On 11/25/21 8:29 PM, Dan Carpenter wrote:
> Hello Vijendar Mukunda,
>
> The patch 34a0094b9ff7: "ASoC: amd: add vangogh machine driver" from
> Oct 14, 2021, leads to the following Smatch static checker warning:
>
> sound/soc/amd/vangogh/acp5x-mach.c:190 acp5x_cs35l41_hw_params()
> error: uninitialized symbol 'ret'.
will fix it.
>
> sound/soc/amd/vangogh/acp5x-mach.c
> 158 static int acp5x_cs35l41_hw_params(struct snd_pcm_substream *substream,
> 159 struct snd_pcm_hw_params *params)
> 160 {
> 161 struct snd_soc_pcm_runtime *rtd = substream->private_data;
> 162 struct snd_soc_card *card = rtd->card;
> 163 struct snd_soc_dai *codec_dai;
> 164 int ret, i;
> 165 unsigned int num_codecs = rtd->num_codecs;
> 166 unsigned int bclk_val;
> 167
> 168 for (i = 0; i < num_codecs; i++) {
> 169 codec_dai = asoc_rtd_to_codec(rtd, i);
> 170 if ((strcmp(codec_dai->name, "spi-VLV1776:00") == 0) ||
> 171 (strcmp(codec_dai->name, "spi-VLV1776:01") == 0)) {
>
> How positive are we that we're always going to find one of these codecs?
> Smatch is worried we might not find them.
This code executed for CS35l41 codec DAI's only on VG platform. If both
the Codec dai's didn't found, sound card won't get registered. we have
added condition check so that for only these codec dai's set sysclk
change should be applied.
>
> 172 switch (params_rate(params)) {
> 173 case 48000:
> 174 bclk_val = 1536000;
> 175 break;
> 176 default:
> 177 dev_err(card->dev, "Invalid Samplerate:0x%x\n",
> 178 params_rate(params));
> 179 return -EINVAL;
> 180 }
> 181 ret = snd_soc_component_set_sysclk(codec_dai->component,
> 182 0, 0, bclk_val, SND_SOC_CLOCK_IN);
> 183 if (ret < 0) {
> 184 dev_err(card->dev, "failed to set sysclk for CS35l41 dai\n");
> 185 return ret;
> 186 }
> 187 }
> 188 }
> 189
> --> 190 return ret;
> ^^^^^^^^^^
> Also it's a bit more readable to "return 0;" if we know this is a
> success path.
will fix it.
>
> 191 }
>
> regards,
> dan carpenter
>
