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authorTakashi Iwai <tiwai@suse.de>2014-10-14 01:18:02 +0400
committerTakashi Iwai <tiwai@suse.de>2014-10-14 11:18:02 +0400
commit95926035b187cc9fee6fb61385b7da9c28123f74 (patch)
tree06f381609dd013ede40038643916a0d5deade923 /sound/isa
parent811deedebab38f8360a700a52b0b75688c9a10f7 (diff)
downloadlinux-95926035b187cc9fee6fb61385b7da9c28123f74.tar.xz
ALSA: emu10k1: Fix deadlock in synth voice lookup
The emu10k1 voice allocator takes voice_lock spinlock. When there is no empty stream available, it tries to release a voice used by synth, and calls get_synth_voice. The callback function, snd_emu10k1_synth_get_voice(), however, also takes the voice_lock, thus it deadlocks. The fix is simply removing the voice_lock holds in snd_emu10k1_synth_get_voice(), as this is always called in the spinlock context. Reported-and-tested-by: Arthur Marsh <arthur.marsh@internode.on.net> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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