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

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Date:   Wed, 13 Jul 2022 23:28:20 +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 2022-07-13, Todd Brandt <todd.e.brandt@...ux.intel.com> wrote:
> URGENT: Removing the commit FIXES the issue.
>
> I just ran a 5.19.0-rc6 kernel with the offending commit removed and
> it fixed the problem completely on all 3 machines.

I believe to have found the issue. A patch was posted to bugzilla:

https://bugzilla.kernel.org/attachment.cgi?id=301413

Please test this. Thanks.

John Ogness