From 5803a326465e38ee3cab8badbd8947732a8277f5 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 21 Feb 2012 11:59:45 +0100 Subject: [PATCH] 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 --- sound/pci/hda/patch_realtek.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c index eba50dff6130..997cc8127a08 100644 --- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -302,6 +302,9 @@ static int alc_mux_select(struct hda_codec *codec, unsigned int adc_idx, int i, type, num_conns; hda_nid_t nid; + if (!spec->input_mux) + return 0; + mux_idx = adc_idx >= spec->num_mux_defs ? 0 : adc_idx; imux = &spec->input_mux[mux_idx]; if (!imux->num_items && mux_idx > 0) -- 2.30.2