[PATCH] thermal: fix cpu cooling initialization

[Lukasz Luba]

This patch fixes issues with incorrect initialization
during cpu cooling registration.
The 'policy' and 'freq_table' must be initialized in cpufreq_cooling_device
before usage.

Signed-off-by: Lukasz Luba <lukasz.l...@arm.com>
---
 drivers/thermal/cpu_cooling.c | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

This patch fixes some issues to the patch set posted by Viresh.
I have tested it on Juno r2.

Regards,
Lukasz

diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c
index 99ffd9f..c682e25 100644
--- a/drivers/thermal/cpu_cooling.c
+++ b/drivers/thermal/cpu_cooling.c
@@ -691,6 +691,9 @@ static unsigned int find_next_max(struct 
cpufreq_frequency_table *table,
        struct thermal_cooling_device_ops *cooling_ops;
        bool first;
 
+       if (WARN_ON(!policy))
+               return ERR_PTR(-EINVAL);
+
        i = cpufreq_table_count_valid_entries(policy);
        if (!i) {
                pr_debug("%s: CPUFreq table not found or has no valid 
entries\n",
@@ -711,6 +714,7 @@ static unsigned int find_next_max(struct 
cpufreq_frequency_table *table,
                goto free_cdev;
        }
 
+       cpufreq_cdev->policy = policy;
        /* max_level is an index, not a counter */
        cpufreq_cdev->max_level = i - 1;
 
@@ -721,6 +725,18 @@ static unsigned int find_next_max(struct 
cpufreq_frequency_table *table,
                goto free_idle_time;
        }
 
+       /* Fill freq-table in descending order of frequencies */
+       for (i = 0, freq = -1; i <= cpufreq_cdev->max_level; i++) {
+               freq = find_next_max(policy->freq_table, freq);
+               cpufreq_cdev->freq_table[i].frequency = freq;
+
+               /* Warn for duplicate entries */
+               if (!freq)
+                       pr_warn("%s: table has duplicate entries\n", __func__);
+               else
+                       pr_debug("%s: freq:%u KHz\n", __func__, freq);
+       }
+
        if (capacitance) {
                cpufreq_cdev->plat_get_static_power = plat_static_func;
 
@@ -742,18 +758,6 @@ static unsigned int find_next_max(struct 
cpufreq_frequency_table *table,
        }
        cpufreq_cdev->id = ret;
 
-       /* Fill freq-table in descending order of frequencies */
-       for (i = 0, freq = -1; i <= cpufreq_cdev->max_level; i++) {
-               freq = find_next_max(policy->freq_table, freq);
-               cpufreq_cdev->freq_table[i].frequency = freq;
-
-               /* Warn for duplicate entries */
-               if (!freq)
-                       pr_warn("%s: table has duplicate entries\n", __func__);
-               else
-                       pr_debug("%s: freq:%u KHz\n", __func__, freq);
-       }
-
        snprintf(dev_name, sizeof(dev_name), "thermal-cpufreq-%d",
                 cpufreq_cdev->id);
 
-- 
1.9.1