[CPUFREQ] powernow-k8: Don't try to transition if the pstate is incor…

…rect This patch augments the pstate transition code to error out (instead of returning 0) when an incorrect pstate is provided. Suggested-by: Borislav Petkov <[email protected]> CC: [email protected] CC: [email protected] Signed-off-by: Konrad Rzeszutek Wilk <[email protected]> Signed-off-by: Dave Jones <[email protected]>
yshchan · Jun 16, 2011 · fbb5b89 · fbb5b89
1 parent a9d3d20
commit fbb5b89
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c
@@ -1104,7 +1104,8 @@ static int transition_frequency_pstate(struct powernow_k8_data *data,
 	/* get MSR index for hardware pstate transition */
 	pstate = index & HW_PSTATE_MASK;
 	if (pstate > data->max_hw_pstate)
-		return 0;
+		return -EINVAL;
+
 	freqs.old = find_khz_freq_from_pstate(data->powernow_table,
 			data->currpstate);
 	freqs.new = find_khz_freq_from_pstate(data->powernow_table, pstate);