linux-kernel - Re: [PATCH] serial: dw8250: Make DLF feature independent of ADDITIONAL

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Message-ID: <ZW9IASqCQi_Qi4UB@smile.fi.intel.com>
Date:   Tue, 5 Dec 2023 17:55:45 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Dawei Li <dawei.li@...ngroup.cn>
Cc:     Ilpo J�rvinen <ilpo.jarvinen@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>, jszhang@...nel.org,
        LKML <linux-kernel@...r.kernel.org>,
        linux-serial <linux-serial@...r.kernel.org>,
        set_pte_at@...look.com, stable@...nel.org
Subject: Re: [PATCH] serial: dw8250: Make DLF feature independent of
 ADDITIONAL_FEATURE

On Tue, Dec 05, 2023 at 09:55:44AM +0800, Dawei Li wrote:
> On Mon, Dec 04, 2023 at 03:29:35PM +0200, Andy Shevchenko wrote:
> > On Mon, Dec 04, 2023 at 03:20:09PM +0200, Ilpo Järvinen wrote:
> > > On Mon, 4 Dec 2023, Dawei Li wrote:

...

> > > The very same code change is already in tty-next (from another author).
> > 
> > For your convenience:
> > 
> > d804987153e7 ("serial: 8250_dw: Decouple DLF register check from UCV")
> 
> [sigh]
> 
> Apparently I thought tty/for-linus is the "bug fixing" branch for tty by
> mistake, and didn't realize the same fix patch has been landed in tty-next
> for a while.
> 
> Thanks for the update.
> 
> Anyway, I believe the fixing patch should cc stable and be getting backported?
> I hit the bug on 5.10.x, it's possible the bug has been there before that.

When that commit meets upstream you can always resend it for stable. The process
is documented.

-- 
With Best Regards,
Andy Shevchenko