Thermal/int340x/processor_thermal: Fix memory leak

Address memory leak for buffer allocated with ACPI_ALLOCATE_BUFFER.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

1 files changed, 20 insertions, 9 deletions

diff --git a/drivers/thermal/int340x_thermal/processor_thermal_device.c b/drivers/thermal/int340x_thermal/processor_thermal_device.c
index f83c55b09e52..31bb553aac26 100644
--- a/drivers/thermal/int340x_thermal/processor_thermal_device.c
+++ b/drivers/thermal/int340x_thermal/processor_thermal_device.c
@@ -127,6 +127,7 @@ static int proc_thermal_add(struct device *dev,
         union acpi_object *elements, *ppcc;
         union acpi_object *p;
         int i;
+        int ret;
 
         adev = ACPI_COMPANION(dev);
 
@@ -137,16 +138,20 @@ static int proc_thermal_add(struct device *dev,
         p = buf.pointer;
         if (!p || (p->type != ACPI_TYPE_PACKAGE)) {
                 dev_err(dev, "Invalid PPCC data\n");
-                return -EFAULT;
+                ret = -EFAULT;
+                goto free_buffer;
         }
         if (!p->package.count) {
                 dev_err(dev, "Invalid PPCC package size\n");
-                return -EFAULT;
+                ret = -EFAULT;
+                goto free_buffer;
         }
 
         proc_priv = devm_kzalloc(dev, sizeof(*proc_priv), GFP_KERNEL);
-        if (!proc_priv)
-                return -ENOMEM;
+        if (!proc_priv) {
+                ret = -ENOMEM;
+                goto free_buffer;
+        }
 
         proc_priv->dev = dev;
         proc_priv->adev = adev;
@@ -154,9 +159,10 @@ static int proc_thermal_add(struct device *dev,
         for (i = 0; i < min((int)p->package.count - 1, 2); ++i) {
                 elements = &(p->package.elements[i+1]);
                 if (elements->type != ACPI_TYPE_PACKAGE ||
-                    elements->package.count != 6)
-                        return -EFAULT;
-
+                    elements->package.count != 6) {
+                        ret = -EFAULT;
+                        goto free_buffer;
+                }
                 ppcc = elements->package.elements;
                 proc_priv->power_limits[i].index = ppcc[0].integer.value;
                 proc_priv->power_limits[i].min_uw = ppcc[1].integer.value;
@@ -168,8 +174,13 @@ static int proc_thermal_add(struct device *dev,
 
         *priv = proc_priv;
 
-        return sysfs_create_group(&dev->kobj,
-                                  &power_limit_attribute_group);
+        ret = sysfs_create_group(&dev->kobj,
+                                 &power_limit_attribute_group);
+
+free_buffer:
+        kfree(buf.pointer);
+
+        return ret;
 }
 
 void proc_thermal_remove(struct proc_thermal_device *proc_priv)