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[MIPS] IP27: Switch to dynamic interrupt routing avoding panic on error. 

pcibios_map_irq is no way of returning an error but on IP27 an interrupt
is possibly not routable when running out of resources.  So do the
interrupt routing at pcibios_enable_device time.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
wifi-calibration
Ralf Baechle 2008-09-27 15:05:06 +01:00
parent 19506fc518
commit f4d15f1c87
1 changed files with 33 additions and 11 deletions
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44
arch/mips/pci/pci-ip27.c
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@ -143,25 +143,47 @@ int __cpuinit bridge_probe(nasid_t nasid, int widget_id, int masterwid)
*/
int __devinit pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
struct bridge_controller *bc = BRIDGE_CONTROLLER(dev->bus);
int irq = bc->pci_int[slot];
return 0;
}
if (irq == -1) {
irq = bc->pci_int[slot] = request_bridge_irq(bc);
if (irq < 0)
panic("Can't allocate interrupt for PCI device %s\n",
pci_name(dev));
/* Most MIPS systems have straight-forward swizzling needs. */
static inline u8 bridge_swizzle(u8 pin, u8 slot)
{
return (((pin - 1) + slot) % 4) + 1;
}
static inline struct pci_dev *bridge_root_dev(struct pci_dev *dev)
{
while (dev->bus->parent) {
/* Move up the chain of bridges. */
dev = dev->bus->self;
}
irq_to_bridge[irq] = bc;
irq_to_slot[irq] = slot;
return irq;
return dev;
}
/* Do platform specific device initialization at pci_enable_device() time */
int pcibios_plat_dev_init(struct pci_dev *dev)
{
struct bridge_controller *bc = BRIDGE_CONTROLLER(dev->bus);
struct pci_dev *rdev = bridge_root_dev(dev);
int slot = PCI_SLOT(rdev->devfn);
int irq;
irq = bc->pci_int[slot];
if (irq == -1) {
irq = request_bridge_irq(bc);
if (irq < 0)
return irq;
bc->pci_int[slot] = irq;
}
irq_to_bridge[irq] = bc;
irq_to_slot[irq] = slot;
dev->irq = irq;
return 0;
}