tree 6b24f9ffc5ba1ebc75847e28c3442b2b76eba11d
parent 1d3324c382b1a617eb567e3650dcb51f22dfec9a
author Matthew R. Ochs <mrochs@linux.vnet.ibm.com> 1472848803 -0500
committer Martin K. Petersen <martin.petersen@oracle.com> 1473871580 -0400

scsi: cxlflash: Improve EEH recovery time

When an EEH occurs during device initialization, the port timeout logic
can cause excessive delays as MMIO reads will fail. Depending on where
they are experienced, these delays can lead to a prolonged reset,
causing an unnecessary triggering of other timeout logic in the SCSI
stack or user applications.

To expedite recovery, the port timeout logic is updated to decay the
timeout at a much faster rate when in the presence of a likely EEH
frozen event.

Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Acked-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>