Messages in this thread | | | Date | Wed, 6 Dec 2006 13:57:15 +0000 | From | Alan <> | Subject | Re: [PATCH] PCI legacy resource fix |
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On Wed, 6 Dec 2006 13:41:43 +0000 Ralf Baechle <ralf@linux-mips.org> wrote:
> Since commit 368c73d4f689dae0807d0a2aa74c61fd2b9b075f the kernel will try > to update the non-writeable BAR registers 0..3 of PIIX4 IDE adapters if > pci_assign_unassigned_resources() is used to do full resource assignment > of the bus. This fails because in the PIIX4 these BAR registers have > implicitly assumed values and read back as zero; it used to work because > the kernel used to just write zero to that register the read back value > did match what was written. > > The fix is a new resource flag IORESOURCE_PCI_FIXED used to mark a > resource as non-movable. This will also be useful to keep other import > system resources from being moved around - for example system consoles > on PCI busses. > > Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Alan Cox <alan@redhat.com> - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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