[CPUFREQ] powernow-k8: Limit Pstate transition latency check

[sfrench/cifs-2.6.git] / arch / x86 / kernel / cpu / cpufreq / powernow-k8.c

diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
index 7ec2123838e6f70f5af02e6e5804143bcc29090c..3e90cce3dc8bfe50fa245e8febe2aaf2625df25e 100644 (file)
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
@@ -1023,13 +1023,12 @@ static int get_transition_latency(struct powernow_k8_data *data)
        }
        if (max_latency == 0) {
                /*
        }
        if (max_latency == 0) {
                /*

-                * Fam 11h always returns 0 as transition latency.
-                * This is intended and means "very fast". While cpufreq core
-                * and governors currently can handle that gracefully, better
-                * set it to 1 to avoid problems in the future.
-                * For all others it's a BIOS bug.
+                * Fam 11h and later may return 0 as transition latency. This
+                * is intended and means "very fast". While cpufreq core and
+                * governors currently can handle that gracefully, better set it
+                * to 1 to avoid problems in the future.

                 */
                 */

-               if (boot_cpu_data.x86 != 0x11)
+               if (boot_cpu_data.x86 < 0x11)

                        printk(KERN_ERR FW_WARN PFX "Invalid zero transition "
                                "latency\n");
                max_latency = 1;
                        printk(KERN_ERR FW_WARN PFX "Invalid zero transition "
                                "latency\n");
                max_latency = 1;