linux-kernel - Re: [PATCH v2] usb: common: usb-conn-gpio: Set last role to unknown before initial detection

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Message-ID: <05ff6015-aecf-8fb4-ee29-ea7b37060a13@quicinc.com>
Date:   Thu, 25 May 2023 13:57:50 +0530
From:   Prashanth K <quic_prashk@...cinc.com>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] usb: common: usb-conn-gpio: Set last role to unknown
 before initial detection



On 25-05-23 01:37 pm, AngeloGioacchino Del Regno wrote:
> Il 24/05/23 15:50, Prashanth K ha scritto:
>> Currently if we bootup a device without cable connected, then
>> usb-conn-gpio won't call set_role() since last_role is same as
>> current role. This happens because during probe last_role gets
>> initialized to zero.
>>
>> To avoid this, added a new constant in enum usb_role, last_role
>> is set to USB_ROLE_UNKNOWN before performing initial detection.
>>
>> Fixes: 4602f3bff266 ("usb: common: add USB GPIO based connection 
>> detection driver")
>> Signed-off-by: Prashanth K <quic_prashk@...cinc.com>
> 
> There's an issue with drivers/usb/cdns3/core.c as pointed out by the
> test robot; the solution is to handle `default` in the switch, I'd say
> that it would be safe to handle it as
> 
>      default:
>          break;
> 
> after solving that:
> 
> Reviewed-by: AngeloGioacchino Del Regno 
> <angelogioacchino.delregno@...labora.com>

Yea sure, thanks for the suggestion Agnelo

Regards,
Prashanth K