[PATCH] mt76: mt7921: continue to probe driver when fw already downloaded

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 <redacted>
---
 drivers/net/wireless/mediatek/mt76/mt7921/mcu.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
index c2c4dc196802..cd690c64f65b 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c

@@ -931,7 +931,7 @@ static int mt7921_load_firmware(struct mt7921_dev *dev)
 	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);

@@ -949,6 +949,7 @@ static int mt7921_load_firmware(struct mt7921_dev *dev)
 		return -EIO;
 	}
 
+fw_loaded:
 	mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[MT_MCUQ_FWDL], false);
 
 #ifdef CONFIG_PM

-- 
2.32.0

Hi Aaron,

Thanks for this patch. We verified this is good here.

Could you please add fix tag as well? It's better to backport this
patch.

Fixes: 1c099ab44727c ("mt76: mt7921: add MCU support")


Thanks,
Deren


On Thu, 2021-07-08 at 21:17 +0800, Aaron Ma wrote:

Hello:

This patch was applied to netdev/net.git (refs/heads/master):

On Thu,  8 Jul 2021 21:17:10 +0800 you wrote:

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 <redacted>

[...]

Here is the summary with links:
  - mt76: mt7921: continue to probe driver when fw already downloaded
    https://git.kernel.org/netdev/net/c/c34269041185

You are awesome, thank you!
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