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

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

1 files changed, 10 insertions, 9 deletions

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 3d59f832584..417fb22ae83 100644
--- 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