ALSA: hda/jack - Fix NULL-dereference at probing

At probing time, the elements that aren't assigned to kctl or jack may
be called.  Need proper NULL-checks.

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

diff --git a/sound/pci/hda/hda_jack.c b/sound/pci/hda/hda_jack.c
index eac002d..ef36cbb 100644 (file)
--- a/sound/pci/hda/hda_jack.c
+++ b/sound/pci/hda/hda_jack.c
@@ -194,6 +194,8 @@ void snd_hda_jack_report_sync(struct hda_codec *codec)
        for (i = 0; i < codec->jacktbl.used; i++, jack++)
                if (jack->nid) {
                        jack_detect_update(codec, jack);
+                       if (!jack->kctl)
+                               continue;
                        state = get_jack_plug_state(jack->pin_sense);
                        snd_kctl_jack_report(codec->bus->card, jack->kctl, state);
                }
@@ -356,7 +358,7 @@ void snd_hda_input_jack_report(struct hda_codec *codec, hda_nid_t nid)
        unsigned int present;
        int type;
 
-       if (!jack)
+       if (!jack || !jack->jack)
                return;
 
        present = snd_hda_jack_detect(codec, nid);