netdev - Re: [PATCH v2 net] ptp: ocp: adjust serial port symlink creation

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Date: Wed, 5 Jun 2024 11:14:28 +0100
From: Vadim Fedorenko <vadim.fedorenko@...ux.dev>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Jakub Kicinski <kuba@...nel.org>, Jiri Slaby <jirislaby@...nel.org>,
 Jonathan Lemon <jonathan.lemon@...il.com>, linux-serial@...r.kernel.org,
 netdev@...r.kernel.org
Subject: Re: [PATCH v2 net] ptp: ocp: adjust serial port symlink creation

On 05/06/2024 11:05, Greg Kroah-Hartman wrote:
> On Wed, Jun 05, 2024 at 12:53:13AM +0100, Vadim Fedorenko wrote:
>> On 04/06/2024 12:50, Greg Kroah-Hartman wrote:
>>> On Wed, May 22, 2024 at 01:39:21PM +0100, Vadim Fedorenko wrote:
>>>> On 10/05/2024 12:13, Greg Kroah-Hartman wrote:
>>>>> On Fri, May 10, 2024 at 11:04:05AM +0000, Vadim Fedorenko wrote:
>>>>>> The commit b286f4e87e32 ("serial: core: Move tty and serdev to be children
>>>>>> of serial core port device") changed the hierarchy of serial port devices
>>>>>> and device_find_child_by_name cannot find ttyS* devices because they are
>>>>>> no longer directly attached. Add some logic to restore symlinks creation
>>>>>> to the driver for OCP TimeCard.
>>>>>>
>>>>>> Fixes: b286f4e87e32 ("serial: core: Move tty and serdev to be children of serial core port device")
>>>>>> Signed-off-by: Vadim Fedorenko <vadim.fedorenko@...ux.dev>
>>>>>> ---
>>>>>> v2:
>>>>>>     add serial/8250 maintainers
>>>>>> ---
>>>>>>     drivers/ptp/ptp_ocp.c | 30 +++++++++++++++++++++---------
>>>>>>     1 file changed, 21 insertions(+), 9 deletions(-)
>>>>>
>>>>> Hi,
>>>>>
>>>>> This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
>>>>> a patch that has triggered this response.  He used to manually respond
>>>>> to these common problems, but in order to save his sanity (he kept
>>>>> writing the same thing over and over, yet to different people), I was
>>>>> created.  Hopefully you will not take offence and will fix the problem
>>>>> in your patch and resubmit it so that it can be accepted into the Linux
>>>>> kernel tree.
>>>>>
>>>>> You are receiving this message because of the following common error(s)
>>>>> as indicated below:
>>>>>
>>>>> - You have marked a patch with a "Fixes:" tag for a commit that is in an
>>>>>      older released kernel, yet you do not have a cc: stable line in the
>>>>>      signed-off-by area at all, which means that the patch will not be
>>>>>      applied to any older kernel releases.  To properly fix this, please
>>>>>      follow the documented rules in the
>>>>>      Documentation/process/stable-kernel-rules.rst file for how to resolve
>>>>>      this.
>>>>>
>>>>> If you wish to discuss this problem further, or you have questions about
>>>>> how to resolve this issue, please feel free to respond to this email and
>>>>> Greg will reply once he has dug out from the pending patches received
>>>>> from other developers.
>>>>
>>>> Hi Greg!
>>>>
>>>> Just gentle ping, I'm still looking for better solution for serial
>>>> device lookup in TimeCard driver.
>>>
>>> See my comment on the other patch in this thread.
>>>
>>> In short, you shouldn't need to do any of this.
>>
>> Got it, thanks. I'll try to find another way.
> 
> Wait, no, please just remove all that, it should not be needed at all.

Do you mean remove symlinks from the driver? We have open-source
user-space software which relies on them to discover proper devices. If
I remove symlinks it will break the software.