Continuing from discussion with Thierry (lkml.org/lkml/2013/1/18/107) perhaps
this will be useful to fold into your patchset.
---
This patch provides pci_bus_fixup_irqs which performs the same
function as pci_fixup_irqs but only to descendants of the specified
bus.
This can reduce unnecessary fixing up of device irqs when new buses
are added.
Signed-off-by: Andrew Murray <Andrew.Murray@xxxxxxx>
Signed-off-by: Liviu Dudau <Liviu.Dudau@xxxxxxx>
---
drivers/pci/setup-irq.c | 15 +++++++++++++++
include/linux/pci.h | 3 +++
2 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/drivers/pci/setup-irq.c b/drivers/pci/setup-irq.c
index eb219a1..ea91874 100644
--- a/drivers/pci/setup-irq.c
+++ b/drivers/pci/setup-irq.c
@@ -62,3 +62,18 @@ pci_fixup_irqs(u8 (*swizzle)(struct pci_dev *, u8 *),
for_each_pci_dev(dev)
pdev_fixup_irq(dev, swizzle, map_irq);
}
+
+void __init
+pci_bus_fixup_irqs(struct pci_bus *bus,
+ u8 (*swizzle)(struct pci_dev *, u8 *),
+ int (*map_irq)(const struct pci_dev *, u8, u8))
+{
+ struct pci_dev *dev;
+
+ list_for_each_entry(dev, &bus->devices, bus_list) {
+ pdev_fixup_irq(dev, swizzle, map_irq);
+
+ if (dev->subordinate)
+ pci_bus_fixup_irqs(dev->subordinate, swizzle, map_irq);
+ }
+}
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 5faa831..1b3c2eb 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -953,6 +953,9 @@ void pdev_enable_device(struct pci_dev *);
int pci_enable_resources(struct pci_dev *, int mask);
void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
int (*)(const struct pci_dev *, u8, u8));
+void pci_bus_fixup_irqs(struct pci_bus *bus,
+ u8 (*swizzle)(struct pci_dev *, u8 *),
+ int (*map_irq)(const struct pci_dev *, u8, u8));
#define HAVE_PCI_REQ_REGIONS 2
int __must_check pci_request_regions(struct pci_dev *, const char *);
int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
--
1.7.0.4
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