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wifi: mt76: mt7915: reset the device after MCU timeout

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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.

Link: https://patch.msgid.link/20240827093011.18621-15-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2024-08-27 11:30:02 +02:00
parent 3688c18b65
commit 10f73bb393
1 changed files with 9 additions and 0 deletions
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9
drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
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@ -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;
}