Hi,
On Thu, Mar 28, 2024 at 9:18 AM Bjorn Helgaas <helgaas@xxxxxxxxxx> wrote:
>
> On Wed, Mar 27, 2024 at 02:49:34PM -0700, Kuppuswamy Sathyanarayanan wrote:
> > On 3/27/24 11:02 AM, Bjorn Helgaas wrote:
> > > From: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
> > >
> > > f646c2a0a668 ("PCI: Return u8 from pci_find_capability() and similar") and
> > > ee8b1c478a9f ("PCI: Return u16 from pci_find_ext_capability() and similar")
> > > updated the return type of the extern declarations, but neglected to update
> > > the type of the stubs used CONFIG_PCI is not enabled.
> > >
> > > Update them to match the extern declarations.
> > >
> > > Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
> > > ---
> >
> > This change looks fine to me.
> >
> > Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>
>
> Thanks for reviewing it!
>
> > But the callers of these functions still seems to use int
> > declaration to store the output. Any reason for not changing them?
> > Like the usages in drivers/pci/pci.c?
>
> This patch is just to make the extern declarations match the stubs.
>
> No particular reason not to change users other than I didn't want to
> change the users before the declarations (to avoid warnings about
> assigning an int to a u8 or u16), and there's not a lot of value in
> changing local variables, where an int is just on the stack and works
> fine.
>
> Changing stored values in a struct would have more benefit. I took a
> quick look and found these possibilities:
>
Agree. Thanks for clarifying it.
> struct controller.cap_offset (drivers/pci/hotplug/shpchp.h SHPC cap)
> struct pci_sriov.pos (drivers/pci/pci.h SR-IOV ext cap)
> struct altera_pcie_data.cap_offset (drivers/pci/controller/pcie-altera.c PCIe cap)
>
> struct tg3.msi_cap (broadcom/tg3.h MSI cap)
> struct tg3.pcix_cap (broadcom/tg3.h PCI-X cap)
> struct bnx2.pm_cap (broadcom/bnx2.h PM cap)
> struct bnx2.pcix_cap (broadcom/bnx2.h PCI-X cap)
> struct bnx2x_sriov.cap (broadcom/bnx2x/bnx2x_sriov.h SR-IOV ext cap)
> struct amd8111e_priv.pm_cap (amd/amd8111e.c, removed [1])
> struct pci_params.pm_cap (qlogic/qed/qed.h, removed [2])
> struct qed_hw_sriov_info.cap (qlogic/qed/qed_sriov.h SR-IOV ext cap)
> struct eeh_dev.pcix_cap (powerpc/include/asm/eeh.h PCI-X cap)
> struct eeh_dev.pcie_cap (powerpc/include/asm/eeh.h PCIe cap)
> struct eeh_dev.aer_cap (powerpc/include/asm/eeh.h AER ext cap)
> struct eeh_dev.af_cap (powerpc/include/asm/eeh.h AF cap)
> struct icm.vnd_cap (drivers/thunderbolt/icm.c VNDR ext cap)
>
> [1] https://lore.kernel.org/all/20240325220633.1453180-1-helgaas@xxxxxxxxxx/
> [2] https://lore.kernel.org/all/20240325224931.1462051-1-helgaas@xxxxxxxxxx/
>
> Bjorn
