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ALSA: au88x0: Fix overlapped PCM pointer 

au88x0 hardware seems returning the current pointer at the buffer
boundary instead of going back to zero.  This results in spewing
warnings from PCM core.

This patch corrects the return value from the pointer callback within
the proper value range, just returning zero if the position is equal
or above the buffer size.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2016-03-10 21:03:09 +01:00
parent d2c5cf88d5
commit 58a8738cfc
1 changed files with 4 additions and 1 deletions
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5
sound/pci/au88x0/au88x0_pcm.c
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@ -432,7 +432,10 @@ static snd_pcm_uframes_t snd_vortex_pcm_pointer(struct snd_pcm_substream *substr
#endif
//printk(KERN_INFO "vortex: pointer = 0x%x\n", current_ptr);
spin_unlock(&chip->lock);
return (bytes_to_frames(substream->runtime, current_ptr));
current_ptr = bytes_to_frames(substream->runtime, current_ptr);
if (current_ptr >= substream->runtime->buffer_size)
current_ptr = 0;
return current_ptr;
}
/* operators */