[PATCH WIP/RFC v3 2/6] iw_cxgb4: block module unload until all ep resources are released

[Christoph Hellwig]

On Mon, Aug 29, 2016 at 02:26:48PM -0700, Steve Wise wrote:
> Otherwise an endpoint can be still closing down causing a touch
> after free crash.

This also adds a few WARN_ON calls that might be worth mentioning in the
changelog.

Otherwise looks fine:

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