[PATCH] NVMe: Fix obtaining command result

[Christoph Hellwig]

On Fri, May 22, 2015 at 12:28:31PM -0600, Keith Busch wrote:
> Replaces req->sense_len usage, which is not owned by the LLD, to
> req->special to contain the command result for driver created commands,
> and sets the result unconditionally on completion.

Thanks Keith,

sorry for the mess, after porting this from my series to use replace
the BLOCK_PC specific fields to mainline I only tested this on Qemu
which only has a single queue.  I'll make sure to always do final
testing on real hardware as well.