From: Ravikiran G Thirumalai Date: Thu, 20 Mar 2008 07:39:02 +0000 (-0700) Subject: x86: vSMP: Fix is_vsmp_box() X-Git-Tag: v2.6.26-rc1~1154^2~312 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3250c91ada16a06de5afef55bce7b766c894d75c;p=linux-2.6 x86: vSMP: Fix is_vsmp_box() is_vsmp_box() currently does not work on vSMPowered systems, as pci cfg space is not read correctly -- This patch fixes it. Signed-off-by: Ravikiran Thirumalai Signed-off-by: Ingo Molnar --- diff --git a/arch/x86/kernel/vsmp_64.c b/arch/x86/kernel/vsmp_64.c index a00961d42e..eb25584c54 100644 --- a/arch/x86/kernel/vsmp_64.c +++ b/arch/x86/kernel/vsmp_64.c @@ -84,8 +84,10 @@ int is_vsmp_box(void) return vsmp; /* Check if we are running on a ScaleMP vSMP box */ - if (read_pci_config(0, 0x1f, 0, PCI_VENDOR_ID) == - (PCI_VENDOR_ID_SCALEMP || (PCI_DEVICE_ID_SCALEMP_VSMP_CTL << 16))) + if ((read_pci_config_16(0, 0x1f, 0, PCI_VENDOR_ID) == + PCI_VENDOR_ID_SCALEMP) && + (read_pci_config_16(0, 0x1f, 0, PCI_DEVICE_ID) == + PCI_DEVICE_ID_SCALEMP_VSMP_CTL)) vsmp = 1; return vsmp;