Subject: ACPI :Restore the previous calculation of FSB ratio for mode <2
>From : Zhao Yakui <yakui.zhao@xxxxxxxxx>
The ratio is undefined in the register of MSR_FBC_REGSITER_ID
when the model for P4 is less than 2. So the following calculation in
comment (3e4159ab35c88aef5e063ba78796b277b762a30a) is inappropriate.
if (c->x86_model < 2)
mult = msr_lo >> 27;
It is more appropriate that the commit is reverted
until the proper patch in that place has been developed.
http://bugzilla.kernel.org/show_bug.cgi?id=7186
Signed-off-by: Zhao Yakui <yakui.zhao@xxxxxxxxx>
---
arch/x86/kernel/cpu/cpufreq/speedstep-lib.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
Index: linux-2.6.24-rc1/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
===================================================================
--- linux-2.6.24-rc1.orig/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
+++ linux-2.6.24-rc1/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
@@ -189,10 +189,7 @@ static unsigned int pentium4_get_frequen
printk(KERN_DEBUG "speedstep-lib: couldn't detect FSB speed. Please send an e-mail to <linux@xxxxxxxx>\n");
/* Multiplier. */
- if (c->x86_model < 2)
- mult = msr_lo >> 27;
- else
- mult = msr_lo >> 24;
+ mult = msr_lo >> 24;
dprintk("P4 - FSB %u kHz; Multiplier %u; Speed %u kHz\n", fsb, mult, (fsb * mult));
-
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