[bug report] cpufreq: tegra186: add OPP support and set bandwidth

[Dan Carpenter <dan.carpenter@linaro.org>]

Hello Aaron Kling,

Commit 71c46a6457e0 ("cpufreq: tegra186: add OPP support and set
bandwidth") from Oct 21, 2025 (linux-next), leads to the following
Smatch static checker warning:

	drivers/cpufreq/tegra186-cpufreq.c:197 tegra186_cpufreq_init()
	error: uninitialized symbol 'freq_table'.

drivers/cpufreq/tegra186-cpufreq.c
    174 static int tegra186_cpufreq_init(struct cpufreq_policy *policy)
    175 {
    176         struct tegra186_cpufreq_data *data = cpufreq_get_driver_data();
    177         unsigned int cluster = data->cpus[policy->cpu].bpmp_cluster_id;
    178         struct cpufreq_frequency_table *freq_table;
    179         struct cpufreq_frequency_table *bpmp_lut;
    180         u32 cpu;
    181         int ret;
    182 
    183         policy->cpuinfo.transition_latency = 300 * 1000;
    184         policy->driver_data = NULL;
    185 
    186         /* set same policy for all cpus in a cluster */
    187         for (cpu = 0; cpu < ARRAY_SIZE(tegra186_cpus); cpu++) {
    188                 if (data->cpus[cpu].bpmp_cluster_id == cluster)
    189                         cpumask_set_cpu(cpu, policy->cpus);
    190         }
    191 
    192         bpmp_lut = data->clusters[cluster].bpmp_lut;
    193 
    194         if (data->icc_dram_bw_scaling) {
    195                 ret = tegra_cpufreq_init_cpufreq_table(policy, bpmp_lut, &freq_table);
    196                 if (!ret) {
--> 197                         policy->freq_table = freq_table;

tegra_cpufreq_init_cpufreq_table() will return zero if there are no
available opps.  The freq_table will be uninitialized in that case.
It's this path:

          122          max_opps = dev_pm_opp_get_opp_count(cpu_dev);
          123          if (max_opps <= 0) {
          124                  dev_err(cpu_dev, "Failed to add OPPs\n");
          125                  return max_opps;
          126          }

    198                         return 0;
    199                 }
    200         }
    201 
    202         data->icc_dram_bw_scaling = false;
    203         policy->freq_table = bpmp_lut;
    204         pr_info("OPP tables missing from DT, EMC frequency scaling disabled\n");
    205 
    206         return 0;
    207 }

regards,
dan carpenter