diff mbox series

[v2,15/24] wifi: mt76: mt7915: reset the device after MCU timeout

Message ID 20240827093011.18621-15-nbd@nbd.name
State New
Headers show
Series [v2,01/24] mt76: mt7603: fix mixed declarations and code | expand

Commit Message

Felix Fietkau Aug. 27, 2024, 9:30 a.m. UTC 
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@nbd.name>
---
 drivers/net/wireless/mediatek/mt76/mt7915/mcu.c | 9 +++++++++
 1 file changed, 9 insertions(+)
diff mbox series

Patch

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;
 	}