Fix several problems when handling commands issued to tape devices:

  	1) insure commands are not prematurely returned to the mid-layer
  	   with a failed status during loop/fabric transitions.

  	2) tape commands tend to have rather 'long' timeout values,
  	   unfortunately, as the these values increase into the 17 to
  	   20 minute range (and larger), the cumulative skew of the
  	   RISC's own timer result in commands being held for seconds
  	   beyond their defined timeout values.  Compensate for this
  	   in the driver's command timeout function.

 drivers/scsi/qla2xxx/qla_def.h  |    3 +
 drivers/scsi/qla2xxx/qla_init.c |    4 ++
 drivers/scsi/qla2xxx/qla_isr.c  |   10 ++---
 drivers/scsi/qla2xxx/qla_os.c   |   74 ++++++++++++++++++++++++++++++++++++----
 4 files changed, 79 insertions(+), 12 deletions(-)