From 60a6a8425a84fa46a3831ce79197640b8224311b Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Wed, 27 Jul 2011 14:01:24 +0200
Subject: ALSA: hda - Fix Oops with Realtek quirks with NULL adc_nids

Somce quirk models don't set adc_nids but let the parser filling it.
But the recent code has unnecessary NULL-checks of spec->input_mux,
and it resulted in NULL dereferences.
This patch fixes that regression.

Reported-and-tested-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 694327a..0383dd8 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -1911,7 +1911,7 @@ static int alc_build_controls(struct hda_codec *codec)
 				return err;
 		}
 	}
-	if (spec->cap_mixer) {
+	if (spec->cap_mixer && spec->adc_nids) {
 		const char *kname = kctl ? kctl->id.name : NULL;
 		for (knew = spec->cap_mixer; knew->name; knew++) {
 			if (kname && strcmp(knew->name, kname) == 0)
@@ -3677,7 +3677,7 @@ static int patch_alc880(struct hda_codec *codec)
 	if (board_config != ALC_MODEL_AUTO)
 		setup_preset(codec, &alc880_presets[board_config]);
 
-	if (!spec->no_analog && !spec->adc_nids && spec->input_mux) {
+	if (!spec->no_analog && !spec->adc_nids) {
 		alc_auto_fill_adc_caps(codec);
 		alc_rebuild_imux_for_auto_mic(codec);
 		alc_remove_invalid_adc_nids(codec);
@@ -3804,7 +3804,7 @@ static int patch_alc260(struct hda_codec *codec)
 	if (board_config != ALC_MODEL_AUTO)
 		setup_preset(codec, &alc260_presets[board_config]);
 
-	if (!spec->no_analog && !spec->adc_nids && spec->input_mux) {
+	if (!spec->no_analog && !spec->adc_nids) {
 		alc_auto_fill_adc_caps(codec);
 		alc_rebuild_imux_for_auto_mic(codec);
 		alc_remove_invalid_adc_nids(codec);
@@ -3983,7 +3983,7 @@ static int patch_alc882(struct hda_codec *codec)
 	if (board_config != ALC_MODEL_AUTO)
 		setup_preset(codec, &alc882_presets[board_config]);
 
-	if (!spec->no_analog && !spec->adc_nids && spec->input_mux) {
+	if (!spec->no_analog && !spec->adc_nids) {
 		alc_auto_fill_adc_caps(codec);
 		alc_rebuild_imux_for_auto_mic(codec);
 		alc_remove_invalid_adc_nids(codec);
@@ -4137,7 +4137,7 @@ static int patch_alc262(struct hda_codec *codec)
 	if (board_config != ALC_MODEL_AUTO)
 		setup_preset(codec, &alc262_presets[board_config]);
 
-	if (!spec->no_analog && !spec->adc_nids && spec->input_mux) {
+	if (!spec->no_analog && !spec->adc_nids) {
 		alc_auto_fill_adc_caps(codec);
 		alc_rebuild_imux_for_auto_mic(codec);
 		alc_remove_invalid_adc_nids(codec);
@@ -4293,7 +4293,7 @@ static int patch_alc268(struct hda_codec *codec)
 					  (0 << AC_AMPCAP_MUTE_SHIFT));
 	}
 
-	if (!spec->no_analog && !spec->adc_nids && spec->input_mux) {
+	if (!spec->no_analog && !spec->adc_nids) {
 		alc_auto_fill_adc_caps(codec);
 		alc_rebuild_imux_for_auto_mic(codec);
 		alc_remove_invalid_adc_nids(codec);
@@ -4705,7 +4705,7 @@ static int patch_alc269(struct hda_codec *codec)
 	if (board_config != ALC_MODEL_AUTO)
 		setup_preset(codec, &alc269_presets[board_config]);
 
-	if (!spec->no_analog && !spec->adc_nids && spec->input_mux) {
+	if (!spec->no_analog && !spec->adc_nids) {
 		alc_auto_fill_adc_caps(codec);
 		alc_rebuild_imux_for_auto_mic(codec);
 		alc_remove_invalid_adc_nids(codec);
@@ -4843,7 +4843,7 @@ static int patch_alc861(struct hda_codec *codec)
 	if (board_config != ALC_MODEL_AUTO)
 		setup_preset(codec, &alc861_presets[board_config]);
 
-	if (!spec->no_analog && !spec->adc_nids && spec->input_mux) {
+	if (!spec->no_analog && !spec->adc_nids) {
 		alc_auto_fill_adc_caps(codec);
 		alc_rebuild_imux_for_auto_mic(codec);
 		alc_remove_invalid_adc_nids(codec);
@@ -4984,7 +4984,7 @@ static int patch_alc861vd(struct hda_codec *codec)
 		add_verb(spec, alc660vd_eapd_verbs);
 	}
 
-	if (!spec->no_analog && !spec->adc_nids && spec->input_mux) {
+	if (!spec->no_analog && !spec->adc_nids) {
 		alc_auto_fill_adc_caps(codec);
 		alc_rebuild_imux_for_auto_mic(codec);
 		alc_remove_invalid_adc_nids(codec);
@@ -5200,7 +5200,7 @@ static int patch_alc662(struct hda_codec *codec)
 	if (board_config != ALC_MODEL_AUTO)
 		setup_preset(codec, &alc662_presets[board_config]);
 
-	if (!spec->no_analog && !spec->adc_nids && spec->input_mux) {
+	if (!spec->no_analog && !spec->adc_nids) {
 		alc_auto_fill_adc_caps(codec);
 		alc_rebuild_imux_for_auto_mic(codec);
 		alc_remove_invalid_adc_nids(codec);
@@ -5336,7 +5336,7 @@ static int patch_alc680(struct hda_codec *codec)
 #endif
 	}
 
-	if (!spec->no_analog && !spec->adc_nids && spec->input_mux) {
+	if (!spec->no_analog && !spec->adc_nids) {
 		alc_auto_fill_adc_caps(codec);
 		alc_rebuild_imux_for_auto_mic(codec);
 		alc_remove_invalid_adc_nids(codec);
-- 
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