scsi: sd: Rework asynchronous resume support
authorBart Van Assche <bvanassche@acm.org>
Thu, 30 Jun 2022 19:57:03 +0000 (12:57 -0700)
committerMartin K. Petersen <martin.petersen@oracle.com>
Thu, 7 Jul 2022 21:06:39 +0000 (17:06 -0400)
commit88f1669019bd62b3009a3cebf772fbaaa21b9f38
treea33e057d47f7c13751c3c9e8ed9cfb40013bf47e
parent90552cd2d1f962478f1bb426c686540cbd145bec
scsi: sd: Rework asynchronous resume support

For some technologies, e.g. an ATA bus, resuming can take multiple
seconds. Waiting for resume to finish can cause a very noticeable delay.
Hence this commit that restores the behavior from before "scsi: core: pm:
Rely on the device driver core for async power management" for most SCSI
devices.

This commit introduces a behavior change: if the START command fails, do
not consider this as a SCSI disk resume failure.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=215880
Link: https://lore.kernel.org/r/20220630195703.10155-3-bvanassche@acm.org
Fixes: a19a93e4c6a9 ("scsi: core: pm: Rely on the device driver core for async power management")
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: John Garry <john.garry@huawei.com>
Cc: ericspero@icloud.com
Cc: jason600.groome@gmail.com
Tested-by: jason600.groome@gmail.com
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
drivers/scsi/sd.c
drivers/scsi/sd.h