scsi: fixe kernel panic on scsi_device's iorequest_cnt
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2203125
Signed-off-by: Ming Lei ming.lei@redhat.com
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2203125
Signed-off-by: Ming Lei ming.lei@redhat.com