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[SCSI] initialize max_target_blocked in scsi_alloc_target

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This patch initializes the max_target_blocked field of a scsi target
structure so that a queuecommand return value of
SCSI_MLQUEUE_TARGET_BUSY will actually result in having the
scsi_queue_insert blocking the device queue before requeuing the
command and running the queue.  Otherwise, can and does cause livelock
on single CPU configurations if/when open-iSCSI software initiator's
command PDU window fills.

Signed-off-by: Ed Goggin <egoggin@vmware.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Edward Goggin 2009-04-09 10:02:22 -07:00 committed by James Bottomley
parent 5df6d737dd
commit c53a284f8b
1 changed files with 1 additions and 0 deletions
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drivers/scsi/scsi_scan.c
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@ -425,6 +425,7 @@ static struct scsi_target *scsi_alloc_target(struct device *parent,
INIT_LIST_HEAD(&starget->devices);
starget->state = STARGET_CREATED;
starget->scsi_level = SCSI_2;
starget->max_target_blocked = SCSI_DEFAULT_TARGET_BLOCKED;
retry:
spin_lock_irqsave(shost->host_lock, flags);