Re: Fwd: Waking up from resume locks up on sr device

[Damien Le Moal <dlemoal@kernel.org>]

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 ?

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