wl12xx: implement SW Tx watchdog
Track freed FW blocks during Tx. If no blocks were freed during a
predefined timeout, initiate a HW recovery. This helps in situations
when the FW watchdog fails.
Don't trigger recovery during activities that can temporarily stop
Tx. This includes:
- scanning
- buffering packets for sleeping stations (AP role)
- ROC on any role
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
diff --git a/drivers/net/wireless/wl12xx/cmd.c b/drivers/net/wireless/wl12xx/cmd.c
index 1ef212f..3414fc1 100644
--- a/drivers/net/wireless/wl12xx/cmd.c
+++ b/drivers/net/wireless/wl12xx/cmd.c
@@ -1818,6 +1818,14 @@
goto out;
__clear_bit(role_id, wl->roc_map);
+
+ /*
+ * Rearm the tx watchdog when removing the last ROC. This prevents
+ * recoveries due to just finished ROCs - when Tx hasn't yet had
+ * a chance to get out.
+ */
+ if (find_first_bit(wl->roc_map, WL12XX_MAX_ROLES) >= WL12XX_MAX_ROLES)
+ wl12xx_rearm_tx_watchdog_locked(wl);
out:
return ret;
}