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authorHans Rosenfeld <hans.rosenfeld@amd.com>2010-08-18 18:19:50 +0400
committerH. Peter Anvin <hpa@zytor.com>2010-08-18 20:16:28 +0400
commit07a7795ca2e6e66d00b184efb46bd0e23d90d3fe (patch)
tree79dcc946b66f44498c1c4021420bf74971d74e37 /arch
parentda5cabf80e2433131bf0ed8993abc0f7ea618c73 (diff)
downloadlinux-07a7795ca2e6e66d00b184efb46bd0e23d90d3fe.tar.xz
x86, cpu: Fix regression in AMD errata checking code
A bug in the family-model-stepping matching code caused the presence of errata to go undetected when OSVW was not used. This causes hangs on some K8 systems because the E400 workaround is not enabled. Signed-off-by: Hans Rosenfeld <hans.rosenfeld@amd.com> LKML-Reference: <1282141190-930137-1-git-send-email-hans.rosenfeld@amd.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/cpu/amd.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 60a57b13082d..ba5f62f45f01 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -669,7 +669,7 @@ bool cpu_has_amd_erratum(const int *erratum)
}
/* OSVW unavailable or ID unknown, match family-model-stepping range */
- ms = (cpu->x86_model << 8) | cpu->x86_mask;
+ ms = (cpu->x86_model << 4) | cpu->x86_mask;
while ((range = *erratum++))
if ((cpu->x86 == AMD_MODEL_RANGE_FAMILY(range)) &&
(ms >= AMD_MODEL_RANGE_START(range)) &&