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authorTejun Heo <htejun@gmail.com>2007-10-25 18:30:36 +0900
committerJeff Garzik <jeff@garzik.org>2007-10-29 06:15:25 -0400
commit054a5fbaceb2eb3a31ea843c1cf0b8e10b91478c (patch)
treecbf21985f3894b11fe00666cef8ac33bae4f007d /include
parent4dbfa39b6c95eb9d0aedb5bd00bb552b91c31e3d (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.h1
-rw-r--r--include/linux/libata.h1
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),

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