Another blkback issue related to flush

[Justin T. Gibbs]

On Sep 4, 2013, at 11:07 AM, Roger Pau Monné <roger.pau at citrix.com> wrote:

> Hello,
> 
> I've found another issue with blkback handling of flush operations, it
> was incorrectly setting one of the bio parameters when using a block
> device as backend. The attached patch fixes it, and also includes a
> small fix to correctly set the operation when writing the response on
> the ring (all responses written by FreeBSD blkback were of type
> BLKIF_OP_READ, because nreq->operation was not set).

It seems that the req's pendcnt is unused and can be culled.  Otherwise,
looks good to me.  Here's the patch I have in my tree now.

--
Justin

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