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authorDamien Le Moal <dlemoal@kernel.org>2023-10-25 09:46:12 +0300
committerDamien Le Moal <dlemoal@kernel.org>2023-10-27 04:00:19 +0300
commit24eca2dce0f8d19db808c972b0281298d0bafe99 (patch)
treeeef0dbcf867b084687b949f42201fe80f3fcf7c0 /drivers/ata
parent626b13f015e080e434b1dee9a0c116ddbf4fb695 (diff)
downloadlinux-24eca2dce0f8d19db808c972b0281298d0bafe99.tar.xz
scsi: sd: Introduce manage_shutdown device flag
Commit aa3998dbeb3a ("ata: libata-scsi: Disable scsi device manage_system_start_stop") change setting the manage_system_start_stop flag to false for libata managed disks to enable libata internal management of disk suspend/resume. However, a side effect of this change is that on system shutdown, disks are no longer being stopped (set to standby mode with the heads unloaded). While this is not a critical issue, this unclean shutdown is not recommended and shows up with increased smart counters (e.g. the unexpected power loss counter "Unexpect_Power_Loss_Ct"). Instead of defining a shutdown driver method for all ATA adapter drivers (not all of them define that operation), this patch resolves this issue by further refining the sd driver start/stop control of disks using the new flag manage_shutdown. If this new flag is set to true by a low level driver, the function sd_shutdown() will issue a START STOP UNIT command with the start argument set to 0 when a disk needs to be powered off (suspended) on system power off, that is, when system_state is equal to SYSTEM_POWER_OFF. Similarly to the other manage_xxx flags, the new manage_shutdown flag is exposed through sysfs as a read-write device attribute. To avoid any confusion between manage_shutdown and manage_system_start_stop, the comments describing these flags in include/scsi/scsi.h are also improved. Fixes: aa3998dbeb3a ("ata: libata-scsi: Disable scsi device manage_system_start_stop") Cc: stable@vger.kernel.org Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218038 Link: https://lore.kernel.org/all/cd397c88-bf53-4768-9ab8-9d107df9e613@gmail.com/ Signed-off-by: Damien Le Moal <dlemoal@kernel.org> Reviewed-by: Niklas Cassel <niklas.cassel@wdc.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: James Bottomley <James.Bottomley@HansenPartnership.com> Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/libata-scsi.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index a371b497035e..3a957c4da409 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -1053,10 +1053,11 @@ int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev)
/*
* Ask the sd driver to issue START STOP UNIT on runtime suspend
- * and resume only. For system level suspend/resume, devices
- * power state is handled directly by libata EH.
+ * and resume and shutdown only. For system level suspend/resume,
+ * devices power state is handled directly by libata EH.
*/
sdev->manage_runtime_start_stop = true;
+ sdev->manage_shutdown = true;
}
/*