On 8/2/2023 1:58 AM, Manish Dharanenthiran wrote:
Fix WARN_ON() from ath12k_mac_update_vif_chan() if vdev is not up.
Since change_chanctx can be called even before vdev_up.
Do vdev stop followed by a vdev start in case of vdev is down.
Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0-02903-QCAHKSWPL_SILICONZ-1
Has this been tested on WCN7850? My understanding is that firmware may
expect vdev down and then vdev restart
Signed-off-by: Manish Dharanenthiran <quic_mdharane@xxxxxxxxxxx>
---
drivers/net/wireless/ath/ath12k/mac.c | 27 +++++++++++++++++++++------
1 file changed, 21 insertions(+), 6 deletions(-)
diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c
index 1bb9802ef569..0ab95e138d1d 100644
--- a/drivers/net/wireless/ath/ath12k/mac.c
+++ b/drivers/net/wireless/ath/ath12k/mac.c
@@ -5698,13 +5698,28 @@ ath12k_mac_update_vif_chan(struct ath12k *ar,
if (WARN_ON(!arvif->is_started))
continue;
- if (WARN_ON(!arvif->is_up))
- continue;
+ /* Firmware expect vdev_restart only if vdev is up.
+ * If vdev is down then it expect vdev_stop->vdev_start.
+ */
+ if (arvif->is_up) {
+ ret = ath12k_mac_vdev_restart(arvif, &vifs[i].new_ctx->def);
+ if (ret) {
+ ath12k_warn(ab, "failed to restart vdev %d: %d\n",
+ arvif->vdev_id, ret);
+ continue;
+ }
+ } else {
+ ret = ath12k_mac_vdev_stop(arvif);
+ if (ret) {
+ ath12k_warn(ab, "failed to stop vdev %d: %d\n",
+ arvif->vdev_id, ret);
+ continue;
+ }
- ret = ath12k_mac_vdev_restart(arvif, &vifs[i].new_ctx->def);
- if (ret) {
- ath12k_warn(ab, "failed to restart vdev %d: %d\n",
- arvif->vdev_id, ret);
+ ret = ath12k_mac_vdev_start(arvif, &vifs[i].new_ctx->def);
+ if (ret)
+ ath12k_warn(ab, "failed to start vdev %d: %d\n",
+ arvif->vdev_id, ret);
continue;
}
