5297 mptsas refhash replacement on reset can cause hang
Reviewed by: Igor Kozhukhov <ikozhukhov@gmail.com>
Reviewed by: Yuri Pankov <yuri.pankov@nexenta.com>
Reviewed by: Andy Giles <illumos@ang.homedns.org>
Approved by: Richard Lowe <richlowe@richlowe.net>