amdgpu_pm_fix.patch

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c	2020-07-23 13:58:14.392337637 +0900
+++ a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c	2020-08-02 12:26:10.677578297 +0900
@@ -775,14 +775,15 @@
 		tmp_str++;
 	while (isspace(*++tmp_str));
 
-	while (tmp_str[0]) {
-		sub_str = strsep(&tmp_str, delimiter);
+	while (tmp_str[0] && (sub_str = strsep(&tmp_str, delimiter)) != NULL) {
 		ret = kstrtol(sub_str, 0, &parameter[parameter_size]);
 		if (ret)
 			return -EINVAL;
 		parameter_size++;
 
-		while (isspace(*tmp_str))
+		if (tmp_str == NULL) break;
+
+		while (*tmp_str && isspace(*tmp_str))
 			tmp_str++;
 	}