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authorRoland Dreier <rolandd@cisco.com>2005-10-28 17:35:34 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2005-11-10 16:09:14 -0800
commit24a4e377068d15424cd6a921d41352f295548037 (patch)
treef6eb0e19f3828ca713d8151a63292de6d2287a90 /include
parent6d23c8bc7a6af4300b3c5244f4c21211f9adb960 (diff)
[PATCH] PCI: add pci_find_next_capability()
Some devices have more than one capability of the same type. For example, the PCI header for the PathScale InfiniPath looks like: 04:01.0 InfiniBand: Unknown device 1fc1:000d (rev 02) Subsystem: Unknown device 1fc1:000d Flags: bus master, fast devsel, latency 0, IRQ 193 Memory at fea00000 (64-bit, non-prefetchable) [size=2M] Capabilities: [c0] HyperTransport: Slave or Primary Interface Capabilities: [f8] HyperTransport: Interrupt Discovery and Configuration There are _two_ HyperTransport capabilities, and the PathScale driver wants to look at both of them. The current pci_find_capability() API doesn't work for this, since it only allows us to get to the first capability of a given type. The patch below introduces a new pci_find_next_capability(), which can be used in a loop like for (pos = pci_find_capability(pdev, <ID>); pos; pos = pci_find_next_capability(pdev, pos, <ID>)) { /* ... */ } Signed-off-by: Roland Dreier <rolandd@cisco.com> Signed-off-by: Matthew Wilcox <matthew@wil.cx> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include')
-rw-r--r--include/linux/pci.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 3596ac94ecf..7063241e34d 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -338,6 +338,7 @@ struct pci_dev *pci_find_device (unsigned int vendor, unsigned int device, const
struct pci_dev *pci_find_device_reverse (unsigned int vendor, unsigned int device, const struct pci_dev *from);
struct pci_dev *pci_find_slot (unsigned int bus, unsigned int devfn);
int pci_find_capability (struct pci_dev *dev, int cap);
+int pci_find_next_capability (struct pci_dev *dev, u8 pos, int cap);
int pci_find_ext_capability (struct pci_dev *dev, int cap);
struct pci_bus * pci_find_next_bus(const struct pci_bus *from);
@@ -550,6 +551,7 @@ static inline int pci_assign_resource(struct pci_dev *dev, int i) { return -EBUS
static inline int pci_register_driver(struct pci_driver *drv) { return 0;}
static inline void pci_unregister_driver(struct pci_driver *drv) { }
static inline int pci_find_capability (struct pci_dev *dev, int cap) {return 0; }
+static inline int pci_find_next_capability (struct pci_dev *dev, u8 post, int cap) { return 0; }
static inline int pci_find_ext_capability (struct pci_dev *dev, int cap) {return 0; }
static inline const struct pci_device_id *pci_match_device(const struct pci_device_id *ids, const struct pci_dev *dev) { return NULL; }