drm/amdgpu/pm: Check input value for CUSTOM profile mode setting on legacy SOCs

Check the input value for CUSTOM profile mode setting on legacy
SOCs. Otherwise we may use uninitalized value of input[]
Signed-off-by: Ma Jun <Jun.Ma2@amd.com>
Reviewed-by: Yang Wang <kevinyang.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c

@@ -5647,7 +5647,7 @@ static int smu7_set_power_profile_mode(struct pp_hwmgr *hwmgr, long *input, uint
 	mode = input[size];
 	switch (mode) {
 	case PP_SMC_POWER_PROFILE_CUSTOM:
-		if (size < 8 && size != 0)
+		if (size != 8 && size != 0)
 			return -EINVAL;
 		/* If only CUSTOM is passed in, use the saved values. Check
 		 * that we actually have a CUSTOM profile by ensuring that

drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_hwmgr.c

@@ -4102,9 +4102,11 @@ static int vega20_set_power_profile_mode(struct pp_hwmgr *hwmgr, long *input, ui
 	if (power_profile_mode == PP_SMC_POWER_PROFILE_CUSTOM) {
 		struct vega20_hwmgr *data =
 			(struct vega20_hwmgr *)(hwmgr->backend);
-		if (size == 0 && !data->is_custom_profile_set)
+
+		if (size != 10 && size != 0)
 			return -EINVAL;
-		if (size < 10 && size != 0)
+
+		if (size == 0 && !data->is_custom_profile_set)
 			return -EINVAL;
 
 		result = vega20_get_activity_monitor_coeff(hwmgr,
@@ -4166,6 +4168,8 @@ static int vega20_set_power_profile_mode(struct pp_hwmgr *hwmgr, long *input, ui
 			activity_monitor.Fclk_PD_Data_error_coeff = input[8];
 			activity_monitor.Fclk_PD_Data_error_rate_coeff = input[9];
 			break;
+		default:
+			return -EINVAL;
 		}
 
 		result = vega20_set_activity_monitor_coeff(hwmgr,