From: Jan Beulich <jbeulich@suse.com>
Date: Mon, 3 Oct 2011 15:35:47 +0000 (+0100)
Subject: x86: ucode-amd: Don't warn when no ucode is available for a CPU
X-Git-Tag: 4.0.3-rc3~2
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=a9b27ce67ea280375b457c9f759e4cce7ed67aa2;p=xen.git

x86: ucode-amd: Don't warn when no ucode is available for a CPU
revision

This patch originally comes from the Linus mainline kernel (2.6.33),
find below the patch details:

From: Andreas Herrmann <herrmann.der.user@googlemail.com>

There is no point in warning when there is no ucode available
for a specific CPU revision. Currently the container-file, which
provides the AMD ucode patches for OS load, contains only a few
ucode patches.

It's already clearly indicated by the printed patch_level
whenever new ucode was available and an update happened. So the
warning message is of no help but rather annoying on systems
with many CPUs.

Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
xen-unstable changeset:   23871:503ee256fecf
xen-unstable date:        Thu Sep 22 18:35:30 2011 +0100
---

diff --git a/xen/arch/x86/microcode_amd.c b/xen/arch/x86/microcode_amd.c
index 7cec273820..9dacb32877 100644
--- a/xen/arch/x86/microcode_amd.c
+++ b/xen/arch/x86/microcode_amd.c
@@ -97,11 +97,7 @@ static int microcode_fits(void *mc, int cpu)
     }
 
     if ( !equiv_cpu_id )
-    {
-        printk(KERN_ERR "microcode: CPU%d cpu_id "
-               "not found in equivalent cpu table\n", cpu);
-        return -EINVAL;
-    }
+	    return 0;
 
     if ( (mc_header->processor_rev_id) != equiv_cpu_id )
     {