
within the same group. During grouping and driver going for a recovery,
this function is called as many times as there are devices in the group.
Consequently, it performs the same reconfiguration multiple times, which
is unnecessary.

To prevent this, add a check to continue if the action has already been
taken.

To simplify the management of various flags, the reason for hardware queues
being stopped is used as a check instead of introducing a new flag.

While at it, also add missing wiphy locks. Wiphy lock is required since
ath12k_mac_drain_tx() which is called by
ath12k_core_pre_reconfigure_recovery() needs this lock to be held by the
caller.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1
Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3

Signed-off-by: Aditya Kumar Singh <aditya.kumar.singh@oss.qualcomm.com>
Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>
Link: https://patch.msgid.link/20250408-fix_reboot_issues_with_hw_grouping-v4-6-95e7bf048595@oss.qualcomm.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath12k/core.c b/drivers/net/wireless/ath/ath12k/core.c
index cb2a99d110d5..0fb3e57cd254 100644
--- a/drivers/net/wireless/ath/ath12k/core.c
+++ b/drivers/net/wireless/ath/ath12k/core.c
@@ -1411,6 +1411,18 @@ static void ath12k_core_pre_reconfigure_recovery(struct ath12k_base *ab)
 		    ah->state == ATH12K_HW_STATE_TM)
 			continue;
 
+		wiphy_lock(ah->hw->wiphy);
+
+		/* If queue 0 is stopped, it is safe to assume that all
+		 * other queues are stopped by driver via
+		 * ieee80211_stop_queues() below. This means, there is
+		 * no need to stop it again and hence continue
+		 */
+		if (ieee80211_queue_stopped(ah->hw, 0)) {
+			wiphy_unlock(ah->hw->wiphy);
+			continue;
+		}
+
 		ieee80211_stop_queues(ah->hw);
 
 		for (j = 0; j < ah->num_radio; j++) {
@@ -1439,6 +1451,8 @@ static void ath12k_core_pre_reconfigure_recovery(struct ath12k_base *ab)
 			ar->monitor_vdev_created = false;
 			ar->monitor_started = false;
 		}
+
+		wiphy_unlock(ah->hw->wiphy);
 	}
 
 	wake_up(&ab->wmi_ab.tx_credits_wq);