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>
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index eba50dff..997cc81 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -302,6 +302,9 @@
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)