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| author | Tony Battersby <tonyb@cybernetics.com> | 2007-11-12 10:00:44 -0500 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-01-11 18:22:44 -0600 |
| commit | 25d7c363f2663fe399e623c9bd819258c9760bdc (patch) | |
| tree | c03867708e9f66e236163e81913cdd1c516e9f12 /drivers/scsi/scsi_lib.c | |
| parent | f28cd7cf8f696eafe42d1632b5a306fbf784d3cd (diff) | |
| download | linux-25d7c363f2663fe399e623c9bd819258c9760bdc.tar.gz linux-25d7c363f2663fe399e623c9bd819258c9760bdc.tar.bz2 linux-25d7c363f2663fe399e623c9bd819258c9760bdc.zip | |
[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/scsi/scsi_lib.c')
| -rw-r--r-- | drivers/scsi/scsi_lib.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 199b02452259..b0c59ae63a2f 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; |