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author | Ralf Baechle <ralf@linux-mips.org> | 2006-12-19 21:12:08 (GMT) |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-12-20 18:54:43 (GMT) |
commit | fb0f2b40faff41f03acaa2ee6e6231fc96ca497c (patch) | |
tree | 10f2f69cb43d6440313bb3efdc53ca69334830c0 /drivers/pci/quirks.c | |
parent | 7e7a43c32a8970ea2bfc3d1af353dcb1a9237769 (diff) | |
download | linux-fsl-qoriq-fb0f2b40faff41f03acaa2ee6e6231fc96ca497c.tar.xz |
PCI legacy resource fix
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.
[akpm@osdl.org: cleanup]
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/pci/quirks.c')
0 files changed, 0 insertions, 0 deletions