diff options
| author | Tejun Heo <htejun@gmail.com> | 2007-10-25 18:30:36 +0900 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-10-29 06:15:25 -0400 |
| commit | 054a5fbaceb2eb3a31ea843c1cf0b8e10b91478c (patch) | |
| tree | cbf21985f3894b11fe00666cef8ac33bae4f007d /include | |
| parent | 4dbfa39b6c95eb9d0aedb5bd00bb552b91c31e3d (diff) | |
libata: track SLEEP state and issue SRST to wake it up
ATA devices in SLEEP mode don't respond to any commands. SRST is
necessary to wake it up. Till now, when a command is issued to a
device in SLEEP mode, the command times out, which makes EH reset the
device and retry the command after that, causing a long delay.
This patch makes libata track SLEEP state and issue SRST automatically
if a command is about to be issued to a device in SLEEP.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Bruce Allen <ballen@gravity.phys.uwm.edu>
Cc: Andrew Paprocki <andrew@ishiboo.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/ata.h | 1 | ||||
| -rw-r--r-- | include/linux/libata.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/ata.h b/include/linux/ata.h index 8263a7b74d34..e21c002c3a4a 100644 --- a/include/linux/ata.h +++ b/include/linux/ata.h @@ -180,6 +180,7 @@ enum { ATA_CMD_VERIFY_EXT = 0x42, ATA_CMD_STANDBYNOW1 = 0xE0, ATA_CMD_IDLEIMMEDIATE = 0xE1, + ATA_CMD_SLEEP = 0xE6, ATA_CMD_INIT_DEV_PARAMS = 0x91, ATA_CMD_READ_NATIVE_MAX = 0xF8, ATA_CMD_READ_NATIVE_MAX_EXT = 0x27, diff --git a/include/linux/libata.h b/include/linux/libata.h index 6fd24e03622e..2f0fc636b4b6 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -138,6 +138,7 @@ enum { ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */ ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */ ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */ + ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */ ATA_DFLAG_INIT_MASK = (1 << 16) - 1, ATA_DFLAG_DETACH = (1 << 16), |