Re: [PATCH] aoe: end barrier bios with EOPNOTSUPP

[Alan Cox]

> The bio in question is a barrier.  Jens Axboe suggested that such bios
> need to be recognized and ended with -EOPNOTSUPP by any driver that
> provides its own ->make_request_fn handler and does not handle
> barriers.
> 
> In testing the changes below eliminate the BUG.

Presumably AoE should actually issue an ATA cache flush for this case ?

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