On MT7915, MCU hangs do not trigger watchdog interrupts, so they can only
be detected through MCU message timeouts. Ensure that the hardware gets
restarted when that happens in order to prevent a permanent stuck state.
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
---
drivers/net/wireless/mediatek/mt76/mt7915/mcu.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
index 0cde1b3c7d41..81375b5d0021 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
@@ -157,12 +157,21 @@ static int
mt7915_mcu_parse_response(struct mt76_dev *mdev, int cmd,
struct sk_buff *skb, int seq)
{
+ struct mt7915_dev *dev = container_of(mdev, struct mt7915_dev, mt76);
struct mt76_connac2_mcu_rxd *rxd;
int ret = 0;
if (!skb) {
dev_err(mdev->dev, "Message %08x (seq %d) timeout\n",
cmd, seq);
+
+ if (!test_and_set_bit(MT76_MCU_RESET, &dev->mphy.state)) {
+ dev->recovery.restart = true;
+ wake_up(&dev->mt76.mcu.wait);
+ queue_work(dev->mt76.wq, &dev->reset_work);
+ wake_up(&dev->reset_wait);
+ }
+
return -ETIMEDOUT;
}
--
2.46.0
