when getting cpu frequency failures, it will retry 2 times at most. Signed-off-by: Pearson, Greg <greg.pear...@hpe.com> Signed-off-by: Zhang, Lin-Bao <linbao.zh...@hpe.com> --- drivers/cpufreq/pcc-cpufreq.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/drivers/cpufreq/pcc-cpufreq.c b/drivers/cpufreq/pcc-cpufreq.c index c8f1616..159dede 100644 --- a/drivers/cpufreq/pcc-cpufreq.c +++ b/drivers/cpufreq/pcc-cpufreq.c @@ -108,6 +108,7 @@ struct pcc_cpu { u32 input_offset; u32 output_offset; u64 prev_time; + u32 get_freq_retry; }; static u32 max_time_between_cmds = 0; @@ -225,6 +226,17 @@ static unsigned int pcc_get_freq(unsigned int cpu) curr_freq = real_pcc_get_freq(cpu); + spin_lock(&pcc_lock); + if (curr_freq == 0 && pcc_cpu_data->get_freq_retry < 2) { + pcc_cpu_data->get_freq_retry++; + spin_unlock(&pcc_lock); + curr_freq = pcc_get_freq(cpu); + return curr_freq; + } + + pcc_cpu_data->get_freq_retry = 0; + spin_unlock(&pcc_lock); + return curr_freq; } -- 1.8.5.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/