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SATA: Blacklisting of systems that spin off disks during ACPI power off 

Introduce new libata flags ATA_FLAG_NO_POWEROFF_SPINDOWN and
ATA_FLAG_NO_HIBERNATE_SPINDOWN that, if set, will prevent disks from
being spun off during system power off and hibernation, respectively
(to handle the hibernation case we need the new system state
SYSTEM_HIBERNATE_ENTER that can be checked against by libata, in
analogy with SYSTEM_POWER_OFF).

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Rafael J. Wysocki 2009-01-19 20:56:43 +01:00 committed by Jeff Garzik
parent d7b1956fed
commit 2a6e58d273
2 changed files with 19 additions and 3 deletions
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20
drivers/ata/libata-scsi.c
View File

@ -46,6 +46,7 @@
#include <linux/libata.h>
#include <linux/hdreg.h>
#include <linux/uaccess.h>
#include <linux/suspend.h>
#include "libata.h"
@ -1303,6 +1304,17 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
} else {
/* Some odd clown BIOSen issue spindown on power off (ACPI S4
* or S5) causing some drives to spin up and down again.
*/
if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
system_state == SYSTEM_POWER_OFF)
goto skip;
if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
system_entering_hibernation())
goto skip;
/* XXX: This is for backward compatibility, will be
* removed. Read Documentation/feature-removal-schedule.txt
* for more info.
@ -1326,8 +1338,7 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
scmd->scsi_done = qc->scsidone;
qc->scsidone = ata_delayed_done;
}
scmd->result = SAM_STAT_GOOD;
return 1;
goto skip;
}
/* Issue ATA STANDBY IMMEDIATE command */
@ -1343,10 +1354,13 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
return 0;
invalid_fld:
invalid_fld:
ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
/* "Invalid field in cbd" */
return 1;
skip:
scmd->result = SAM_STAT_GOOD;
return 1;
}

2
include/linux/libata.h
View File

@ -187,6 +187,8 @@ enum {
ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
* doesn't handle PIO interrupts */
ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
ATA_FLAG_DEBUGMSG = (1 << 13),
ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */