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Message-ID: <6b50524f-4f24-d14e-9d3f-f03f25ca549b@windriver.com>
Date:   Sat, 26 Nov 2022 09:41:46 +0800
From:   "Wang, Xiaolei" <xiaolei.wang@...driver.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>
Cc:     hkallweit1@...il.com, linux@...linux.org.uk, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [v2][PATCH 1/1] net: phy: Add link between phy dev and mac dev

add Florian

thanks

xiaolei

On 11/26/2022 5:43 AM, Andrew Lunn wrote:
> CAUTION: This email comes from a non Wind River email account!
> Do not click links or open attachments unless you recognize the sender and know the content is safe.
>
> On Fri, Nov 25, 2022 at 12:12:06PM +0800, Xiaolei Wang wrote:
>> If the external phy used by current mac interface is
>> managed by another mac interface, it means that this
>> network port cannot work independently, especially
>> when the system suspend and resume, the following
>> trace may appear, so we should create a device link
>> between phy dev and mac dev.
>>
>>    WARNING: CPU: 0 PID: 24 at drivers/net/phy/phy.c:983 phy_error+0x20/0x68
>>    Modules linked in:
>>    CPU: 0 PID: 24 Comm: kworker/0:2 Not tainted 6.1.0-rc3-00011-g5aaef24b5c6d-dirty #34
>>    Hardware name: Freescale i.MX6 SoloX (Device Tree)
>>    Workqueue: events_power_efficient phy_state_machine
>>    unwind_backtrace from show_stack+0x10/0x14
>>    show_stack from dump_stack_lvl+0x68/0x90
>>    dump_stack_lvl from __warn+0xb4/0x24c
>>    __warn from warn_slowpath_fmt+0x5c/0xd8
>>    warn_slowpath_fmt from phy_error+0x20/0x68
>>    phy_error from phy_state_machine+0x22c/0x23c
>>    phy_state_machine from process_one_work+0x288/0x744
>>    process_one_work from worker_thread+0x3c/0x500
>>    worker_thread from kthread+0xf0/0x114
>>    kthread from ret_from_fork+0x14/0x28
>>    Exception stack(0xf0951fb0 to 0xf0951ff8)
>>
>> Signed-off-by: Xiaolei Wang <xiaolei.wang@...driver.com>
> This needs Florians review, since for v1 he thinks it will cause
> regressions.
>
>          Andrew

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