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ALSA: als4000: Fix potentially invalid DMA mode setup

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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 <[email protected]>
Signed-off-by: Takashi Iwai <[email protected]>
This commit is contained in:
Ondrej Zary 2010-08-04 21:56:44 +02:00 • committed by Takashi Iwai
commit c4685849b4
1 changed files with 1 additions and 1 deletions
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2
sound/pci/als4000.c
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@ -765,7 +765,7 @@ static void snd_als4000_configure(struct snd_sb *chip)
snd_als4k_gcr_write(chip, i, 0);
/* enable burst mode to prevent dropouts during high PCI bus usage */
snd_als4k_gcr_write(chip, ALS4K_GCR99_DMA_EMULATION_CTRL,
snd_als4k_gcr_read(chip, ALS4K_GCR99_DMA_EMULATION_CTRL) | 0x04);
(snd_als4k_gcr_read(chip, ALS4K_GCR99_DMA_EMULATION_CTRL) & ~0x07) | 0x04);
spin_unlock_irq(&chip->reg_lock);
}