linux-kernel - Re: [PATCH] tty: serial: samsung

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Message-ID: <c5413c42-b728-b88b-4229-9d4e3943413e@marcan.st>
Date:   Mon, 2 May 2022 21:39:42 +0900
From:   Hector Martin <marcan@...can.st>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Sven Peter <sven@...npeter.dev>,
        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-serial@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tty: serial: samsung_tty: Fix suspend/resume on S5L

On 02/05/2022 20.44, Greg Kroah-Hartman wrote:
> On Mon, May 02, 2022 at 06:25:05PM +0900, Hector Martin wrote:
>> We were restoring the IRQ masks then clearing them again, because
>> ucon_mask wasn't set properly. Adding that makes suspend/resume
>> work as intended.
>>
>> Signed-off-by: Hector Martin <marcan@...can.st>
>> ---
>>  drivers/tty/serial/samsung_tty.c | 1 +
>>  include/linux/serial_s3c.h       | 3 +++
>>  2 files changed, 4 insertions(+)
> 
> Does this fix a specific older commit?
> 
> And should it be backported to older stable kernels?

It does fix the commit that introduced this device support in general; I
can add a Fixes line for that. I don't think anyone cares about
backporting though, since there are other fairly critical devices that
don't have support outright and there's still work to do before
suspend/resume is generally usable on these machines.

-- 
Hector Martin (marcan@...can.st)
Public Key: https://mrcn.st/pub