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ALSA: au88x0: fix .pointer callback
Appearently, the used mask in the .pointer callback is invalid. It should be in period_bytes range. The period_bytes is pow(2), so simple bitwise operation is used. Idea was taken from ALSA bug#4455. Signed-off-by: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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1 changed files with 3 additions and 4 deletions
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@ -1255,8 +1255,8 @@ static int inline vortex_adbdma_getlinearpos(vortex_t * vortex, int adbdma)
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int temp;
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temp = hwread(vortex->mmio, VORTEX_ADBDMA_STAT + (adbdma << 2));
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temp = (dma->period_virt * dma->period_bytes) + (temp & POS_MASK);
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return (temp);
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temp = (dma->period_virt * dma->period_bytes) + (temp & (dma->period_bytes - 1));
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return temp;
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}
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static void vortex_adbdma_startfifo(vortex_t * vortex, int adbdma)
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@ -1504,8 +1504,7 @@ static int inline vortex_wtdma_getlinearpos(vortex_t * vortex, int wtdma)
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int temp;
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temp = hwread(vortex->mmio, VORTEX_WTDMA_STAT + (wtdma << 2));
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//temp = (temp & POS_MASK) + (((temp>>WT_SUBBUF_SHIFT) & WT_SUBBUF_MASK)*(dma->cfg0&POS_MASK));
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temp = (temp & POS_MASK) + ((dma->period_virt) * (dma->period_bytes));
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temp = (dma->period_virt * dma->period_bytes) + (temp & (dma->period_bytes - 1));
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return temp;
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}
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