linux-kernel - [PATCH 5.13 156/156] mt76: mt7921: continue to probe driver when fw already downloaded

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Message-Id: <20210722155633.397039609@linuxfoundation.org>
Date:   Thu, 22 Jul 2021 18:32:11 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Aaron Ma <aaron.ma@...onical.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 5.13 156/156] mt76: mt7921: continue to probe driver when fw already downloaded

From: Aaron Ma <aaron.ma@...onical.com>

commit c34269041185dad1bab7a34f42ef9fab967a1684 upstream.

When reboot system, no power cycles, firmware is already downloaded,
return -EIO will break driver as error:
mt7921e: probe of 0000:03:00.0 failed with error -5

Skip firmware download and continue to probe.

Signed-off-by: Aaron Ma <aaron.ma@...onical.com>
Fixes: 1c099ab44727c ("mt76: mt7921: add MCU support")
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/wireless/mediatek/mt76/mt7921/mcu.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
@@ -921,7 +921,7 @@ static int mt7921_load_firmware(struct m
 	ret = mt76_get_field(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_N9_RDY);
 	if (ret) {
 		dev_dbg(dev->mt76.dev, "Firmware is already download\n");
-		return -EIO;
+		goto fw_loaded;
 	}
 
 	ret = mt7921_load_patch(dev);
@@ -939,6 +939,7 @@ static int mt7921_load_firmware(struct m
 		return -EIO;
 	}
 
+fw_loaded:
 	mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[MT_MCUQ_FWDL], false);
 
 #ifdef CONFIG_PM