Re: [PATCH v3] PCI/portdrv: Allow AER service only for Root Ports & RCECs

[Bjorn Helgaas]

On Mon, Dec 12, 2022 at 12:46:11AM -0800, Christoph Hellwig wrote:
> On Fri, Dec 09, 2022 at 06:29:22PM -0600, Bjorn Helgaas wrote:
> > +	if ((pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT ||
> > +             pci_pcie_type(dev) == PCI_EXP_TYPE_RC_EC) &&
> > +	    dev->aer_cap && pci_aer_available() &&
> >  	    (pcie_ports_native || host->native_aer))
> 
> Eww, this is really hard to follow.  Can you split this out into
> a little helper, that actually documents the decisions based
> on some of the wording you have in the current comit message?

I completely agree.  We have basically the same sort of thing for
PCIE_PORT_SERVICE_HP (also added this cycle), PCIE_PORT_SERVICE_AER,
PCIE_PORT_SERVICE_PME, and PCIE_PORT_SERVICE_DPC.  I'd really like to
figure out a way to centralize the check for pcie_ports_native,
host->native_aer, etc., because they clutter a lot of places.

I didn't have time to work on that this cycle, but maybe next time.

Bjorn