[ALSA] sparc dbri: SMP fixes
The dbri driver hangs when used in kernel compiled with SMP support due to inproper locking. The patch fixes it. Signed-off-by: NKrzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: NTakashi Iwai <tiwai@suse.de> Signed-off-by: NJaroslav Kysela <perex@suse.cz>
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