From: Himanshu Jha <himanshujha199640@gmail.com>
Date: Mon, 11 Sep 2017 18:07:26 +0530
Subject: drm/amd/powerplay: remove unnecessary call to memset
Git-commit: 4a00f21db800bc64264bb6764c3d0d0878e9f4c4
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

call to memset to assign 0 value immediately after allocating
memory with kzalloc is unnecesaary as kzalloc allocates the memory
filled with 0 value.

Semantic patch used to resolve this issue:

@@
expression e,e2; constant c;
statement S;
@@

  e = kzalloc(e2, c);
  if(e == NULL) S
- memset(e, 0, e2);

Signed-off-by: Himanshu Jha <himanshujha199640@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/powerplay/hwmgr/process_pptables_v1_0.c |   20 ------------
 1 file changed, 20 deletions(-)

--- a/drivers/gpu/drm/amd/powerplay/hwmgr/process_pptables_v1_0.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/process_pptables_v1_0.c
@@ -173,8 +173,6 @@ static int get_vddc_lookup_table(
 	if (NULL == table)
 		return -ENOMEM;
 
-	memset(table, 0x00, table_size);
-
 	table->count = vddc_lookup_pp_tables->ucNumEntries;
 
 	for (i = 0; i < vddc_lookup_pp_tables->ucNumEntries; i++) {
@@ -335,8 +333,6 @@ static int get_valid_clk(
 	if (NULL == table)
 		return -ENOMEM;
 
-	memset(table, 0x00, table_size);
-
 	table->count = (uint32_t)clk_volt_pp_table->count;
 
 	for (i = 0; i < table->count; i++) {
@@ -390,8 +386,6 @@ static int get_mclk_voltage_dependency_t
 	if (NULL == mclk_table)
 		return -ENOMEM;
 
-	memset(mclk_table, 0x00, table_size);
-
 	mclk_table->count = (uint32_t)mclk_dep_table->ucNumEntries;
 
 	for (i = 0; i < mclk_dep_table->ucNumEntries; i++) {
@@ -439,8 +433,6 @@ static int get_sclk_voltage_dependency_t
 		if (NULL == sclk_table)
 			return -ENOMEM;
 
-		memset(sclk_table, 0x00, table_size);
-
 		sclk_table->count = (uint32_t)tonga_table->ucNumEntries;
 
 		for (i = 0; i < tonga_table->ucNumEntries; i++) {
@@ -473,8 +465,6 @@ static int get_sclk_voltage_dependency_t
 		if (NULL == sclk_table)
 			return -ENOMEM;
 
-		memset(sclk_table, 0x00, table_size);
-
 		sclk_table->count = (uint32_t)polaris_table->ucNumEntries;
 
 		for (i = 0; i < polaris_table->ucNumEntries; i++) {
@@ -525,8 +515,6 @@ static int get_pcie_table(
 		if (pcie_table == NULL)
 			return -ENOMEM;
 
-		memset(pcie_table, 0x00, table_size);
-
 		/*
 		* Make sure the number of pcie entries are less than or equal to sclk dpm levels.
 		* Since first PCIE entry is for ULV, #pcie has to be <= SclkLevel + 1.
@@ -567,8 +555,6 @@ static int get_pcie_table(
 		if (pcie_table == NULL)
 			return -ENOMEM;
 
-		memset(pcie_table, 0x00, table_size);
-
 		/*
 		* Make sure the number of pcie entries are less than or equal to sclk dpm levels.
 		* Since first PCIE entry is for ULV, #pcie has to be <= SclkLevel + 1.
@@ -615,8 +601,6 @@ static int get_cac_tdp_table(
 	if (NULL == tdp_table)
 		return -ENOMEM;
 
-	memset(tdp_table, 0x00, table_size);
-
 	hwmgr->dyn_state.cac_dtp_table = kzalloc(table_size, GFP_KERNEL);
 
 	if (NULL == hwmgr->dyn_state.cac_dtp_table) {
@@ -624,8 +608,6 @@ static int get_cac_tdp_table(
 		return -ENOMEM;
 	}
 
-	memset(hwmgr->dyn_state.cac_dtp_table, 0x00, table_size);
-
 	if (table->ucRevId < 3) {
 		const ATOM_Tonga_PowerTune_Table *tonga_table =
 			(ATOM_Tonga_PowerTune_Table *)table;
@@ -725,8 +707,6 @@ static int get_mm_clock_voltage_table(
 	if (NULL == mm_table)
 		return -ENOMEM;
 
-	memset(mm_table, 0x00, table_size);
-
 	mm_table->count = mm_dependency_table->ucNumEntries;
 
 	for (i = 0; i < mm_dependency_table->ucNumEntries; i++) {