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authorTony Battersby <tonyb@cybernetics.com>2007-11-12 10:00:44 -0500
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-01-11 18:22:44 -0600
commit25d7c363f2663fe399e623c9bd819258c9760bdc (patch)
treec03867708e9f66e236163e81913cdd1c516e9f12 /drivers
parentf28cd7cf8f696eafe42d1632b5a306fbf784d3cd (diff)
[SCSI] move single_lun flag from scsi_device to scsi_target
Some SCSI tape medium changers that need the BLIST_SINGLELUN flag have the medium changer at one LUN and the tape drive at a different LUN. The inquiry string of the tape drive may be different from that of the medium changer. In order for single_lun to be effective, every scsi_device under a given scsi_target must have it set. This means that there needs to be a blacklist entry for BOTH the medium changer AND the tape drive, which is impractical because some medium changers may be paired with a variety of different tape drive models. It makes more sense to put the single_lun flag in scsi_target instead of scsi_device, which causes every device at a given target ID to inherit the single_lun flag from one LUN. This makes it possible to blacklist just the medium changer and not the tape drive. Signed-off-by: Tony Battersby <tonyb@cybernetics.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/scsi/scsi_lib.c4
-rw-r--r--drivers/scsi/scsi_scan.c2
2 files changed, 3 insertions, 3 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 199b0245225..b0c59ae63a2 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -526,7 +526,7 @@ static void scsi_run_queue(struct request_queue *q)
struct Scsi_Host *shost = sdev->host;
unsigned long flags;
- if (sdev->single_lun)
+ if (scsi_target(sdev)->single_lun)
scsi_single_lun_run(sdev);
spin_lock_irqsave(shost->host_lock, flags);
@@ -1559,7 +1559,7 @@ static void scsi_request_fn(struct request_queue *q)
if (!scsi_host_queue_ready(q, shost, sdev))
goto not_ready;
- if (sdev->single_lun) {
+ if (scsi_target(sdev)->single_lun) {
if (scsi_target(sdev)->starget_sdev_user &&
scsi_target(sdev)->starget_sdev_user != sdev)
goto not_ready;
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 7e8b2045ccf..ada72af0a6d 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -865,7 +865,7 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result,
sdev->no_start_on_add = 1;
if (*bflags & BLIST_SINGLELUN)
- sdev->single_lun = 1;
+ scsi_target(sdev)->single_lun = 1;
sdev->use_10_for_rw = 1;