PCI: Add support for DMA alias quirks

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Some devices are broken and use a requester ID other than their physical
devfn.  Add a byte, using an existing gap in the pci_dev structure, to
store an alternate "alias" devfn.  A bit in the dev_flags tells us when
this is valid.  We then add the alias as one more step in the
pci_for_each_dma_alias() iterator.

Tested-by: George Spelvin <linux@horizon.com>
Tested-by: Pat Erley <pat-lkml@erley.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

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Alex Williamson 2014-05-22 17:07:43 -06:00 • committed by Bjorn Helgaas

parent 6b121592f8

commit 31c2b8153c

2 changed files with 14 additions and 0 deletions

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11

drivers/pci/search.c

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3

include/linux/pci.h

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