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>

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 */

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 {

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
 	 */