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mt76: mt7615: retry if mt7615_mcu_init returns -EAGAIN

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mt7615_load_patch in mt7615/mcu.c sometimes fails with:
mt7622-wmac 18000000.wmac: Failed to get patch semaphore
and returns -EAGAIN. But this error is returned all the way up to
mt7615_init_work with no actual retrial performed, leaving a
broken wireless phy.
Wait a bit and retry for up to 10 times before giving up.

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Chuanhong Guo 2020-09-23 15:23:03 +08:00 committed by Felix Fietkau
parent 77d157f200
commit ced050ae3a
1 changed files with 8 additions and 1 deletions
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9
drivers/net/wireless/mediatek/mt76/mt7615/pci_init.c
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@ -16,8 +16,15 @@ static void mt7615_init_work(struct work_struct *work)
{
struct mt7615_dev *dev = container_of(work, struct mt7615_dev,
mcu_work);
int i, ret;
if (mt7615_mcu_init(dev))
ret = mt7615_mcu_init(dev);
for (i = 0; (ret == -EAGAIN) && (i < 10); i++) {
msleep(200);
ret = mt7615_mcu_init(dev);
}
if (ret)
return;
mt7615_mcu_set_eeprom(dev);