Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=78981a7c6c34bddbb90da72cf6ce10953e84aad8
Commit: 78981a7c6c34bddbb90da72cf6ce10953e84aad8
Parent: af068bd1debcc76c1bc265aa01401901bf0067ed
Author: Robert Hancock <[EMAIL PROTECTED]>
AuthorDate: Tue Jan 30 00:59:18 2007 -0800
Committer: Jeff Garzik <[EMAIL PROTECTED]>
CommitDate: Tue Jan 30 09:20:39 2007 -0500
libata: fix translation for START STOP UNIT
libata's SCSI translation for the SCSI START STOP UNIT command with the
START bit clear (i.e. stopping the drive) appears to be incorrect. It
sends an ATA STANDBY command with the time period set to 0, which the code
comment says means "now", but the ATA standard says this means disable the
standby timer, which effectively does nothing. Change this to issue a
STANDBY IMMEDIATE command which will actually spin the drive down. The SAT
(SCSI/ATA Translation) standard revision 9 concurs with this choice.
Signed-off-by: Robert Hancock <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Jeff Garzik <[EMAIL PROTECTED]>
---
drivers/ata/libata-scsi.c | 9 ++++-----
1 files changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index d151cf0..73902d3 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -1022,11 +1022,10 @@ static unsigned int ata_scsi_start_stop_xlat(struct
ata_queued_cmd *qc)
}
tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
- } else {
- tf->nsect = 0; /* time period value (0 implies now) */
- tf->command = ATA_CMD_STANDBY;
- /* Consider: ATA STANDBY IMMEDIATE command */
- }
+ } else
+ /* Issue ATA STANDBY IMMEDIATE command */
+ tf->command = ATA_CMD_STANDBYNOW1;
+
/*
* Standby and Idle condition timers could be implemented but that
* would require libata to implement the Power condition mode page
-
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