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

[Deren Wu <deren.wu@mediatek.com>]

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:
> 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@canonical.com>
> ---
>  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