Commit 78b21758 authored Nov 28, 2021 by Deren Wu Committed by Felix Fietkau Dec 19, 2021

mt76: mt7921s: fix bus hang with wrong privilege



Accroding to chip hw flow, mt7921s need to re-acquire privilege
again before normal running. Otherwise, the bus may be stuck in
an abnormal status.

Tested-by: Leon Yen <Leon.Yen@mediatek.com>
Co-developed-by: Eric-SY Chang <Eric-SY.Chang@mediatek.com>
Signed-off-by: Eric-SY Chang <Eric-SY.Chang@mediatek.com>
Co-developed-by: YN Chen <YN.Chen@mediatek.com>
Signed-off-by: YN Chen <YN.Chen@mediatek.com>
Signed-off-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

parent 00ff5234

drivers/net/wireless/mediatek/mt76/mt7921/mcu.c

+11 −0

Original line number	Diff line number	Diff line
		@@ -720,6 +720,17 @@ static int mt7921_load_patch(struct mt7921_dev *dev)
		if (ret)
		dev_err(dev->mt76.dev, "Failed to start patch\n");

		if (mt76_is_sdio(&dev->mt76)) {
		/* activate again */
		ret = __mt7921_mcu_fw_pmctrl(dev);
		if (ret)
		return ret;

		ret = __mt7921_mcu_drv_pmctrl(dev);
		if (ret)
		return ret;
		}

		out:
		sem = mt76_connac_mcu_patch_sem_ctrl(&dev->mt76, false);
		switch (sem) {