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PCI/cardbus: Add a fixup hook and fix powerpc

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The cardbus code creates PCI devices without ever going through the
necessary fixup bits and pieces that normal PCI devices go through.

There's in fact a commented out call to pcibios_fixup_bus() in there,
it's commented because ... it doesn't work.

I could make pcibios_fixup_bus() do the right thing on powerpc easily
but I felt it cleaner instead to provide a specific hook pci_fixup_cardbus
for which a weak empty implementation is provided by the PCI core.

This fixes cardbus on powerbooks and probably all other PowerPC
platforms which was broken completely for ever on some platforms and
since 2.6.31 on others such as PowerBooks when we made the DMA ops
mandatory (since those are setup by the fixups).

Acked-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Benjamin Herrenschmidt 2009-12-09 17:52:13 +11:00 • committed by Jesse Barnes
parent 7e8af37a9a
commit 2d1c861871
4 changed files with 22 additions and 1 deletions
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3
include/linux/pci.h
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@ -566,6 +566,9 @@ void pcibios_align_resource(void *, struct resource *, resource_size_t,
resource_size_t);
void pcibios_update_irq(struct pci_dev *, int irq);
/* Weak but can be overriden by arch */
void pci_fixup_cardbus(struct pci_bus *);
/* Generic PCI functions used internally */
extern struct pci_bus *pci_find_bus(int domain, int busnr);