From: Konrad Rzeszutek Wilk Date: Thu, 16 Jun 2011 19:36:40 +0000 (-0400) Subject: [CPUFREQ] powernow-k8: Don't try to transition if the pstate is incorrect X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=fbb5b89eabea5ae7d621b7861863159560d8faa4;p=linux-beck.git [CPUFREQ] powernow-k8: Don't try to transition if the pstate is incorrect This patch augments the pstate transition code to error out (instead of returning 0) when an incorrect pstate is provided. Suggested-by: Borislav Petkov CC: andre.przywara@amd.com CC: Mark.Langsdorf@amd.com Signed-off-by: Konrad Rzeszutek Wilk Signed-off-by: Dave Jones --- diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c index 287c56f6749a..bce576d7478e 100644 --- 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);