Mark Johnston 0d02f6c201 Simplify synchronization read error handling.
Since synchronization reads are performed by submitting a request to
the external mirror provider, we know that the request returns with an
error only when gmirror was unable to read a copy of the block from any
mirror. Thus, there is no need to retry the request from the
synchronization error handler.

Tested by:	pho
MFC after:	2 weeks
Sponsored by:	Dell EMC Isilon
2018-02-06 16:02:33 +00:00
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