ALSA: hda-intel: Cleanups for widget connection list handling

This patch adds a check to snd_hda_get_connections() routine for
presence of AC_WCAP_CONN_LIST. Also, make sure that negative error
codes from noted route are handled on all places as errors.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

3 files changed, 11 insertions, 9 deletions

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 3ecb45ddadf7..aa5540786111 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -306,6 +306,12 @@ int snd_hda_get_connections(struct hda_codec *codec, hda_nid_t nid,
         if (snd_BUG_ON(!conn_list || max_conns <= 0))
                 return -EINVAL;
 
+        if ((get_wcaps(codec, nid) & AC_WCAP_CONN_LIST) == 0) {
+                snd_printk(KERN_WARNING "hda_codec: "
+                           "connection list not available for 0x%x\n", nid);
+                return -EINVAL;
+        }
+
         parm = snd_hda_param_read(codec, nid, AC_PAR_CONNLIST_LEN);
         if (parm & AC_CLIST_LONG) {
                 /* long form */
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index b2ea43206f18..728f2a72f9b6 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -4501,12 +4501,6 @@ static int alc880_parse_auto_config(struct hda_codec *codec)
                                               &dig_nid, 1);
                 if (err < 0)
                         continue;
-                if (dig_nid > 0x7f) {
-                        printk(KERN_ERR "alc880_auto: invalid dig_nid "
-                                "connection 0x%x for NID 0x%x\n", dig_nid,
-                                spec->autocfg.dig_out_pins[i]);
-                        continue;
-                }
                 if (!i)
                         spec->multiout.dig_out_nid = dig_nid;
                 else {
diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 00c702df721c..948600dd3b90 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -3389,7 +3389,7 @@ static int stac92xx_auto_create_mono_output_ctls(struct hda_codec *codec)
                                 spec->mono_nid,
                                 con_lst,
                                 HDA_MAX_NUM_INPUTS);
-        if (!num_cons || num_cons > ARRAY_SIZE(stac92xx_mono_labels))
+        if (num_cons <= 0 || num_cons > ARRAY_SIZE(stac92xx_mono_labels))
                 return -EINVAL;
 
         for (i = 0; i < num_cons; i++) {
@@ -3535,7 +3535,7 @@ static int stac92xx_auto_create_spdif_mux_ctls(struct hda_codec *codec)
                                 spec->smux_nids[0],
                                 con_lst,
                                 HDA_MAX_NUM_INPUTS);
-        if (!num_cons)
+        if (num_cons <= 0)
                 return -EINVAL;
 
         if (!labels)
@@ -3742,7 +3742,7 @@ static int stac92xx_parse_auto_config(struct hda_codec *codec, hda_nid_t dig_out
                 if (snd_hda_get_connections(codec,
                                 spec->autocfg.mono_out_pin, conn_list, 1) &&
                                 snd_hda_get_connections(codec, conn_list[0],
-                                conn_list, 1)) {
+                                conn_list, 1) > 0) {
 
                                 int wcaps = get_wcaps(codec, conn_list[0]);
                                 int wid_type = (wcaps & AC_WCAP_TYPE)
@@ -5169,6 +5169,8 @@ again:
 
         num_dacs = snd_hda_get_connections(codec, nid,
                                 conn, STAC92HD83_DAC_COUNT + 1) - 1;
+        if (num_dacs < 0)
+                num_dacs = STAC92HD83_DAC_COUNT;
 
         /* set port X to select the last DAC
          */