Re: [PATCH 1/1] drm/amd/pm: fix the print_clk_levels issue for SMU v13.0.6

["Lazar, Lijo" <lijo.lazar@amd.com>]

On 9/26/2023 4:32 PM, Le Ma wrote:
> Pass the correct size to smu_v13_0_6_print_clks, otherwise
> the same place in buf will be re-written.
> 

Where is this getting affected? As far as I see, there are no multiple 
emits to the same buffer in this code path.

Thanks,
Lijo

> Change-Id: Ia0e12430d01146a11490204c1bab4b4f06cd17ea
> Signed-off-by: Le Ma <le.ma@amd.com>
> ---
>   .../drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c  | 24 +++++++++----------
>   1 file changed, 12 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c
> index 11a6cd96c601..19c117eb5ebe 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c
> +++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c
> @@ -821,12 +821,12 @@ static int smu_v13_0_6_get_current_clk_freq_by_table(struct smu_context *smu,
>   	return smu_v13_0_6_get_smu_metrics_data(smu, member_type, value);
>   }
>   
> -static int smu_v13_0_6_print_clks(struct smu_context *smu, char *buf,
> +static int smu_v13_0_6_print_clks(struct smu_context *smu, char *buf, int size,
>   				  struct smu_13_0_dpm_table *single_dpm_table,
>   				  uint32_t curr_clk, const char *clk_name)
>   {
>   	struct pp_clock_levels_with_latency clocks;
> -	int i, ret, size = 0, level = -1;
> +	int i, ret, level = -1;
>   	uint32_t clk1, clk2;
>   
>   	ret = smu_v13_0_6_get_clk_table(smu, &clocks, single_dpm_table);
> @@ -947,8 +947,8 @@ static int smu_v13_0_6_print_clk_levels(struct smu_context *smu,
>   
>   		single_dpm_table = &(dpm_context->dpm_tables.uclk_table);
>   
> -		return smu_v13_0_6_print_clks(smu, buf, single_dpm_table, now,
> -					      "mclk");
> +		return smu_v13_0_6_print_clks(smu, buf, size, single_dpm_table,
> +					      now, "mclk");
>   
>   	case SMU_SOCCLK:
>   		ret = smu_v13_0_6_get_current_clk_freq_by_table(smu, SMU_SOCCLK,
> @@ -961,8 +961,8 @@ static int smu_v13_0_6_print_clk_levels(struct smu_context *smu,
>   
>   		single_dpm_table = &(dpm_context->dpm_tables.soc_table);
>   
> -		return smu_v13_0_6_print_clks(smu, buf, single_dpm_table, now,
> -					      "socclk");
> +		return smu_v13_0_6_print_clks(smu, buf, size, single_dpm_table,
> +					      now, "socclk");
>   
>   	case SMU_FCLK:
>   		ret = smu_v13_0_6_get_current_clk_freq_by_table(smu, SMU_FCLK,
> @@ -975,8 +975,8 @@ static int smu_v13_0_6_print_clk_levels(struct smu_context *smu,
>   
>   		single_dpm_table = &(dpm_context->dpm_tables.fclk_table);
>   
> -		return smu_v13_0_6_print_clks(smu, buf, single_dpm_table, now,
> -					      "fclk");
> +		return smu_v13_0_6_print_clks(smu, buf, size, single_dpm_table,
> +					      now, "fclk");
>   
>   	case SMU_VCLK:
>   		ret = smu_v13_0_6_get_current_clk_freq_by_table(smu, SMU_VCLK,
> @@ -989,8 +989,8 @@ static int smu_v13_0_6_print_clk_levels(struct smu_context *smu,
>   
>   		single_dpm_table = &(dpm_context->dpm_tables.vclk_table);
>   
> -		return smu_v13_0_6_print_clks(smu, buf, single_dpm_table, now,
> -					      "vclk");
> +		return smu_v13_0_6_print_clks(smu, buf, size, single_dpm_table,
> +					      now, "vclk");
>   
>   	case SMU_DCLK:
>   		ret = smu_v13_0_6_get_current_clk_freq_by_table(smu, SMU_DCLK,
> @@ -1003,8 +1003,8 @@ static int smu_v13_0_6_print_clk_levels(struct smu_context *smu,
>   
>   		single_dpm_table = &(dpm_context->dpm_tables.dclk_table);
>   
> -		return smu_v13_0_6_print_clks(smu, buf, single_dpm_table, now,
> -					      "dclk");
> +		return smu_v13_0_6_print_clks(smu, buf, size, single_dpm_table,
> +					      now, "dclk");
>   
>   	default:
>   		break;