SAT-3 says REQUEST SENSE should issue CHECK POWER and return
a sense status indicating the drive's power status.
---
drivers/ata/libata-scsi.c | 40 ++++++++++++++++++++++++++++++++++------
1 file changed, 34 insertions(+), 6 deletions(-)
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index f92eb21..8b17352 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -3313,6 +3313,38 @@ static unsigned int ata_scsi_mode_select_xlat(struct
ata_queued_cmd *qc)
return 1;
}
+static void ata_scsi_request_sense_complete(struct ata_queued_cmd *qc)
+{
+ struct scsi_cmnd *cmd = qc->scsicmd;
+ cmd->result = (DRIVER_SENSE << 24);
+ if (qc->result_tf.nsect == 0)
+ /* POWER STATE CHANGE TO STANDBY */
+ {
+ scsi_build_sense_buffer(0, cmd->sense_buffer, 0, 0x5E, 0x43);
+ }
+ else scsi_build_sense_buffer(0, cmd->sense_buffer, 0, 0, 0);
+ qc->scsidone(cmd);
+ ata_qc_free(qc);
+}
+
+/**
+ * ata_scsi_request_sense_xlat - Simulate REQUEST SENSE command
+ * @qc: Storage for translated ATA taskfile
+ *
+ * Converts a REQUEST SENSE command to an ATA CHECK POWER MODE taskfile.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host lock)
+ */
+static unsigned int ata_scsi_request_sense_xlat(struct ata_queued_cmd *qc)
+{
+ qc->tf.command = ATA_CMD_CHK_POWER;
+ qc->flags |= ATA_QCFLAG_RESULT_TF;
+ qc->tf.protocol = ATA_PROT_NODATA;
+ qc->complete_fn = ata_scsi_request_sense_complete;
+ return 0;
+}
+
/**
* ata_get_xlat_func - check if SCSI to ATA translation is possible
* @dev: ATA device
@@ -3360,6 +3392,8 @@ static inline ata_xlat_func_t ata_get_xlat_func(struct
ata_device *dev, u8 cmd)
case START_STOP:
return ata_scsi_start_stop_xlat;
+ case REQUEST_SENSE:
+ return ata_scsi_request_sense_xlat;
}
return NULL;
@@ -3565,12 +3599,6 @@ void ata_scsi_simulate(struct ata_device *dev, struct
scsi_cmnd *cmd)
ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
break;
- case REQUEST_SENSE:
- ata_scsi_set_sense(cmd, 0, 0, 0);
- cmd->result = (DRIVER_SENSE << 24);
- cmd->scsi_done(cmd);
- break;
-
/* if we reach this, then writeback caching is disabled,
* turning this into a no-op.
*/
--
1.8.3.2
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