cpufreq: qcom: fix memory leak in error path

If for some reason the speedbin length is incorrect, then there is a
memory leak in the error path because we never free the speedbin buffer.
This commit fixes the error path to always free the speedbin buffer.

Cc: v5.7+ <stable@vger.kernel.org> # v5.7+
Fixes: a8811ec764f9 ("cpufreq: qcom: Add support for krait based socs")
Signed-off-by: Fabien Parent <fabien.parent@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

diff --git a/drivers/cpufreq/qcom-cpufreq-nvmem.c b/drivers/cpufreq/qcom-cpufreq-nvmem.c
index 863548f..3bd38ac 100644 (file)
--- a/drivers/cpufreq/qcom-cpufreq-nvmem.c
+++ b/drivers/cpufreq/qcom-cpufreq-nvmem.c
@@ -213,6 +213,7 @@ static int qcom_cpufreq_krait_name_version(struct device *cpu_dev,
        int speed = 0, pvs = 0, pvs_ver = 0;
        u8 *speedbin;
        size_t len;
+       int ret = 0;
 
        speedbin = nvmem_cell_read(speedbin_nvmem, &len);
 
@@ -230,7 +231,8 @@ static int qcom_cpufreq_krait_name_version(struct device *cpu_dev,
                break;
        default:
                dev_err(cpu_dev, "Unable to read nvmem data. Defaulting to 0!\n");
-               return -ENODEV;
+               ret = -ENODEV;
+               goto len_error;
        }
 
        snprintf(*pvs_name, sizeof("speedXX-pvsXX-vXX"), "speed%d-pvs%d-v%d",
@@ -238,8 +240,9 @@ static int qcom_cpufreq_krait_name_version(struct device *cpu_dev,
 
        drv->versions = (1 << speed);
 
+len_error:
        kfree(speedbin);
-       return 0;
+       return ret;
 }
 
 static const struct qcom_cpufreq_match_data match_data_kryo = {