Re: [Qemu-devel] [RFC PATCH v2 1/4] pci: refactor pci_find_capapibilty to get bdf as the first argument instead of the whole pci_device

[Kevin O'Connor <kevin@koconnor.net>]

On Sun, Jul 23, 2017 at 01:11:47AM +0300, Aleksandr Bezzubikov wrote:
> Refactor pci_find_capability function to get bdf instead of
> a whole pci_device* as the only necessary field for this function 
> is still bdf.
> It greatly helps when we have bdf but not pci_device.
> 
> Signed-off-by: Aleksandr Bezzubikov <zuban32s@gmail.com>
> ---
>  src/fw/pciinit.c    |  4 ++--
>  src/hw/pcidevice.c  | 12 ++++++------
>  src/hw/pcidevice.h  |  2 +-
>  src/hw/virtio-pci.c |  4 ++--
>  4 files changed, 11 insertions(+), 11 deletions(-)
> 
> diff --git a/src/fw/pciinit.c b/src/fw/pciinit.c
> index 08221e6..864954f 100644
> --- a/src/fw/pciinit.c
> +++ b/src/fw/pciinit.c
> @@ -762,7 +762,7 @@ static int pci_bus_hotplug_support(struct pci_bus *bus, u8 pcie_cap)
>          return downstream_port && slot_implemented;
>      }
>  
> -    shpc_cap = pci_find_capability(bus->bus_dev, PCI_CAP_ID_SHPC, 0);
> +    shpc_cap = pci_find_capability(bus->bus_dev->bdf, PCI_CAP_ID_SHPC, 0);
>      return !!shpc_cap;
>  }
>  
> @@ -844,7 +844,7 @@ static int pci_bios_check_devices(struct pci_bus *busses)
>               */
>              parent = &busses[0];
>          int type;
> -        u8 pcie_cap = pci_find_capability(s->bus_dev, PCI_CAP_ID_EXP, 0);
> +        u8 pcie_cap = pci_find_capability(s->bus_dev->bdf, PCI_CAP_ID_EXP, 0);
>          int hotplug_support = pci_bus_hotplug_support(s, pcie_cap);
>          for (type = 0; type < PCI_REGION_TYPE_COUNT; type++) {
>              u64 align = (type == PCI_REGION_TYPE_IO) ?
> diff --git a/src/hw/pcidevice.c b/src/hw/pcidevice.c
> index cfebf66..d01e27b 100644
> --- a/src/hw/pcidevice.c
> +++ b/src/hw/pcidevice.c
> @@ -134,25 +134,25 @@ pci_find_init_device(const struct pci_device_id *ids, void *arg)
>      return NULL;
>  }
>  
> -u8 pci_find_capability(struct pci_device *pci, u8 cap_id, u8 cap)
> +u8 pci_find_capability(u16 bdf, u8 cap_id, u8 cap)

Thanks.  If you respin this series, please also move
pci_find_capability() function from pcidevice.c to pci.c.  (If the
function no longer takes a pci_device, it should be moved out of
pcidevice.c.)

-Kevin