[PATCH v3 9/9] nvme-rdma: fix reset hang if controller died in the middle of a reset

[Christoph Hellwig]

On Wed, Aug 19, 2020 at 10:36:51PM -0700, Sagi Grimberg wrote:
> If the controller becomes unresponsive in the middle of a reset, we
> will hang because we are waiting for the freeze to complete, but that
> cannot happen since we have commands that are inflight holding the
> q_usage_counter, and we can't blindly fail requests that times out.
> 
> So give a timeout and if we cannot wait for queue freeze before
> unfreezing, fail and have the error handling take care how to
> proceed (either schedule a reconnect of remove the controller).
> 
> Signed-off-by: Sagi Grimberg <sagi at grimberg.me>

Looks good,

Reviewed-by: Christoph Hellwig <hch at lst.de>