Problem reported/corrected by Michael Reed [mdr@sgi.com]:

  We have a 2312 that puts the 8.00.00b12-k qla2xxx driver
  into an infinite loop with a solid interrupt, 0x8008,
  hcsr = 0x7430, risc status register 0x40008110,
  immediately after enabling parity on the board.

  It looks as though the early out test in
  qla_isr.c:qla2x00_intr_handler() against stat is broken.
  HSR_RISC_PAUSED is set.  Also, there's a stale mailbox
  completion flagged (stat&0xff) which will short circuit
  the default case in the switch if it got that far.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>