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| 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 /drivers/ata/libata-scsi.c | |
| parent | 668108d73bbb1ae85f01db38d6be822fd28ece1f (diff) | |
| download | kernel-crypto-e31e8531d668c9c4dc7883054788f89805188003.tar.gz kernel-crypto-e31e8531d668c9c4dc7883054788f89805188003.tar.xz kernel-crypto-e31e8531d668c9c4dc7883054788f89805188003.zip | |
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>
Diffstat (limited to 'drivers/ata/libata-scsi.c')
| -rw-r--r-- | drivers/ata/libata-scsi.c | 7 |
1 files changed, 7 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 */ |