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authorPaul Mackerras <paulus@samba.org>2005-08-18 14:33:01 +1000
committerGreg Kroah-Hartman <gregkh@suse.de>2005-09-08 15:04:30 -0700
commitcecf4864cf52a4a243a62b2856a6a155edbb55e8 (patch)
treeffbf170ed0208e81e9561dca3ad7786c362a7024 /include/linux
parent1d2450a4a6eb656798c6282b5ffc8e5f9f52ac14 (diff)
[PATCH] PCI: Add pci_walk_bus function to PCI core (nonrecursive)
The PCI error recovery infrastructure needs to be able to contact all the drivers affected by a PCI error event, which may mean traversing all the devices under a given PCI-PCI bridge. This patch adds a function to the PCI core that traverses all the PCI devices on a PCI bus and under any PCI-PCI bridges on that bus (and so on), calling a given function for each device. This provides a way for the error recovery code to iterate through all devices that are affected by an error event. This version is not implemented as a recursive function. Instead, when we reach a PCI-PCI bridge, we set the pointers to start doing the devices on the bus under the bridge, and when we reach the end of a bus's devices, we use the bus->self pointer to go back up to the next higher bus and continue doing its devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/pci.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 8878ccff9e3..b0e24471328 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -434,6 +434,9 @@ const struct pci_device_id *pci_match_device(struct pci_driver *drv, struct pci_
const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, struct pci_dev *dev);
int pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max, int pass);
+void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
+ void *userdata);
+
/* kmem_cache style wrapper around pci_alloc_consistent() */
#include <linux/dmapool.h>