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ASoC: AMD: Always subtract bytescount

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It is always correct to subtract out the starting bytescount value.  Even
in the case of 2^64 byte rollover (292 Million Years in the future
@ 48000 Hz) the math still works out.

Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Daniel Kurtz 2018-07-02 15:19:52 -06:00 committed by Mark Brown
parent 30896d3619
commit 715cdce044
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GPG Key ID: 24D68B725D5487D0
1 changed files with 1 additions and 2 deletions
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3
sound/soc/amd/acp-pcm-dma.c
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@ -995,8 +995,7 @@ static snd_pcm_uframes_t acp_dma_pointer(struct snd_pcm_substream *substream)
buffersize = frames_to_bytes(runtime, runtime->buffer_size); buffersize = frames_to_bytes(runtime, runtime->buffer_size);
bytescount = acp_get_byte_count(rtd); bytescount = acp_get_byte_count(rtd);
if (bytescount > rtd->bytescount) bytescount -= rtd->bytescount;
bytescount -= rtd->bytescount;
pos = do_div(bytescount, buffersize); pos = do_div(bytescount, buffersize);
return bytes_to_frames(runtime, pos); return bytes_to_frames(runtime, pos);
} }