cpufreq: qcom-kryo: Fix error handling in probe()

We should return if get_cpu_device() fails or it leads to a NULL
dereference.  Also dev_pm_opp_of_get_opp_desc_node() returns NULL on
error, it never returns error pointers.

Fixes: 46e2856b8e18 (cpufreq: Add Kryo CPU scaling driver)
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/cpufreq/qcom-cpufreq-kryo.c b/drivers/cpufreq/qcom-cpufreq-kryo.c
index 01bddac..29389ac 100644 (file)
--- a/drivers/cpufreq/qcom-cpufreq-kryo.c
+++ b/drivers/cpufreq/qcom-cpufreq-kryo.c
@@ -87,8 +87,8 @@ static int qcom_cpufreq_kryo_probe(struct platform_device *pdev)
        int ret;
 
        cpu_dev = get_cpu_device(0);
-       if (NULL == cpu_dev)
-               ret = -ENODEV;
+       if (!cpu_dev)
+               return -ENODEV;
 
        msm8996_version = qcom_cpufreq_kryo_get_msm_id();
        if (NUM_OF_MSM8996_VERSIONS == msm8996_version) {
@@ -97,8 +97,8 @@ static int qcom_cpufreq_kryo_probe(struct platform_device *pdev)
        }
 
        np = dev_pm_opp_of_get_opp_desc_node(cpu_dev);
-       if (IS_ERR(np))
-               return PTR_ERR(np);
+       if (!np)
+               return -ENOENT;
 
        ret = of_device_is_compatible(np, "operating-points-v2-kryo-cpu");
        if (!ret) {