[PATCH] x86: skip it if Fam 10h only handle bus 0
need to apply after
x86_64: check MSR to get MMCONFIG for AMD Family 10h Opteron v3
some BIOS only let AMD fam 10h handle bus0, and nvidia mcp55/ck804
to handle other buses. at that case MCFG will cover all over them.
this patch will skip it so to use MCFG later.
Signed-off-by: Yinghai Lu <[EMAIL PROTECTED]>
Index: linux-2.6/arch/x86/pci/mmconfig-shared.c
===
--- linux-2.6.orig/arch/x86/pci/mmconfig-shared.c
+++ linux-2.6/arch/x86/pci/mmconfig-shared.c
@@ -123,6 +123,14 @@ static const char __init *pci_mmcfg_amd_
busnbits = (msr >> FAM10H_MMIO_CONF_BUSRANGE_SHIFT) &
FAM10H_MMIO_CONF_BUSRANGE_MASK;
+
+ /*
+* only handle bus 0 ?
+* need to skip it
+*/
+ if (!busnbits)
+ return NULL;
+
if (busnbits > 8) {
segnbits = busnbits - 8;
busnbits = 8;
--
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[PATCH] x86: skip it if Fam 10h only handle bus 0
need to apply after
x86_64: check MSR to get MMCONFIG for AMD Family 10h Opteron v3
some BIOS only let AMD fam 10h handle bus0, and nvidia mcp55/ck804
to handle other buses. at that case MCFG will cover all over them.
this patch will skip it so to use MCFG later.
Signed-off-by: Yinghai Lu [EMAIL PROTECTED]
Index: linux-2.6/arch/x86/pci/mmconfig-shared.c
===
--- linux-2.6.orig/arch/x86/pci/mmconfig-shared.c
+++ linux-2.6/arch/x86/pci/mmconfig-shared.c
@@ -123,6 +123,14 @@ static const char __init *pci_mmcfg_amd_
busnbits = (msr FAM10H_MMIO_CONF_BUSRANGE_SHIFT)
FAM10H_MMIO_CONF_BUSRANGE_MASK;
+
+ /*
+* only handle bus 0 ?
+* need to skip it
+*/
+ if (!busnbits)
+ return NULL;
+
if (busnbits 8) {
segnbits = busnbits - 8;
busnbits = 8;
--
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
