linux-kernel - Re: [PATCH 1/3] usb: aspeed-vhub: add qualifier descriptor

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Message-ID: <84b2d2c6b530d0a3a9b86b0ffcbfa70935bdb0a9.camel@kernel.crashing.org>
Date:   Tue, 30 Nov 2021 10:40:59 +1100
From:   Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:     Neal Liu <neal_liu@...eedtech.com>,
        Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Joel Stanley <joel@....id.au>,
        Andrew Jeffery <andrew@...id.au>,
        Cai Huoqing <caihuoqing@...du.com>,
        Tao Ren <rentao.bupt@...il.com>,
        Julia Lawall <julia.lawall@...ia.fr>,
        kernel test robot <lkp@...el.com>,
        Sasha Levin <sashal@...nel.org>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-aspeed@...ts.ozlabs.org
Cc:     BMC-SW@...eedtech.com
Subject: Re: [PATCH 1/3] usb: aspeed-vhub: add qualifier descriptor

On Fri, 2021-11-26 at 19:09 +0800, Neal Liu wrote:
> 
> @@ -417,10 +435,9 @@ enum std_req_rc ast_vhub_std_hub_request(struct ast_vhub_ep *ep,
>  
>  		/* GET/SET_CONFIGURATION */
>  	case DeviceRequest | USB_REQ_GET_CONFIGURATION:
> -		return ast_vhub_simple_reply(ep, 1);
> +		return ast_vhub_simple_reply(ep, vhub->current_config);
>  	case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
> -		if (wValue != 1)
> -			return std_req_stall;
> +		vhub->current_config = wValue;
>  		return std_req_complete;

This is odd.. why should we support arbitrary SET_CONFIGURATION for
configs we don't support ?

Otherwise looks good.

Cheers,
Ben.