From: Chuanhong Guo Date: Wed, 23 Sep 2020 07:23:03 +0000 (+0800) Subject: mt76: mt7615: retry if mt7615_mcu_init returns -EAGAIN X-Git-Tag: accepted/tizen/unified/20230118.172025~8321^2~32^2~19^2~86 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ced050ae3ab6bef58a02832dff735a1988cf3f2e;p=platform%2Fkernel%2Flinux-rpi.git mt76: mt7615: retry if mt7615_mcu_init returns -EAGAIN 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 Signed-off-by: Felix Fietkau --- diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/pci_init.c b/drivers/net/wireless/mediatek/mt76/mt7615/pci_init.c index 06a0f8f..27fcb13 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7615/pci_init.c +++ b/drivers/net/wireless/mediatek/mt76/mt7615/pci_init.c @@ -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);