Re: [PATCH v6 04/10] PCI: Make devres region requests consistent

Bjorn Helgaas
2024-04-24T20:12:38Z

On Mon, Apr 08, 2024 at 10:44:16AM +0200, Philipp Stanner wrote:
> Now that pure managed region request functions are available, the
> implementation of the hybrid-functions which are only sometimes managed
> can be made more consistent and readable by wrapping those
> always-managed functions.
>
> Implement a new pcim_ function for exclusively requested regions.
> Have the pci_request / release functions call their pcim_ counterparts.
> Remove the now surplus region_mask from struct pci_devres.

This looks like two patches; could they be separated?

- Convert __pci_request_region() etc to the new pcim model

- Add pcim_request_region_exclusive()

IORESOURCE_EXCLUSIVE was added by e8de1481fd71 ("resource: allow MMIO
exclusivity for device drivers") in 2008 to help debug an e1000e
problem. In the 16 years since, there's only been one new PCI-related
use (ne_pci_probe()), and we don't add a user of
pcim_request_region_exclusive() in this series, so I would defer it
until somebody wants it.

Bjorn