Hello Srinivas Kandagatla,
The patch fb5d11524eda: "ASoC: qcom: add mic support" from Feb 11, 2016, leads to the following static checker warning:
sound/soc/qcom/lpass-platform.c:555 lpass_platform_pcm_new() error: uninitialized symbol 'ret'.
sound/soc/qcom/lpass-platform.c 515 csubstream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; 516 if (csubstream) { 517 if (v->alloc_dma_channel) 518 data->wrdma_ch = v->alloc_dma_channel(drvdata, 519 SNDRV_PCM_STREAM_CAPTURE); 520 521 if (IS_ERR_VALUE(data->wrdma_ch)) 522 goto capture_alloc_err;
->wrdma_ch is an int so this should just be:
if (data->wrdma_ch < 0) { ret = data->wrdma_ch; goto capture_alloc_err; }
The other ->alloc_dma_channel uses the same IS_ERR_VALUE() check as well so we should probably clean that up as well. The IS_ERR_VALUE() function is for places which return unsigned long basically. No need to be fancy for normal "negative returns are error" code.
523 524 drvdata->substream[data->wrdma_ch] = csubstream; 525 526 ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, 527 soc_runtime->platform->dev, 528 size, &csubstream->dma_buffer); 529 if (ret) 530 goto capture_alloc_err; 531 532 ret = regmap_write(drvdata->lpaif_map, 533 LPAIF_WRDMACTL_REG(v, data->wrdma_ch), 0); 534 if (ret) { 535 dev_err(soc_runtime->dev, 536 "%s() error writing to wrdmactl reg: %d\n", 537 __func__, ret); 538 goto capture_reg_err; 539 } 540 } 541 542 return 0; 543 544 capture_reg_err: 545 if (csubstream) 546 snd_dma_free_pages(&csubstream->dma_buffer); 547 548 capture_alloc_err: 549 if (psubstream) 550 snd_dma_free_pages(&psubstream->dma_buffer); 551 552 playback_alloc_err: 553 dev_err(soc_runtime->dev, "Cannot allocate buffer(s)\n"); 554 555 return ret; 556 }
regards, dan carpenter