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>
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@ -297,6 +297,8 @@ static int alc_mux_select(struct hda_codec *codec, unsigned int adc_idx,
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imux = &spec->input_mux[mux_idx];
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imux = &spec->input_mux[mux_idx];
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if (!imux->num_items && mux_idx > 0)
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if (!imux->num_items && mux_idx > 0)
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imux = &spec->input_mux[0];
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imux = &spec->input_mux[0];
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if (!imux->num_items)
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return 0;
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if (idx >= imux->num_items)
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if (idx >= imux->num_items)
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idx = imux->num_items - 1;
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idx = imux->num_items - 1;
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