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-rw-r--r--drivers/pci/pci.c28
1 files changed, 19 insertions, 9 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 5a14b73cf3a..4627a51d1d6 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -96,10 +96,10 @@ int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap)
}
EXPORT_SYMBOL_GPL(pci_find_next_capability);
-static int __pci_bus_find_cap(struct pci_bus *bus, unsigned int devfn, u8 hdr_type, int cap)
+static int __pci_bus_find_cap_start(struct pci_bus *bus,
+ unsigned int devfn, u8 hdr_type)
{
u16 status;
- u8 pos;
pci_bus_read_config_word(bus, devfn, PCI_STATUS, &status);
if (!(status & PCI_STATUS_CAP_LIST))
@@ -108,15 +108,14 @@ static int __pci_bus_find_cap(struct pci_bus *bus, unsigned int devfn, u8 hdr_ty
switch (hdr_type) {
case PCI_HEADER_TYPE_NORMAL:
case PCI_HEADER_TYPE_BRIDGE:
- pos = PCI_CAPABILITY_LIST;
- break;
+ return PCI_CAPABILITY_LIST;
case PCI_HEADER_TYPE_CARDBUS:
- pos = PCI_CB_CAPABILITY_LIST;
- break;
+ return PCI_CB_CAPABILITY_LIST;
default:
return 0;
}
- return __pci_find_next_cap(bus, devfn, pos, cap);
+
+ return 0;
}
/**
@@ -140,7 +139,13 @@ static int __pci_bus_find_cap(struct pci_bus *bus, unsigned int devfn, u8 hdr_ty
*/
int pci_find_capability(struct pci_dev *dev, int cap)
{
- return __pci_bus_find_cap(dev->bus, dev->devfn, dev->hdr_type, cap);
+ int pos;
+
+ pos = __pci_bus_find_cap_start(dev->bus, dev->devfn, dev->hdr_type);
+ if (pos)
+ pos = __pci_find_next_cap(dev->bus, dev->devfn, pos, cap);
+
+ return pos;
}
/**
@@ -158,11 +163,16 @@ int pci_find_capability(struct pci_dev *dev, int cap)
*/
int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap)
{
+ int pos;
u8 hdr_type;
pci_bus_read_config_byte(bus, devfn, PCI_HEADER_TYPE, &hdr_type);
- return __pci_bus_find_cap(bus, devfn, hdr_type & 0x7f, cap);
+ pos = __pci_bus_find_cap_start(bus, devfn, hdr_type & 0x7f);
+ if (pos)
+ pos = __pci_find_next_cap(bus, devfn, pos, cap);
+
+ return pos;
}
/**