linux-kernel - Re: [PATCH 2/2] serial: imx: fix endless loop during suspend

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Message-ID: <CAOMZO5Dv1TO6QfiqjSwzgU8sdDHrtDqDkDESFFovscCtNMdCUg@mail.gmail.com>
Date:   Tue, 2 Jan 2018 17:31:49 -0200
From:   Fabio Estevam <festevam@...il.com>
To:     Martin Kaiser <martin@...ser.cx>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>,
        Sascha Hauer <kernel@...gutronix.de>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>, linux-serial@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        stable <stable@...r.kernel.org>
Subject: Re: [PATCH 2/2] serial: imx: fix endless loop during suspend

Hi Martin,

On Tue, Jan 2, 2018 at 2:15 PM, Martin Kaiser <martin@...ser.cx> wrote:

> Fabio, could you post the output of
>
> cat /sys/kernel/debug/suspend_stats
>
> after supend failed, to confirm that we're failing below
> device_suspend_noirq()?

Here it goes:

# cat /sys/kernel/debug/suspend_stats
success: 0
fail: 1
failed_freeze: 0
failed_prepare: 0
failed_suspend: 0
failed_suspend_late: 0
failed_suspend_noirq: 1
failed_resume: 0
failed_resume_early: 0
failed_resume_noirq: 0
failures:
  last_failed_dev:

  last_failed_errno:    -16
                        0
  last_failed_step:     suspend_noirq