[PATCH 4/5] block: BLK_STS_NEXUS is a path failure

[Christoph Hellwig]

On Fri, May 04, 2018 at 01:28:44PM +0200, Hannes Reinecke wrote:
> A block error of BLK_STS_NEXUS is equivalent to a path failure,
> so blk_path_error() should reflect this.

BLK_STS_NEXUS is the replacement of -EBADE, which in the old
world order was labelled 'critical nexus"' and is claim to be
used for reservation conflicts, in which case we should not rety
on another path.