x86: fix resume (S2R) broken by Intel microcode module, on A110L

[linux-2.6-omap-h63xx.git] / arch / x86 / kernel / microcode_core.c

diff --git a/arch/x86/kernel/microcode_core.c b/arch/x86/kernel/microcode_core.c
index 82fb2809ce32208eacd7231c38597938031d4036..c4b5b24e0217c585cbb8d0f8011a8b6c87229a6f 100644 (file)
--- a/arch/x86/kernel/microcode_core.c
+++ b/arch/x86/kernel/microcode_core.c
@@ -272,13 +272,18 @@ static struct attribute_group mc_attr_group = {
        .name = "microcode",
 };
 
-static void microcode_fini_cpu(int cpu)
+static void __microcode_fini_cpu(int cpu)
 {
        struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
 
-       mutex_lock(&microcode_mutex);
        microcode_ops->microcode_fini_cpu(cpu);
        uci->valid = 0;
+}
+
+static void microcode_fini_cpu(int cpu)
+{
+       mutex_lock(&microcode_mutex);
+       __microcode_fini_cpu(cpu);
        mutex_unlock(&microcode_mutex);
 }
 
@@ -306,12 +311,16 @@ static int microcode_resume_cpu(int cpu)
         * to this cpu (a bit of paranoia):
         */
        if (microcode_ops->collect_cpu_info(cpu, &nsig)) {
-               microcode_fini_cpu(cpu);
+               __microcode_fini_cpu(cpu);
+               printk(KERN_ERR "failed to collect_cpu_info for resuming cpu #%d\n",
+                               cpu);
                return -1;
        }
 
-       if (memcmp(&nsig, &uci->cpu_sig, sizeof(nsig))) {
-               microcode_fini_cpu(cpu);
+       if ((nsig.sig != uci->cpu_sig.sig) || (nsig.pf != uci->cpu_sig.pf)) {
+               __microcode_fini_cpu(cpu);
+               printk(KERN_ERR "cached ucode doesn't match the resuming cpu #%d\n",
+                               cpu);
                /* Should we look for a new ucode here? */
                return 1;
        }