linux-kernel - Re: PNP0501 serial driver takes almost 2 seconds to suspend/resume (printk issue)

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Message-ID: <8735f2x5q4.fsf@jogness.linutronix.de>
Date:   Fri, 15 Jul 2022 08:20:27 +0206
From:   John Ogness <john.ogness@...utronix.de>
To:     todd.e.brandt@...ux.intel.com,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Petr Mladek <pmladek@...e.com>, rafael.j.wysocki@...el.com,
        len.brown@...el.com
Cc:     Andy Shevchenko <andy.shevchenko@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:SERIAL DRIVERS" <linux-serial@...r.kernel.org>,
        Steven Rostedt <rostedt@...dmis.org>
Subject: Re: PNP0501 serial driver takes almost 2 seconds to suspend/resume
 (printk issue)

On 2022-07-14, Todd Brandt <todd.e.brandt@...ux.intel.com> wrote:
> I ran with your fix on 30 systems. On the 7 machines where this
> problem appears, the patch fixes it completely. On the 23 machines
> where this problem does not appear, there are no issues or
> regressions.
>
> Fix verified, thank you!

I have posted [0] an official patch for 5.19-rc7. For the posted
version, I added more information to the commit message and comments.

Todd, thanks for reporting and testing!

John

[0] https://lore.kernel.org/lkml/20220715061042.373640-1-john.ogness@linutronix.de