drm/amd/powerplay: remove unnecessary call to memset

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>

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/process_pptables_v1_0.c b/drivers/gpu/drm/amd/powerplay/hwmgr/process_pptables_v1_0.c
index 84f01fd33aff707e9adb8a701356b4688800d57e..d1af1483c69bafe427f4835c55a4bea93f31a66c 100644 (file)
--- 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_table(
        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_table(
                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_table(
                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++) {