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Commit c4685849 authored by Ondrej Zary's avatar Ondrej Zary Committed by Takashi Iwai
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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: default avatarOndrej Zary <linux@rainbow-software.org>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent b9619230

sound/pci/als4000.c

+1 −1
Original line number Diff line number Diff line
@@ -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);

}