From: YN Chen <yn.chen@mediatek.com>
Date: Sat, 28 May 2022 01:28:54 +0000 (+0800)
Subject: mt76: mt7921s: fix firmware download random fail
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a55a0c701c129f8e448f0ec1eb811dba728ace64;p=linux.git

mt76: mt7921s: fix firmware download random fail

To avoid racing problems in chip, mt7921s should reacquire drv-own after
firmware semaphore is released.

Fixes: 78b217580c509 ("mt76: mt7921s: fix bus hang with wrong privilege")
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>
---

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
index 7c55b712a765f..86d50c28d5376 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
@@ -583,13 +583,6 @@ 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)
-			ret = __mt7921_mcu_drv_pmctrl(dev);
-	}
-
 out:
 	sem = mt76_connac_mcu_patch_sem_ctrl(&dev->mt76, false);
 	switch (sem) {
@@ -600,6 +593,14 @@ out:
 		dev_err(dev->mt76.dev, "Failed to release patch semaphore\n");
 		break;
 	}
+
+	if (!ret && mt76_is_sdio(&dev->mt76)) {
+		/* activate again */
+		ret = __mt7921_mcu_fw_pmctrl(dev);
+		if (!ret)
+			ret = __mt7921_mcu_drv_pmctrl(dev);
+	}
+
 	release_firmware(fw);
 
 	return ret;