[PATCH 1/2] nvmet-rdma: avoid circular locking dependency on install_queue()

[Christoph Hellwig]

On Thu, Nov 02, 2023 at 03:19:02PM +0100, Hannes Reinecke wrote:
> nvmet_rdma_install_queue() is driven from the ->io_work workqueue
> function, but will call flush_workqueue() which might trigger
> ->release_work() which in itself calls flush_work on ->io_work.
> 
> To avoid that move the check for any pending queue disconnects
> to the 'install_queue()' callback. This replicates what the tcp
> code is already doing, and also allows us to return a
> 'controller busy' connect response until all disconnects
> are completed.

So what are hosts going to do when they see NVME_SC_CONNECT_CTRL_BUSY?

I see no special casing for it in our host side code.