[CPUFREQ] Work around some broken userspace daemons.

Some daemons try to set the speed to the same speed we're currently
running at. Detect that, and bail out early before we fiddle
with registers and such.

Signed-off-by: Dave Jones <davej@redhat.com>

diff --git a/arch/i386/kernel/cpu/cpufreq/longhaul.c b/arch/i386/kernel/cpu/cpufreq/longhaul.c
index 4a4bab4f7100753774d49516f634a583eee5e8f2..62dde5592a1f84d7c77c13f6f3dcf41a24fb61a1 100644 (file)
--- a/arch/i386/kernel/cpu/cpufreq/longhaul.c
+++ b/arch/i386/kernel/cpu/cpufreq/longhaul.c
@@ -163,7 +163,7 @@ static void do_powersaver(union msr_longhaul *longhaul,
  * longhaul_set_cpu_frequency()
  * @clock_ratio_index : bitpattern of the new multiplier.
  *
- * Sets a new clock ratio, and -if applicable- a new Front Side Bus
+ * Sets a new clock ratio.
  */
 
 static void longhaul_setstate(unsigned int clock_ratio_index)
@@ -172,6 +172,11 @@ static void longhaul_setstate(unsigned int clock_ratio_index)
        struct cpufreq_freqs freqs;
        union msr_longhaul longhaul;
        union msr_bcr2 bcr2;
+       static unsigned int old_ratio=-1;
+
+       if (old_ratio == clock_ratio_index)
+               return;
+       oldratio = clock_ratio_index;
 
        mult = clock_ratio[clock_ratio_index];
        if (mult == -1)
@@ -562,7 +567,7 @@ static int __init longhaul_cpu_init(struct cpufreq_policy *policy)
                break;
        }
 
-       printk (KERN_INFO PFX "VIA %s CPU detected.", cpuname);
+       printk (KERN_INFO PFX "VIA %s CPU detected.  ", cpuname);
        switch (longhaul_version) {
        case TYPE_LONGHAUL_V1:
        case TYPE_LONGHAUL_V2: