[PATCH V3 4/9] cpufreq: exynos: Use 'index' only to index into policy->freq_table
From: viresh.kumar@linaro.org (Viresh Kumar)
Date: 2016-06-03 13:37:25
Also in:
linux-pm, linux-samsung-soc, lkml
Subsystem:
cpu frequency scaling framework, the rest · Maintainers:
"Rafael J. Wysocki", Viresh Kumar, Linus Torvalds
Later patches would make changes in cpufreq core, after which policy->freq_table may be reordered by cpufreq core and it wouldn't be safe anymore to use 'index' for any other local arrays. To prepare for that, use policy->freq_table[index].driver_data for other driver specific usage of 'index'. The 'driver_data' fields are already set properly by the driver. Cc: Kukjin Kim <kgene@kernel.org> Cc: Krzysztof Kozlowski <redacted> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> --- drivers/cpufreq/exynos5440-cpufreq.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/cpufreq/exynos5440-cpufreq.c b/drivers/cpufreq/exynos5440-cpufreq.c
index 085f07d31ef0..6138cbb7594e 100644
--- a/drivers/cpufreq/exynos5440-cpufreq.c
+++ b/drivers/cpufreq/exynos5440-cpufreq.c@@ -210,7 +210,7 @@ static void exynos_enable_dvfs(unsigned int cur_frequency) static int exynos_target(struct cpufreq_policy *policy, unsigned int index) { - unsigned int tmp; + unsigned int tmp, rindex; int i; mutex_lock(&cpufreq_lock);
@@ -218,13 +218,19 @@ static int exynos_target(struct cpufreq_policy *policy, unsigned int index) freqs.old = policy->cur; freqs.new = policy->freq_table[index].frequency; + /* + * policy->freq_table may be sorted differently, get the index value we + * are concerned about. + */ + rindex = policy->freq_table[index].driver_data; + cpufreq_freq_transition_begin(policy, &freqs); /* Set the target frequency in all C0_3_PSTATE register */ for_each_cpu(i, policy->cpus) { tmp = __raw_readl(dvfs_info->base + XMU_C0_3_PSTATE + i * 4); tmp &= ~(P_VALUE_MASK << C0_3_PSTATE_NEW_SHIFT); - tmp |= (index << C0_3_PSTATE_NEW_SHIFT); + tmp |= (rindex << C0_3_PSTATE_NEW_SHIFT); __raw_writel(tmp, dvfs_info->base + XMU_C0_3_PSTATE + i * 4); }
--
2.7.1.410.g6faf27b