[PATCH 9/9] wifi: ath12k: skip sending vdev down for channel switch

[Aloka Dixit <quic_alokad@xxxxxxxxxxx>]

Remove the unnecessary WMI vdev down operation as firmware
internally does so already as part of WMI vdev restart.
Repeated vdev down results in a firmware crash during channel
switch operation when multiple BSSID advertisements are enabled:
ath12k_pci 0000:06:00.0: firmware crashed: MHI_CB_SYS_ERROR
ath12k_pci 0000:06:00.0: failed to send WMI_VDEV_SET_PARAM_CMDID
ath12k_pci 0000:06:00.0: failed to set vdev 5 HE MU mode: -108 param_value 7b
ath12k_pci 0000:06:00.0: failed to set he mode vdev 5
ath12k_pci 0000:06:00.0: failed to restart vdev 5: -108
ath12k_pci 0000:06:00.0: failed to send WMI_VDEV_SET_PARAM_CMDID
ath12k_pci 0000:06:00.0: failed to set vdev 4 HE MU mode: -108 param_value 7b
ath12k_pci 0000:06:00.0: failed to set he mode vdev 4
ath12k_pci 0000:06:00.0: failed to restart vdev 4: -108
ath12k_pci 0000:06:00.0: failed to send WMI_VDEV_SET_PARAM_CMDID

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1

Signed-off-by: Aloka Dixit <quic_alokad@xxxxxxxxxxx>
---
 drivers/net/wireless/ath/ath12k/mac.c | 29 +++------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c
index af5851373bcc..69ea2e98910a 100644
--- a/drivers/net/wireless/ath/ath12k/mac.c
+++ b/drivers/net/wireless/ath/ath12k/mac.c
@@ -6741,9 +6741,10 @@ ath12k_mac_update_vif_chan(struct ath12k *ar,
 	lockdep_assert_held(&ar->conf_mutex);
 
 	for (i = 0; i < n_vifs; i++) {
-		arvif = ath12k_vif_to_arvif(vifs[i].vif);
+		vif = vifs[i].vif;
+		arvif = ath12k_vif_to_arvif(vif);
 
-		if (vifs[i].vif->type == NL80211_IFTYPE_MONITOR)
+		if (vif->type == NL80211_IFTYPE_MONITOR)
 			monitor_vif = true;
 
 		ath12k_dbg(ab, ATH12K_DBG_MAC,
@@ -6754,30 +6755,6 @@ ath12k_mac_update_vif_chan(struct ath12k *ar,
 			   vifs[i].old_ctx->def.width,
 			   vifs[i].new_ctx->def.width);
 
-		if (WARN_ON(!arvif->is_started))
-			continue;
-
-		if (WARN_ON(!arvif->is_up))
-			continue;
-
-		ret = ath12k_wmi_vdev_down(ar, arvif->vdev_id);
-		if (ret) {
-			ath12k_warn(ab, "failed to down vdev %d: %d\n",
-				    arvif->vdev_id, ret);
-			continue;
-		}
-	}
-
-	/* All relevant vdevs are downed and associated channel resources
-	 * should be available for the channel switch now.
-	 */
-
-	/* TODO: Update ar->rx_channel */
-
-	for (i = 0; i < n_vifs; i++) {
-		vif = vifs[i].vif;
-		arvif = ath12k_vif_to_arvif(vif);
-
 		if (WARN_ON(!arvif->is_started))
 			continue;
 
-- 
2.39.0