[libata] Slightly improved no-op REQUEST SENSE, SEND DIAGNOSTIC
A few pedantic apps care about missing or lame "mandatory" SCSI
commands, so
REQUEST SENSE -- as we autosense, R.S. just returns zeroes
SEND DIAGNOSTIC -- our default (no-op) self-test succeeds, all
other requests for testing fail.
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index b399662..7955090 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -2912,6 +2912,7 @@
{
struct ata_scsi_args args;
const u8 *scsicmd = cmd->cmnd;
+ u8 tmp8;
args.dev = dev;
args.id = dev->id;
@@ -2926,7 +2927,6 @@
case SEEK_10:
case TEST_UNIT_READY:
case FORMAT_UNIT: /* FIXME: correct? */
- case SEND_DIAGNOSTIC: /* FIXME: correct? */
ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
break;
@@ -2979,8 +2979,19 @@
ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
break;
- /* mandatory commands we haven't implemented yet */
case REQUEST_SENSE:
+ ata_scsi_set_sense(cmd, 0, 0, 0);
+ cmd->result = (DRIVER_SENSE << 24);
+ done(cmd);
+ break;
+
+ case SEND_DIAGNOSTIC:
+ tmp8 = scsicmd[1] & ~(1 << 3);
+ if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
+ ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
+ else
+ ata_scsi_invalid_field(cmd, done);
+ break;
/* all other commands */
default: