ALSA: hda/realtek - Fix possible Oops with NULL input_mux
When BIOS is damn crazy and gives no pin-config at all, the driver might lead to a NULL dereference. Let's add a NULL check for such a case. Signed-off-by: Takashi Iwai <tiwai@suse.de>
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@ -302,6 +302,9 @@ static int alc_mux_select(struct hda_codec *codec, unsigned int adc_idx,
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int i, type, num_conns;
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hda_nid_t nid;
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if (!spec->input_mux)
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return 0;
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mux_idx = adc_idx >= spec->num_mux_defs ? 0 : adc_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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