Message-ID: <alpine.DEB.2.20.1710131755170.6944@hadrien>
Date:   Fri, 13 Oct 2017 17:56:10 +0200 (CEST)
From:   Julia Lawall <julia.lawall@...6.fr>
To:     Harsha Sharma <harshasharmaiitr@...il.com>
cc:     alexander.deucher@....com, christian.koenig@....com,
        airlied@...ux.ie, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        outreachy-kernel@...glegroups.com
Subject: Re: [Outreachy kernel] [PATCH] drm/amd/powerplay: Remove unnecessary
 cast on void pointer



On Fri, 13 Oct 2017, Harsha Sharma wrote:

> Done with following coccinelle patch
>
> @r@
> expression x;
> void* e;
> type T;
> identifier f;
> @@
> (
>   *((T *)e)
> |
>   ((T *)x)[...]
> |
>   ((T*)x)->f
> |
>
> - (T*)
>   e
> )
>
> Signed-off-by: Harsha Sharma <harshasharmaiitr@...il.com>
> ---
>  drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c        |  6 +++---
>  drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c           |  8 ++++----
>  drivers/gpu/drm/amd/powerplay/hwmgr/ppatomctrl.c      |  2 +-
>  drivers/gpu/drm/amd/powerplay/hwmgr/ppatomfwctrl.c    |  6 +++---
>  drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c |  2 +-
>  drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c      | 18 +++++++++---------
>  drivers/gpu/drm/amd/powerplay/hwmgr/smu7_thermal.c    |  4 ++--
>  drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c    | 12 ++++++------
>  drivers/gpu/drm/amd/powerplay/hwmgr/vega10_thermal.c  |  2 +-
>  9 files changed, 30 insertions(+), 30 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c
> index bc839ff0bdd0..897f666622f3 100644
> --- a/drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c
> +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c
> @@ -474,7 +474,7 @@ static int cz_tf_upload_pptable_to_smu(struct pp_hwmgr *hwmgr, void *input,
>  	PP_ASSERT_WITH_CODE((0 == ret && NULL != table),
>  			    "Fail to get clock table from SMU!", return -EINVAL;);
>
> -	clock_table = (struct SMU8_Fusion_ClkTable *)table;
> +	clock_table = table;
>
>  	/* patch clock table */
>  	PP_ASSERT_WITH_CODE((vddc_table->count <= CZ_MAX_HARDWARE_POWERLEVELS),
> @@ -868,8 +868,8 @@ static int cz_tf_update_low_mem_pstate(struct pp_hwmgr *hwmgr,
>  {
>  	bool disable_switch;
>  	bool enable_low_mem_state;
> -	struct cz_hwmgr *hw_data = (struct cz_hwmgr *)(hwmgr->backend);
> -	const struct phm_set_power_state_input *states = (struct phm_set_power_state_input *)input;
> +	struct cz_hwmgr *hw_data = (hwmgr->backend);
> +	const struct phm_set_power_state_input *states = input;
>  	const struct cz_power_state *pnew_state = cast_const_PhwCzPowerState(states->pnew_state);
>
>  	if (hw_data->sys_info.nb_dpm_enable) {
> diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
> index 9547f265a8bb..5d63a1b18b39 100644
> --- a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
> +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
> @@ -469,7 +469,7 @@ int phm_reset_single_dpm_table(void *table,
>  {
>  	int i;
>
> -	struct vi_dpm_table *dpm_table = (struct vi_dpm_table *)table;
> +	struct vi_dpm_table *dpm_table = table;
>
>  	dpm_table->count = count > max ? max : count;
>
> @@ -484,7 +484,7 @@ void phm_setup_pcie_table_entry(
>  	uint32_t index, uint32_t pcie_gen,
>  	uint32_t pcie_lanes)
>  {
> -	struct vi_dpm_table *dpm_table = (struct vi_dpm_table *)table;
> +	struct vi_dpm_table *dpm_table = table;
>  	dpm_table->dpm_level[index].value = pcie_gen;
>  	dpm_table->dpm_level[index].param1 = pcie_lanes;
>  	dpm_table->dpm_level[index].enabled = 1;
> @@ -494,7 +494,7 @@ int32_t phm_get_dpm_level_enable_mask_value(void *table)
>  {
>  	int32_t i;
>  	int32_t mask = 0;
> -	struct vi_dpm_table *dpm_table = (struct vi_dpm_table *)table;
> +	struct vi_dpm_table *dpm_table = table;
>
>  	for (i = dpm_table->count; i > 0; i--) {
>  		mask = mask << 1;
> @@ -566,7 +566,7 @@ int phm_find_boot_level(void *table,
>  {
>  	int result = -EINVAL;
>  	uint32_t i;
> -	struct vi_dpm_table *dpm_table = (struct vi_dpm_table *)table;
> +	struct vi_dpm_table *dpm_table = table;
>
>  	for (i = 0; i < dpm_table->count; i++) {
>  		if (value == dpm_table->dpm_level[i].value) {
> diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/ppatomctrl.c b/drivers/gpu/drm/amd/powerplay/hwmgr/ppatomctrl.c
> index 953e0c9ad7cd..676f2e8bb2ee 100644
> --- a/drivers/gpu/drm/amd/powerplay/hwmgr/ppatomctrl.c
> +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/ppatomctrl.c
> @@ -579,7 +579,7 @@ static ATOM_GPIO_PIN_LUT *get_gpio_lookup_table(void *device)
>  	PP_ASSERT_WITH_CODE((NULL != table_address),
>  			"Error retrieving BIOS Table Address!", return NULL;);
>
> -	return (ATOM_GPIO_PIN_LUT *)table_address;
> +	return table_address;
>  }
>
>  /**
> diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/ppatomfwctrl.c b/drivers/gpu/drm/amd/powerplay/hwmgr/ppatomfwctrl.c
> index c062844b15f3..05e3f5302994 100644
> --- a/drivers/gpu/drm/amd/powerplay/hwmgr/ppatomfwctrl.c
> +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/ppatomfwctrl.c
> @@ -66,7 +66,7 @@ static struct atom_voltage_objects_info_v4_1 *pp_atomfwctrl_get_voltage_info_tab
>          "Error retrieving BIOS Table Address!",
>          return NULL);
>
> -    return (struct atom_voltage_objects_info_v4_1 *)table_address;
> +    return table_address;
>  }
>
>  /**
> @@ -173,7 +173,7 @@ static struct atom_gpio_pin_lut_v2_1 *pp_atomfwctrl_get_gpio_lookup_table(
>  			"Error retrieving BIOS Table Address!",
>  			return NULL);
>
> -	return (struct atom_gpio_pin_lut_v2_1 *)table_address;
> +	return table_address;
>  }
>
>  static bool pp_atomfwctrl_lookup_gpio_pin(
> @@ -542,4 +542,4 @@ int pp_atomfwctrl_get_vbios_bootup_values(struct pp_hwmgr *hwmgr,
>  		boot_values->ulDCEFClk   = frequency;
>
>  	return 0;
> -}
> \ No newline at end of file
> +}
> diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c b/drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c
> index 2716721e5453..e795b14eaabe 100644
> --- a/drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c
> +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c
> @@ -807,7 +807,7 @@ static const ATOM_PPLIB_POWERPLAYTABLE *get_powerplay_table(
>  		hwmgr->soft_pp_table_size = size;
>  	}
>
> -	return (const ATOM_PPLIB_POWERPLAYTABLE *)table_addr;
> +	return table_addr;
>  }
>
>  int pp_tables_get_response_times(struct pp_hwmgr *hwmgr,
> diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
> index c2743233ba10..9b4b644525c9 100644
> --- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
> +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
> @@ -2954,11 +2954,11 @@ static int smu7_get_pp_table_entry_callback_func_v1(struct pp_hwmgr *hwmgr,
>  {
>  	struct smu7_hwmgr *data = (struct smu7_hwmgr *)(hwmgr->backend);
>  	struct smu7_power_state  *smu7_power_state =
> -			(struct smu7_power_state *)(&(power_state->hardware));
> +			(&(power_state->hardware));

There are extra parentheses here.  Check the rest of the patch for this
issue.  I saw at least one other occurrence.

julia

>  	struct smu7_performance_level *performance_level;
> -	ATOM_Tonga_State *state_entry = (ATOM_Tonga_State *)state;
> +	ATOM_Tonga_State *state_entry = state;
>  	ATOM_Tonga_POWERPLAYTABLE *powerplay_table =
> -			(ATOM_Tonga_POWERPLAYTABLE *)pp_table;
> +			pp_table;
>  	PPTable_Generic_SubTable_Header *sclk_dep_table =
>  			(PPTable_Generic_SubTable_Header *)
>  			(((unsigned long)powerplay_table) +
> @@ -3391,7 +3391,7 @@ static int smu7_read_sensor(struct pp_hwmgr *hwmgr, int idx,
>  		if (*size < sizeof(struct pp_gpu_power))
>  			return -EINVAL;
>  		*size = sizeof(struct pp_gpu_power);
> -		return smu7_get_gpu_power(hwmgr, (struct pp_gpu_power *)value);
> +		return smu7_get_gpu_power(hwmgr, value);
>  	default:
>  		return -EINVAL;
>  	}
> @@ -3400,7 +3400,7 @@ static int smu7_read_sensor(struct pp_hwmgr *hwmgr, int idx,
>  static int smu7_find_dpm_states_clocks_in_dpm_table(struct pp_hwmgr *hwmgr, const void *input)
>  {
>  	const struct phm_set_power_state_input *states =
> -			(const struct phm_set_power_state_input *)input;
> +			input;
>  	const struct smu7_power_state *smu7_ps =
>  			cast_const_phw_smu7_power_state(states->pnew_state);
>  	struct smu7_hwmgr *data = (struct smu7_hwmgr *)(hwmgr->backend);
> @@ -3478,7 +3478,7 @@ static int smu7_request_link_speed_change_before_state_change(
>  		struct pp_hwmgr *hwmgr, const void *input)
>  {
>  	const struct phm_set_power_state_input *states =
> -			(const struct phm_set_power_state_input *)input;
> +			input;
>  	struct smu7_hwmgr *data = (struct smu7_hwmgr *)(hwmgr->backend);
>  	const struct smu7_power_state *smu7_nps =
>  			cast_const_phw_smu7_power_state(states->pnew_state);
> @@ -3558,7 +3558,7 @@ static int smu7_populate_and_upload_sclk_mclk_dpm_levels(
>  {
>  	int result = 0;
>  	const struct phm_set_power_state_input *states =
> -			(const struct phm_set_power_state_input *)input;
> +			input;
>  	const struct smu7_power_state *smu7_ps =
>  			cast_const_phw_smu7_power_state(states->pnew_state);
>  	struct smu7_hwmgr *data = (struct smu7_hwmgr *)(hwmgr->backend);
> @@ -3729,7 +3729,7 @@ static int smu7_generate_dpm_level_enable_mask(
>  {
>  	int result;
>  	const struct phm_set_power_state_input *states =
> -			(const struct phm_set_power_state_input *)input;
> +			input;
>  	struct smu7_hwmgr *data = (struct smu7_hwmgr *)(hwmgr->backend);
>  	const struct smu7_power_state *smu7_ps =
>  			cast_const_phw_smu7_power_state(states->pnew_state);
> @@ -3789,7 +3789,7 @@ static int smu7_notify_link_speed_change_after_state_change(
>  		struct pp_hwmgr *hwmgr, const void *input)
>  {
>  	const struct phm_set_power_state_input *states =
> -			(const struct phm_set_power_state_input *)input;
> +			input;
>  	struct smu7_hwmgr *data = (struct smu7_hwmgr *)(hwmgr->backend);
>  	const struct smu7_power_state *smu7_ps =
>  			cast_const_phw_smu7_power_state(states->pnew_state);
> diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_thermal.c b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_thermal.c
> index baddb569a8b8..a17443d5aa61 100644
> --- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_thermal.c
> +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_thermal.c
> @@ -452,7 +452,7 @@ static int tf_smu7_thermal_start_smc_fan_control(struct pp_hwmgr *hwmgr,
>  static int tf_smu7_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
>  		void *input, void *output, void *storage, int result)
>  {
> -	struct PP_TemperatureRange *range = (struct PP_TemperatureRange *)input;
> +	struct PP_TemperatureRange *range = input;
>
>  	if (range == NULL)
>  		return -EINVAL;
> @@ -581,4 +581,4 @@ void pp_smu7_thermal_fini(struct pp_hwmgr *hwmgr)
>  	phm_destroy_table(hwmgr, &(hwmgr->set_temperature_range));
>  	phm_destroy_table(hwmgr, &(hwmgr->start_thermal_controller));
>  	return;
> -}
> \ No newline at end of file
> +}
> diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
> index f8f02e70b8bc..9e82eed7e7a9 100644
> --- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
> +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
> @@ -2994,9 +2994,9 @@ static int vega10_get_pp_table_entry_callback_func(struct pp_hwmgr *hwmgr,
>  	struct vega10_power_state *vega10_power_state =
>  			cast_phw_vega10_power_state(&(power_state->hardware));
>  	struct vega10_performance_level *performance_level;
> -	ATOM_Vega10_State *state_entry = (ATOM_Vega10_State *)state;
> +	ATOM_Vega10_State *state_entry = state;
>  	ATOM_Vega10_POWERPLAYTABLE *powerplay_table =
> -			(ATOM_Vega10_POWERPLAYTABLE *)pp_table;
> +			pp_table;
>  	ATOM_Vega10_SOCCLK_Dependency_Table *socclk_dep_table =
>  			(ATOM_Vega10_SOCCLK_Dependency_Table *)
>  			(((unsigned long)powerplay_table) +
> @@ -3306,7 +3306,7 @@ static int vega10_apply_state_adjust_rules(struct pp_hwmgr *hwmgr,
>  static int vega10_find_dpm_states_clocks_in_dpm_table(struct pp_hwmgr *hwmgr, const void *input)
>  {
>  	const struct phm_set_power_state_input *states =
> -			(const struct phm_set_power_state_input *)input;
> +			input;
>  	const struct vega10_power_state *vega10_ps =
>  			cast_const_phw_vega10_power_state(states->pnew_state);
>  	struct vega10_hwmgr *data =
> @@ -3397,7 +3397,7 @@ static int vega10_populate_and_upload_sclk_mclk_dpm_levels(
>  {
>  	int result = 0;
>  	const struct phm_set_power_state_input *states =
> -			(const struct phm_set_power_state_input *)input;
> +			input;
>  	const struct vega10_power_state *vega10_ps =
>  			cast_const_phw_vega10_power_state(states->pnew_state);
>  	struct vega10_hwmgr *data =
> @@ -3813,7 +3813,7 @@ static int vega10_generate_dpm_level_enable_mask(
>  	struct vega10_hwmgr *data =
>  			(struct vega10_hwmgr *)(hwmgr->backend);
>  	const struct phm_set_power_state_input *states =
> -			(const struct phm_set_power_state_input *)input;
> +			input;
>  	const struct vega10_power_state *vega10_ps =
>  			cast_const_phw_vega10_power_state(states->pnew_state);
>  	int i;
> @@ -4042,7 +4042,7 @@ static int vega10_read_sensor(struct pp_hwmgr *hwmgr, int idx,
>  			ret = -EINVAL;
>  		else {
>  			*size = sizeof(struct pp_gpu_power);
> -			ret = vega10_get_gpu_power(hwmgr, (struct pp_gpu_power *)value);
> +			ret = vega10_get_gpu_power(hwmgr, value);
>  		}
>  		break;
>  	default:
> diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_thermal.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_thermal.c
> index d44243441d28..4f832c607514 100644
> --- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_thermal.c
> +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_thermal.c
> @@ -647,7 +647,7 @@ int tf_vega10_thermal_start_smc_fan_control(struct pp_hwmgr *hwmgr,
>  int tf_vega10_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
>  		void *input, void *output, void *storage, int result)
>  {
> -	struct PP_TemperatureRange *range = (struct PP_TemperatureRange *)input;
> +	struct PP_TemperatureRange *range = input;
>
>  	if (range == NULL)
>  		return -EINVAL;
> --
> 2.11.0
>
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