If you examine the queue_work() routine you'll see that it returns
1 on success, 0 if the work is already queued.

This patch corrects the source code documentation for the
scsi_queue_work function.
Signed-off-by: NMichael Reed <mdr@sgi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>