diff options
| author | Rafael J. Wysocki <rjw@sisk.pl> | 2009-01-19 20:56:43 +0100 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2009-01-27 02:15:49 -0500 |
| commit | 2a6e58d2731dcc05dafa7f976d935e0f0627fcd7 (patch) | |
| tree | 836d0ec85dccde709aeaaedb3b7686ac51805ad1 /drivers | |
| parent | d7b1956fed33d30c4815e848fd7a143722916868 (diff) | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ata/libata-scsi.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index a1a6e6298c3..3c4c5ae277b 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -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; } |