[BUG FIX PATCH COMPILE TESTED ONLY] nvme-fc: release admin tagset if init fails

[Keith Busch]

On Fri, Dec 19, 2025 at 04:18:42PM -0800, Chaitanya Kulkarni wrote:
> nvme_fabrics creates an NVMe/FC controller in following path:
> 
>     nvmf_dev_write()
>       -> nvmf_create_ctrl()
>         -> nvme_fc_create_ctrl()
>           -> nvme_fc_init_ctrl()
> 
> nvme_fc_init_ctrl() allocates the admin blk-mq resources right after
> nvme_add_ctrl() succeeds.  If any of the subsequent steps fail (changing
> the controller state, scheduling connect work, etc.), we jump to the
> fail_ctrl path, which tears down the controller references but never
> frees the admin queue/tag set.  The leaked blk-mq allocations match the
> kmemleak report seen during blktests nvme/fc.
> 
> Check ctrl->ctrl.admin_tagset in the fail_ctrl path and call
> nvme_remove_admin_tag_set() when it is set so that all admin queue
> allocations are reclaimed whenever controller setup aborts.

Thanks, applied.