[PATCH] wifi: ath12k: fix recovery fail while firmware crash when doing channel switch

[Wen Gong]

When firmware crashed while channel switch running, recovery starts in
ath12k. Then ieee80211_sta_connection_lost() will be called by function
ieee80211_restart_work() in mac80211. And then many WMI command timeout
because firmware is crashed. Each WMI command cost 3 seconds, then the
total time will be large and leads recovery fail.

Hence change to set value ATH12K_FLAG_CRASH_FLUSH early and then
ath12k_wmi_cmd_send() will not wait 3 seconds, then recovery will be
started quickly and success.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4

Signed-off-by: Wen Gong <quic_wgong at quicinc.com>
---
 drivers/net/wireless/ath/ath12k/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/ath/ath12k/core.c b/drivers/net/wireless/ath/ath12k/core.c
index 3df8059d5512..56be7298ac86 100644
--- a/drivers/net/wireless/ath/ath12k/core.c
+++ b/drivers/net/wireless/ath/ath12k/core.c
@@ -685,6 +685,9 @@ static void ath12k_core_pre_reconfigure_recovery(struct ath12k_base *ab)
 	ab->stats.fw_crash_counter++;
 	spin_unlock_bh(&ab->base_lock);
 
+	if (ab->is_reset)
+		set_bit(ATH12K_FLAG_CRASH_FLUSH, &ab->dev_flags);
+
 	for (i = 0; i < ab->num_radios; i++) {
 		pdev = &ab->pdevs[i];
 		ar = pdev->ar;

base-commit: 3f257461ab0ab19806bae2bfde4c3cd88dbf050e
-- 
2.40.1