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ASoC: qcom: Fix error code in lpass_platform_copy()

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The copy_to/from_user() functions return the number of bytes remaining
to be copied.  This function needs to return negative error codes
because snd_soc_pcm_component_copy_user() treats positive returns as
success in soc_component_ret().

Fixes: 7d7209557b ("ASoC: qcom: Add support for codec dma driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20220301081104.GB17375@kili
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Dan Carpenter 2022-03-01 11:11:04 +03:00 committed by Mark Brown
parent de2c6f9881
commit d5dd781bcc
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 10 additions and 6 deletions
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16
sound/soc/qcom/lpass-platform.c
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@ -1229,15 +1229,19 @@ static int lpass_platform_copy(struct snd_soc_component *component,
channel * (rt->dma_bytes / rt->channels));
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
if (is_cdc_dma_port(dai_id))
if (is_cdc_dma_port(dai_id)) {
ret = copy_from_user_toio(dma_buf, buf, bytes);
else
ret = copy_from_user((void __force *)dma_buf, buf, bytes);
} else {
if (copy_from_user((void __force *)dma_buf, buf, bytes))
ret = -EFAULT;
}
} else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
if (is_cdc_dma_port(dai_id))
if (is_cdc_dma_port(dai_id)) {
ret = copy_to_user_fromio(buf, dma_buf, bytes);
else
ret = copy_to_user(buf, (void __force *)dma_buf, bytes);
} else {
if (copy_to_user(buf, (void __force *)dma_buf, bytes))
ret = -EFAULT;
}
}
return ret;