From: Robert Hancock Date: Tue, 30 Jan 2007 08:59:18 +0000 (-0800) Subject: libata: fix translation for START STOP UNIT X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=78981a7c6c34bddbb90da72cf6ce10953e84aad8;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git 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 Signed-off-by: Andrew Morton Signed-off-by: Jeff Garzik --- diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index d151cf057ef2..73902d335767 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