drm/amd/powerplay: fix static checker warnings in iceland_smc.c

add array length check to avoid buffer overflow.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/powerplay/smumgr/iceland_smc.c b/drivers/gpu/drm/amd/powerplay/smumgr/iceland_smc.c
index eda802bc63c888ead2082e4362768ba763d1d83f..8c889caba420dc2d55ec9340d46ab0a92d468514 100644 (file)
--- a/drivers/gpu/drm/amd/powerplay/smumgr/iceland_smc.c
+++ b/drivers/gpu/drm/amd/powerplay/smumgr/iceland_smc.c
@@ -2458,7 +2458,7 @@ static int iceland_set_mc_special_registers(struct pp_hwmgr *hwmgr,
                        PP_ASSERT_WITH_CODE((j <= SMU71_DISCRETE_MC_REGISTER_ARRAY_SIZE),
                                "Invalid VramInfo table.", return -EINVAL);
 
-                       if (!data->is_memory_gddr5) {
+                       if (!data->is_memory_gddr5 && j < SMU71_DISCRETE_MC_REGISTER_ARRAY_SIZE) {
                                table->mc_reg_address[j].s1 = mmMC_PMG_AUTO_CMD;
                                table->mc_reg_address[j].s0 = mmMC_PMG_AUTO_CMD;
                                for (k = 0; k < table->num_entries; k++) {