[PATCH V3 2/9] cpufreq: blackfin: Use 'index' only to index into policy->freq_table
From: Viresh Kumar <viresh.kumar@linaro.org>
Date: 2016-06-03 13:35:50
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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: Steven Miao <redacted> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> --- drivers/cpufreq/blackfin-cpufreq.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/drivers/cpufreq/blackfin-cpufreq.c b/drivers/cpufreq/blackfin-cpufreq.c
index 1650c213f465..101daa851c81 100644
--- a/drivers/cpufreq/blackfin-cpufreq.c
+++ b/drivers/cpufreq/blackfin-cpufreq.c@@ -135,6 +135,7 @@ static int bfin_target(struct cpufreq_policy *policy, unsigned int index) static unsigned long lpj_ref; static unsigned int lpj_ref_freq; unsigned int old_freq, new_freq; + int dpm_index; int ret = 0; #if defined(CONFIG_CYCLES_CLOCKSOURCE)
@@ -144,8 +145,14 @@ static int bfin_target(struct cpufreq_policy *policy, unsigned int index) old_freq = bfin_getfreq_khz(0); new_freq = policy->freq_table[index].frequency; + /* + * policy->freq_table may be sorted differently, get the index value we + * are concerned about. + */ + dpm_index = policy->freq_table[index].driver_data; + #ifndef CONFIG_BF60x - plldiv = (bfin_read_PLL_DIV() & SSEL) | dpm_state_table[index].csel; + plldiv = (bfin_read_PLL_DIV() & SSEL) | dpm_state_table[dpm_index].csel; bfin_write_PLL_DIV(plldiv); #else ret = cpu_set_cclk(policy->cpu, new_freq * 1000);
@@ -154,13 +161,13 @@ static int bfin_target(struct cpufreq_policy *policy, unsigned int index) return ret; } #endif - on_each_cpu(bfin_adjust_core_timer, &index, 1); + on_each_cpu(bfin_adjust_core_timer, &dpm_index, 1); #if defined(CONFIG_CYCLES_CLOCKSOURCE) cycles = get_cycles(); SSYNC(); cycles += 10; /* ~10 cycles we lose after get_cycles() */ - __bfin_cycles_off += (cycles << __bfin_cycles_mod) - (cycles << index); - __bfin_cycles_mod = index; + __bfin_cycles_off += (cycles << __bfin_cycles_mod) - (cycles << dpm_index); + __bfin_cycles_mod = dpm_index; #endif if (!lpj_ref_freq) { lpj_ref = loops_per_jiffy;
--
2.7.1.410.g6faf27b