linux-kernel - Re: [PATCH v6] usb: common: usb-conn-gpio: Set last role to unknown before initial detection

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Message-ID: <4f22b6fd-4801-33f3-e3fe-978c465d37dc@collabora.com>
Date:   Tue, 30 May 2023 09:09:57 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Prashanth K <quic_prashk@...cinc.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 v6] usb: common: usb-conn-gpio: Set last role to unknown
 before initial detection

Il 30/05/23 06:44, 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
> initialised 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.
> 
> While at it, also handle default case for the usb_role switch
> in cdns3 to avoid build warnings.
> 
> Fixes: 4602f3bff266 ("usb: common: add USB GPIO based connection detection driver")
> Signed-off-by: Prashanth K <quic_prashk@...cinc.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>