In commit 847584ba2ae3e6c6678610af998692e0ef6ab82d I introduced an off
by one error in the case where a VTBAR window intersects with the end
of the IOH's Local MMIOL range.
In example, if the Local MMIOL range is 0xb4000000 - 0xb4ffffff and
the VTBAR window is at 0xb4ffe000 - 0xb4ffffff then the Local MMIOL's
range needs to be truncated so as not to include the VTBAR registers.
The result of the Local MMIOL truncation should be 0xb4000000 -
0xb4ffdfff (0xb4ffe000 - 1). Due to the off by one error the Local
MMIOL resultant range is incorrectly 0xb4000000 - 0xb4ffe000.
I discovered this when replying to Yinghai Lu's feedback - Thanks Yinghai.
Signed-off-by: Myron Stowe <myron.stowe@xxxxxx>
---
arch/x86/pci/intel_bus.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/x86/pci/intel_bus.c b/arch/x86/pci/intel_bus.c
index 9d91b1e..8be4e1d 100644
--- a/arch/x86/pci/intel_bus.c
+++ b/arch/x86/pci/intel_bus.c
@@ -87,7 +87,7 @@ static void __devinit pci_root_bus_res(struct pci_dev *dev)
if (vtbar <= mmiol_base)
mmiol_base = vtbar + IOH_VTSIZE;
else if (mmiol_end <= vtbar + IOH_VTSIZE - 1)
- mmiol_end = vtbar;
+ mmiol_end = vtbar - 1;
else {
update_res(info, mmiol_base, vtbar - 1,
IORESOURCE_MEM, 0);
--
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