If log verbose in not turned on, its hard to tell when certain error
paths get hit. Add stats counters and corresponding logic to
debugfs/sysfs to aid understanding what paths were traversed.
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <james.smart@broadcom.com>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>