Commit cce4aa37 authored Dec 02, 2011 by Takashi Iwai

ALSA: hda/realtek - Fix Oops in alc_mux_select()



When no imux is available (e.g. a single capture source),
alc_auto_init_input_src() may trigger an Oops due to the access to -1.
Add a proper zero-check to avoid it.

Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

parent fc084e0b

sound/pci/hda/patch_realtek.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -297,6 +297,8 @@ static int alc_mux_select(struct hda_codec *codec, unsigned int adc_idx,
		imux = &spec->input_mux[mux_idx];
		if (!imux->num_items && mux_idx > 0)
		imux = &spec->input_mux[0];
		if (!imux->num_items)
		return 0;

		if (idx >= imux->num_items)
		idx = imux->num_items - 1;