[bug report] drm/amd/pm: add smu_v13_0_5_ppt implementation

[Dan Carpenter]

Hello Yifan Zhang,

The patch 068ea8bdc0aa: "drm/amd/pm: add smu_v13_0_5_ppt
implementation" from Jan 21, 2022, leads to the following Smatch
static checker warning:

	drivers/gpu/drm/amd/amdgpu/../pm/swsmu/smu13/smu_v13_0_5_ppt.c:444 smu_v13_0_5_set_watermarks_table()
	warn: duplicate check 'clock_ranges' (previous on line 441)

drivers/gpu/drm/amd/amdgpu/../pm/swsmu/smu13/smu_v13_0_5_ppt.c
    434 static int smu_v13_0_5_set_watermarks_table(struct smu_context *smu,
    435                                 struct pp_smu_wm_range_sets *clock_ranges)
    436 {
    437         int i;
    438         int ret = 0;
    439         Watermarks_t *table = smu->smu_table.watermarks_table;
    440 
    441         if (!table || !clock_ranges)
                              ^^^^^^^^^^^^^

    442                 return -EINVAL;
    443 
--> 444         if (clock_ranges) {
                    ^^^^^^^^^^^^
This is always true.

    445                 if (clock_ranges->num_reader_wm_sets > NUM_WM_RANGES ||
    446                         clock_ranges->num_writer_wm_sets > NUM_WM_RANGES)
    447                         return -EINVAL;
    448 
    449                 for (i = 0; i < clock_ranges->num_reader_wm_sets; i++) {
    450                         table->WatermarkRow[WM_DCFCLK][i].MinClock =
    451                                 clock_ranges->reader_wm_sets[i].min_drain_clk_mhz;
    452                         table->WatermarkRow[WM_DCFCLK][i].MaxClock =
    453                                 clock_ranges->reader_wm_sets[i].max_drain_clk_mhz;
    454                         table->WatermarkRow[WM_DCFCLK][i].MinMclk =
    455                                 clock_ranges->reader_wm_sets[i].min_fill_clk_mhz;
    456                         table->WatermarkRow[WM_DCFCLK][i].MaxMclk =
    457                                 clock_ranges->reader_wm_sets[i].max_fill_clk_mhz;
    458 
    459                         table->WatermarkRow[WM_DCFCLK][i].WmSetting =
    460                                 clock_ranges->reader_wm_sets[i].wm_inst;
    461                 }
    462 
    463                 for (i = 0; i < clock_ranges->num_writer_wm_sets; i++) {
    464                         table->WatermarkRow[WM_SOCCLK][i].MinClock =
    465                                 clock_ranges->writer_wm_sets[i].min_fill_clk_mhz;
    466                         table->WatermarkRow[WM_SOCCLK][i].MaxClock =
    467                                 clock_ranges->writer_wm_sets[i].max_fill_clk_mhz;
    468                         table->WatermarkRow[WM_SOCCLK][i].MinMclk =
    469                                 clock_ranges->writer_wm_sets[i].min_drain_clk_mhz;
    470                         table->WatermarkRow[WM_SOCCLK][i].MaxMclk =
    471                                 clock_ranges->writer_wm_sets[i].max_drain_clk_mhz;
    472 
    473                         table->WatermarkRow[WM_SOCCLK][i].WmSetting =
    474                                 clock_ranges->writer_wm_sets[i].wm_inst;
    475                 }
    476 
    477                 smu->watermarks_bitmap |= WATERMARKS_EXIST;
    478         }
    479 
    480         /* pass data to smu controller */
    481         if ((smu->watermarks_bitmap & WATERMARKS_EXIST) &&
    482              !(smu->watermarks_bitmap & WATERMARKS_LOADED)) {
    483                 ret = smu_cmn_write_watermarks_table(smu);
    484                 if (ret) {
    485                         dev_err(smu->adev->dev, "Failed to update WMTABLE!");
    486                         return ret;
    487                 }
    488                 smu->watermarks_bitmap |= WATERMARKS_LOADED;
    489         }
    490 
    491         return 0;
    492 }

regards,
dan carpenter