[PATCH 1/3] nvme: fixup kato deadlock

[Christoph Hellwig]

On Wed, Mar 03, 2021 at 03:23:12PM +0100, Hannes Reinecke wrote:
> Actually, having thought a bit more, I'm not sure if we should change
> that. Changing the number of reserved commands _will_ have an impact on
> error recovery, up to the point that we cannot issue a 'connect' command
> if a keep-alive command is still running.
> Which means we might be seeing spurious connection failures during
> recovery, something which I'd be very cautious about.

We always do a blk_mq_tagset_busy_iter that cancels all requests before
reconnecting.