diff options
| author | Tejun Heo <htejun@gmail.com> | 2007-09-23 13:14:13 +0900 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-10-12 14:55:41 -0400 |
| commit | e31e8531d668c9c4dc7883054788f89805188003 (patch) | |
| tree | 9c3762792344d24c996d6459409456664a2e381b | |
| parent | 668108d73bbb1ae85f01db38d6be822fd28ece1f (diff) | |
libata-pmp-prep: implement ATA_HORKAGE_SKIP_PM
Some pseudo devices fail PM commands unnecessarily aborting system
suspend. Implement ATA_HORKAGE_SKIP_PM which makes libata skip PM
commands for these devices.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
| -rw-r--r-- | drivers/ata/libata-scsi.c | 7 | ||||
| -rw-r--r-- | include/linux/libata.h | 1 |
2 files changed, 8 insertions, 0 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 8ca2caeed01..451f79c6fba 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -944,6 +944,13 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) goto invalid_fld; /* LOEJ bit set not supported */ if (((cdb[4] >> 4) & 0xf) != 0) goto invalid_fld; /* power conditions not supported */ + + if (qc->dev->horkage & ATA_HORKAGE_SKIP_PM) { + /* the device lacks PM support, finish without doing anything */ + scmd->result = SAM_STAT_GOOD; + return 1; + } + if (cdb[4] & 0x1) { tf->nsect = 1; /* 1 sector, lba=0 */ diff --git a/include/linux/libata.h b/include/linux/libata.h index 2bd1d26c9c8..56b21877111 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -329,6 +329,7 @@ enum { ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */ + ATA_HORKAGE_SKIP_PM = (1 << 5), /* Skip PM operations */ }; enum hsm_task_states { |