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| author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-06-16 15:36:40 -0400 |
|---|---|---|
| committer | Dave Jones <davej@redhat.com> | 2011-06-16 16:31:13 -0400 |
| commit | fbb5b89eabea5ae7d621b7861863159560d8faa4 (patch) | |
| tree | 51e3d877cb3457bcd801175fb455927fd52f2d2b /drivers/cpufreq | |
| parent | a9d3d2068064b7a6395871a49616d3784f802d50 (diff) | |
| download | linux-fbb5b89eabea5ae7d621b7861863159560d8faa4.tar.gz linux-fbb5b89eabea5ae7d621b7861863159560d8faa4.tar.bz2 linux-fbb5b89eabea5ae7d621b7861863159560d8faa4.zip | |
[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 <bp@alien8.de>
CC: andre.przywara@amd.com
CC: Mark.Langsdorf@amd.com
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/powernow-k8.c | 3 |
1 files changed, 2 insertions, 1 deletions
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); |