diff options
| author | Damien Le Moal <dlemoal@kernel.org> | 2023-11-21 07:56:31 +0900 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-11-24 20:44:21 -0500 |
| commit | b09d7f8fd50f6e93cbadd8d27fde178f745b42a1 (patch) | |
| tree | 95a853c9f05da92bdb99480e099416aa079bc50a /drivers/ata/libata-scsi.c | |
| parent | 6371be7aeb986905bb60ec73d002fc02343393b4 (diff) | |
scsi: sd: Fix system start for ATA devices
It is not always possible to keep a device in the runtime suspended state
when a system level suspend/resume cycle is executed. E.g. for ATA devices
connected to AHCI adapters, system resume resets the ATA ports, which
causes connected devices to spin up. In such case, a runtime suspended disk
will incorrectly be seen with a suspended runtime state because the device
is not resumed by sd_resume_system(). The power state seen by the user is
different than the actual device physical power state.
Fix this issue by introducing the struct scsi_device flag
force_runtime_start_on_system_start. When set, this flag causes
sd_resume_system() to request a runtime resume operation for runtime
suspended devices. This results in the user seeing the device runtime_state
as active after a system resume, thus correctly reflecting the device
physical power state.
Fixes: 9131bff6a9f1 ("scsi: core: pm: Only runtime resume if necessary")
Cc: <stable@vger.kernel.org>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20231120225631.37938-3-dlemoal@kernel.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/ata/libata-scsi.c')
| -rw-r--r-- | drivers/ata/libata-scsi.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 63317449f6ea..0a0f483124c3 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -1055,9 +1055,14 @@ 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 and shutdown only. For system level suspend/resume, * devices power state is handled directly by libata EH. + * Given that disks are always spun up on system resume, also + * make sure that the sd driver forces runtime suspended disks + * to be resumed to correctly reflect the power state of the + * device. */ sdev->manage_runtime_start_stop = 1; sdev->manage_shutdown = 1; + sdev->force_runtime_start_on_system_start = 1; } /* |