drm/amd/powerplay: Fix psm_set_user_performance_state()

We now pass a pointer to a pointer which seems to be
what they meant in the first place.  The previous version
was modifying a pointer passed by value.

Fixes bug that was introduced by

commit 332798d40c2e91:drm/amd/powerplay: delete eventmgr layer in poweprlay
Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-By: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -294,7 +294,7 @@ int hwmgr_handle_task(struct pp_instance *handle, enum amd_pp_task task_id,
 	{
 		enum amd_pm_state_type ps;
 		enum PP_StateUILabel requested_ui_label;
-		struct pp_power_state *requested_ps;
+		struct pp_power_state *requested_ps = NULL;
 
 		if (input == NULL) {
 			ret = -EINVAL;
@@ -303,7 +303,7 @@ int hwmgr_handle_task(struct pp_instance *handle, enum amd_pp_task task_id,
 		ps = *(unsigned long *)input;
 
 		requested_ui_label = power_state_convert(ps);
-		ret = psm_set_user_performance_state(hwmgr, requested_ui_label, requested_ps);
+		ret = psm_set_user_performance_state(hwmgr, requested_ui_label, &requested_ps);
 		if (ret)
 			return ret;
 		ret = psm_adjust_power_state_dynamic(hwmgr, false, requested_ps);

drivers/gpu/drm/amd/powerplay/hwmgr/pp_psm.c

@@ -188,19 +188,19 @@ int psm_set_performance_states(struct pp_hwmgr *hwmgr)
 
 int psm_set_user_performance_state(struct pp_hwmgr *hwmgr,
 					enum PP_StateUILabel label_id,
-					struct pp_power_state *state)
+					struct pp_power_state **state)
 {
 	int table_entries;
 	int i;
 
 	table_entries = hwmgr->num_ps;
-	state = hwmgr->ps;
+	*state = hwmgr->ps;
 
 restart_search:
 	for (i = 0; i < table_entries; i++) {
-		if (state->classification.ui_label & label_id)
+		if ((*state)->classification.ui_label & label_id)
 			return 0;
-		state = (struct pp_power_state *)((unsigned long)state + hwmgr->ps_size);
+		*state = (struct pp_power_state *)((uintptr_t)*state + hwmgr->ps_size);
 	}
 
 	switch (label_id) {

drivers/gpu/drm/amd/powerplay/hwmgr/pp_psm.h

@@ -32,7 +32,7 @@ int psm_set_boot_states(struct pp_hwmgr *hwmgr);
 int psm_set_performance_states(struct pp_hwmgr *hwmgr);
 int psm_set_user_performance_state(struct pp_hwmgr *hwmgr,
 					enum PP_StateUILabel label_id,
-					struct pp_power_state *state);
+					struct pp_power_state **state);
 int psm_adjust_power_state_dynamic(struct pp_hwmgr *hwmgr,
 				bool skip,
 				struct pp_power_state *new_ps);