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Message-ID: <CAAd53p665S+dfOvWZt2UwTs=VrxE=FtpqjzUrSuLKR5tBpAa9Q@mail.gmail.com>
Date: Wed, 14 Jun 2023 13:37:07 +0800
From: Kai-Heng Feng <kai.heng.feng@...onical.com>
To: Damien Le Moal <dlemoal@...nel.org>
Cc: Joe Breuer <linux-kernel@...reuer.net>,
Bart Van Assche <bvanassche@....org>,
Bagas Sanjaya <bagasdotme@...il.com>,
Pavel Machek <pavel@....cz>,
"Rafael J. Wysocki" <rafael@...nel.org>,
Len Brown <len.brown@...el.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Kees Cook <keescook@...omium.org>,
Tony Luck <tony.luck@...el.com>,
"Guilherme G. Piccoli" <gpiccoli@...lia.com>,
Thorsten Leemhuis <linux@...mhuis.info>,
"James E.J. Bottomley" <jejb@...ux.ibm.com>,
"Martin K. Petersen" <martin.petersen@...cle.com>,
Phillip Potter <phil@...lpotter.co.uk>,
Linux Power Management <linux-pm@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Linux Hardening <linux-hardening@...r.kernel.org>,
Linux Regressions <regressions@...ts.linux.dev>,
Linux SCSI <linux-scsi@...r.kernel.org>,
Alan Stern <stern@...land.harvard.edu>,
Dan Williams <dan.j.williams@...el.com>,
Hannes Reinecke <hare@...e.com>,
Adrian Hunter <adrian.hunter@...el.com>,
Martin Kepplinger <martin.kepplinger@...i.sm>
Subject: Re: Fwd: Waking up from resume locks up on sr device
On Wed, Jun 14, 2023 at 12:49 PM Damien Le Moal <dlemoal@...nel.org> wrote:
>
> On 6/11/23 18:05, Joe Breuer wrote:
> > I'm the reporter of this issue.
> >
> > I just tried this patch against 6.3.4, and it completely fixes my
> > suspend/resume issue.
> >
> > The optical drive stays usable after resume, even suspending/resuming
> > during playback of CDDA content works flawlessly and playback resumes
> > seamlessly after system resume.
> >
> > So, from my perspective: Good one!
>
> In place of Bart's fix, could you please try this patch ?
Issue still persists at my end, when /sys/power/pm_async is 0.
device_pm_wait_for_dev() in its current form is only usable for async case.
Kai-Heng
>
> diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
> index b80e68000dd3..a81eb4f882ab 100644
> --- a/drivers/ata/libata-eh.c
> +++ b/drivers/ata/libata-eh.c
> @@ -4006,9 +4006,32 @@ static void ata_eh_handle_port_resume(struct
> ata_port *ap)
> /* tell ACPI that we're resuming */
> ata_acpi_on_resume(ap);
>
> - /* update the flags */
> spin_lock_irqsave(ap->lock, flags);
> +
> + /* Update the flags */
> ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED);
> +
> + /*
> + * Resuming the port will trigger a rescan of the ATA device(s)
> + * connected to it. Before scheduling the rescan, make sure that
> + * the associated scsi device(s) are fully resumed as well.
> + */
> + ata_for_each_link(link, ap, HOST_FIRST) {
> + ata_for_each_dev(dev, link, ENABLED) {
> + struct scsi_device *sdev = dev->sdev;
> +
> + if (!sdev)
> + continue;
> + if (scsi_device_get(sdev))
> + continue;
> +
> + spin_unlock_irqrestore(ap->lock, flags);
> + device_pm_wait_for_dev(&ap->tdev,
> + &sdev->sdev_gendev);
> + scsi_device_put(sdev);
> + spin_lock_irqsave(ap->lock, flags);
> + }
> + }
> spin_unlock_irqrestore(ap->lock, flags);
> }
> #endif /* CONFIG_PM */
>
> Thanks !
>
> --
> Damien Le Moal
> Western Digital Research
>
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