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libata: track spindown status and skip spindown_compat if possible

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Our assumption that most distros issue STANDBYNOW seems wrong.  The
upstream sysvinit and thus many distros including gentoo and opensuse
don't take any action for libata disks on spindown.  We can skip
compat handling for these distros so that they don't need to update
anything to take advantage of kernel-side shutdown.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2007-05-15 12:29:22 +02:00 committed by Jeff Garzik
parent da071b42f7
commit 13b8d09f5d
2 changed files with 10 additions and 0 deletions
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9
drivers/ata/libata-scsi.c
View File

@ -967,6 +967,7 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
* for more info.
*/
if (ata_spindown_compat &&
(qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
(system_state == SYSTEM_HALT ||
system_state == SYSTEM_POWER_OFF)) {
static unsigned long warned = 0;
@ -1394,6 +1395,14 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
}
}
/* XXX: track spindown state for spindown_compat */
if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
qc->tf.command == ATA_CMD_STANDBYNOW1))
qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
else if (likely(system_state != SYSTEM_HALT &&
system_state != SYSTEM_POWER_OFF))
qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
if (need_sense && !ap->ops->error_handler)
ata_dump_status(ap->print_id, &qc->result_tf);

1
include/linux/libata.h
View File

@ -140,6 +140,7 @@ enum {
ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */
ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */
ATA_DFLAG_SPUNDOWN = (1 << 10), /* XXX: for spindown_compat */
ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
ATA_DFLAG_DETACH = (1 << 16),