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PCI/VPD: Add helper pci_get_func0_dev() 

Factor out the "get function 0" logic into pci_get_func0_dev().

[bhelgaas: keep PCI_DEVFN(PCI_SLOT()) instead of exposing implementation
details, commit log]
Link: https://lore.kernel.org/r/75d1f619-8a35-690d-8fc8-e851264a4bbb@gmail.com
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Heiner Kallweit 2021-04-16 21:52:07 +02:00 committed by Bjorn Helgaas
parent 0a08bc0761
commit 5881b38912
1 changed files with 8 additions and 5 deletions
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13
drivers/pci/vpd.c
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@ -29,6 +29,11 @@ struct pci_vpd {
unsigned int valid:1;
};
static struct pci_dev *pci_get_func0_dev(struct pci_dev *dev)
{
return pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
}
/**
* pci_read_vpd - Read one entry from Vital Product Data
* @dev: pci device struct
@ -295,8 +300,7 @@ static const struct pci_vpd_ops pci_vpd_ops = {
static ssize_t pci_vpd_f0_read(struct pci_dev *dev, loff_t pos, size_t count,
void *arg)
{
struct pci_dev *tdev = pci_get_slot(dev->bus,
PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
struct pci_dev *tdev = pci_get_func0_dev(dev);
ssize_t ret;
if (!tdev)
@ -310,8 +314,7 @@ static ssize_t pci_vpd_f0_read(struct pci_dev *dev, loff_t pos, size_t count,
static ssize_t pci_vpd_f0_write(struct pci_dev *dev, loff_t pos, size_t count,
const void *arg)
{
struct pci_dev *tdev = pci_get_slot(dev->bus,
PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
struct pci_dev *tdev = pci_get_func0_dev(dev);
ssize_t ret;
if (!tdev)
@ -457,7 +460,7 @@ static void quirk_f0_vpd_link(struct pci_dev *dev)
if (!PCI_FUNC(dev->devfn))
return;
f0 = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
f0 = pci_get_func0_dev(dev);
if (!f0)
return;