[CPUFREQ] Crusoe: longrun cpufreq module reports false min freq

The longrun cpufreq module reports a false minimum frequency 3MHz on
300-600MHz Crusoe processor.  This may be due to a calculation bug
in the module.

Original patch from Kaz Sasayama <kazssym@hypercore.co.jp>
submitted as http://bugs.debian.org/468149 patch ported to x86

Cc: Kaz Sasayama <kazssym@hypercore.co.jp>
Signed-off-by: Nmaximilian attems <max@stro.at>
Signed-off-by: NDave Jones <davej@redhat.com>

arch/x86/kernel/cpu/cpufreq/longrun.c

@@ -245,7 +245,7 @@ static unsigned int __init longrun_determine_freqs(unsigned int *low_freq,
 	if ((ecx > 95) || (ecx == 0) || (eax < ebx))
 		return -EIO;
 
-	edx = (eax - ebx) / (100 - ecx);
+	edx = ((eax - ebx) * 100) / (100 - ecx);
 	*low_freq = edx * 1000; /* back to kHz */
 
 	dprintk("low frequency is %u kHz\n", *low_freq);