When the driver reads state values from the hw it might happen that
different values are read in subsequent reads and this can cause problems,
this may lead to a timeout in this function and a non working adapter.

Cc: Adam Radford <aradford@gmail.com>
Signed-off-by: NTomas Henzl <thenzl@redhat.com>
Reviewed-by: NShintaro Minemoto <fj3207hq@aa.jp.fujitsu.com>
Acked-by: NSumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>