ALSA: hda - Fix NULL dereference with enable_beep=0 option

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 3d59f83..417fb22 100644 (file)
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -3779,15 +3779,16 @@ static int stac92xx_parse_auto_config(struct hda_codec *codec, hda_nid_t dig_out
                err = snd_hda_attach_beep_device(codec, nid);
                if (err < 0)
                        return err;
-               /* IDT/STAC codecs have linear beep tone parameter */
-               codec->beep->linear_tone = 1;
-               /* if no beep switch is available, make its own one */
-               caps = query_amp_caps(codec, nid, HDA_OUTPUT);
-               if (codec->beep &&
-                   !((caps & AC_AMPCAP_MUTE) >> AC_AMPCAP_MUTE_SHIFT)) {
-                       err = stac92xx_beep_switch_ctl(codec);
-                       if (err < 0)
-                               return err;
+               if (codec->beep) {
+                       /* IDT/STAC codecs have linear beep tone parameter */
+                       codec->beep->linear_tone = 1;
+                       /* if no beep switch is available, make its own one */
+                       caps = query_amp_caps(codec, nid, HDA_OUTPUT);
+                       if (!(caps & AC_AMPCAP_MUTE)) {
+                               err = stac92xx_beep_switch_ctl(codec);
+                               if (err < 0)
+                                       return err;
+                       }
                }
        }
 #endif