ALSA: hda - Avoid call of snd_jack_report at release

Don't call snd_jack_report at release of sigmatel and conexnat codecs
which results in Oops at unloading the module.

The Oops is triggered by the power-up sequence during the free due to
the pincfg restoration.  Since the power-up sequence is involved with
the unsol handling, the jack reporting may be issued during that.
The Oops occurs with this jack reporting because the jack instances
have been already released but the codec doesn't do the proper
book-keeping.

This patch adds the book-keeping of jack instances to avoid the access
to bogus pointers.

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

1 files changed, 22 insertions, 5 deletions

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 61996a2f45d..ce30b459aee 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -3851,6 +3851,15 @@ static void stac_gpio_set(struct hda_codec *codec, unsigned int mask,
                            AC_VERB_SET_GPIO_DATA, gpiostate); /* sync */
 }
 
+#ifdef CONFIG_SND_JACK
+static void stac92xx_free_jack_priv(struct snd_jack *jack)
+{
+        struct sigmatel_jack *jacks = jack->private_data;
+        jacks->nid = 0;
+        jacks->jack = NULL;
+}
+#endif
+
 static int stac92xx_add_jack(struct hda_codec *codec,
                 hda_nid_t nid, int type)
 {
@@ -3860,6 +3869,7 @@ static int stac92xx_add_jack(struct hda_codec *codec,
         int def_conf = snd_hda_codec_get_pincfg(codec, nid);
         int connectivity = get_defcfg_connect(def_conf);
         char name[32];
+        int err;
 
         if (connectivity && connectivity != AC_JACK_PORT_FIXED)
                 return 0;
@@ -3876,10 +3886,15 @@ static int stac92xx_add_jack(struct hda_codec *codec,
                 snd_hda_get_jack_connectivity(def_conf),
                 snd_hda_get_jack_location(def_conf));
 
-        return snd_jack_new(codec->bus->card, name, type, &jack->jack);
-#else
-        return 0;
+        err = snd_jack_new(codec->bus->card, name, type, &jack->jack);
+        if (err < 0) {
+                jack->nid = 0;
+                return err;
+        }
+        jack->jack->private_data = jack;
+        jack->jack->private_free = stac92xx_free_jack_priv;
 #endif
+        return 0;
 }
 
 static int stac_add_event(struct sigmatel_spec *spec, hda_nid_t nid,
@@ -4138,8 +4153,10 @@ static void stac92xx_free_jacks(struct hda_codec *codec)
         if (!codec->bus->shutdown && spec->jacks.list) {
                 struct sigmatel_jack *jacks = spec->jacks.list;
                 int i;
-                for (i = 0; i < spec->jacks.used; i++)
-                        snd_device_free(codec->bus->card, &jacks[i].jack);
+                for (i = 0; i < spec->jacks.used; i++, jacks++) {
+                        if (jacks->jack)
+                                snd_device_free(codec->bus->card, jacks->jack);
+                }
         }
         snd_array_free(&spec->jacks);
 #endif