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/tx.c b/drivers/net/wireless/wl12xx/tx.c
index 8f78fdd..43ae491 100644
--- a/drivers/net/wireless/wl12xx/tx.c
+++ b/drivers/net/wireless/wl12xx/tx.c
@@ -226,6 +226,10 @@
wl->tx_blocks_available -= total_blocks;
wl->tx_allocated_blocks += total_blocks;
+ /* If the FW was empty before, arm the Tx watchdog */
+ if (wl->tx_allocated_blocks == total_blocks)
+ wl12xx_rearm_tx_watchdog_locked(wl);
+
ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
wl->tx_allocated_pkts[ac]++;