linux-kernel - Re: [PATCH] net: usb: lan78xx: Fix suspend/resume PHY register access error

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Date:   Thu, 12 Dec 2019 10:57:56 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     cristian.birsan@...rochip.com
Cc:     woojung.huh@...rochip.com, UNGLinuxDriver@...rochip.com,
        netdev@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: usb: lan78xx: Fix suspend/resume PHY register
 access error

From: Cristian Birsan <cristian.birsan@...rochip.com>
Date: Thu, 12 Dec 2019 13:52:47 +0200

> Lan78xx driver accesses the PHY registers through MDIO bus over USB
> connection. When performing a suspend/resume, the PHY registers can be
> accessed before the USB connection is resumed. This will generate an
> error and will prevent the device to resume correctly.
> This patch adds the dependency between the MDIO bus and USB device to
> allow correct handling of suspend/resume.
> 
> Fixes: ce85e13ad6ef ("lan78xx: Update to use phylib instead of mii_if_info.")
> Signed-off-by: Cristian Birsan <cristian.birsan@...rochip.com>

Applied and queued up for -stable.