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ALSA: als4000: Fix potentially invalid DMA mode setup
My previous patch assumed that the DMA mode (represented by 3 lowest bits of ALS4K_GCR99_DMA_EMULATION_CTRL register) is set to the default value 0. If that's not the case, it might result in invalid mode to be set. This patch fixes this potential problem. Signed-off-by: Ondrej Zary <linux@rainbow-software.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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@ -765,7 +765,7 @@ static void snd_als4000_configure(struct snd_sb *chip)
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snd_als4k_gcr_write(chip, i, 0);
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/* enable burst mode to prevent dropouts during high PCI bus usage */
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snd_als4k_gcr_write(chip, ALS4K_GCR99_DMA_EMULATION_CTRL,
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snd_als4k_gcr_read(chip, ALS4K_GCR99_DMA_EMULATION_CTRL) | 0x04);
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(snd_als4k_gcr_read(chip, ALS4K_GCR99_DMA_EMULATION_CTRL) & ~0x07) | 0x04);
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spin_unlock_irq(&chip->reg_lock);
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}
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