[PATCH] ALSA: jack: fix a randconfig build issue

[Jie Yang <yang.jie@intel.com>]

There may be no input_dev for jack(e.g. phantom jack), when
CONFIG_INPUT is not selected, building errors such as:
undefined reference to `input_xxx'...

Here add #ifdef judgement to fix the issue.

Signed-off-by: Jie Yang <yang.jie@intel.com>
---
 include/sound/jack.h |  2 ++
 sound/core/jack.c    | 40 ++++++++++++++++++++++++++--------------
 2 files changed, 28 insertions(+), 14 deletions(-)

diff --git a/include/sound/jack.h b/include/sound/jack.h
index 23bede1..c1010f9 100644
--- a/include/sound/jack.h
+++ b/include/sound/jack.h
@@ -72,7 +72,9 @@ enum snd_jack_types {
 #define SND_JACK_SWITCH_TYPES 6
 
 struct snd_jack {
+#ifdef CONFIG_INPUT
 	struct input_dev *input_dev;
+#endif
 	struct list_head kctl_list;
 	struct snd_card *card;
 	int registered;
diff --git a/sound/core/jack.c b/sound/core/jack.c
index eb66327..3a1901e 100644
--- a/sound/core/jack.c
+++ b/sound/core/jack.c
@@ -32,6 +32,7 @@ struct snd_jack_kctl {
 	unsigned int mask_bits; /* only masked status bits are reported via kctl */
 };
 
+#ifdef CONFIG_INPUT
 static int jack_switch_types[SND_JACK_SWITCH_TYPES] = {
 	SW_HEADPHONE_INSERT,
 	SW_MICROPHONE_INSERT,
@@ -40,9 +41,11 @@ static int jack_switch_types[SND_JACK_SWITCH_TYPES] = {
 	SW_VIDEOOUT_INSERT,
 	SW_LINEIN_INSERT,
 };
+#endif
 
 static int snd_jack_dev_disconnect(struct snd_device *device)
 {
+#ifdef CONFIG_INPUT
 	struct snd_jack *jack = device->device_data;
 
 	if (!jack->input_dev)
@@ -54,7 +57,9 @@ static int snd_jack_dev_disconnect(struct snd_device *device)
 		input_unregister_device(jack->input_dev);
 	else
 		input_free_device(jack->input_dev);
+
 	jack->input_dev = NULL;
+#endif
 	return 0;
 }
 
@@ -83,11 +88,12 @@ static int snd_jack_dev_register(struct snd_device *device)
 {
 	struct snd_jack *jack = device->device_data;
 	struct snd_card *card = device->card;
-	int err, i;
+	int err = 0;
 
 	snprintf(jack->name, sizeof(jack->name), "%s %s",
 		 card->shortname, jack->id);
 
+#ifdef CONFIG_INPUT
 	if (!jack->input_dev)
 		return 0;
 
@@ -98,7 +104,7 @@ static int snd_jack_dev_register(struct snd_device *device)
 		jack->input_dev->dev.parent = snd_card_get_device_link(card);
 
 	/* Add capabilities for any keys that are enabled */
-	for (i = 0; i < ARRAY_SIZE(jack->key); i++) {
+	for (int i = 0; i < ARRAY_SIZE(jack->key); i++) {
 		int testbit = SND_JACK_BTN_0 >> i;
 
 		if (!(jack->type & testbit))
@@ -113,6 +119,7 @@ static int snd_jack_dev_register(struct snd_device *device)
 	err = input_register_device(jack->input_dev);
 	if (err == 0)
 		jack->registered = 1;
+#endif
 
 	return err;
 }
@@ -209,7 +216,6 @@ int snd_jack_new(struct snd_card *card, const char *id, int type,
 	struct snd_jack *jack;
 	struct snd_jack_kctl *jack_kctl = NULL;
 	int err;
-	int i;
 	static struct snd_device_ops ops = {
 		.dev_free = snd_jack_dev_free,
 		.dev_register = snd_jack_dev_register,
@@ -230,26 +236,31 @@ int snd_jack_new(struct snd_card *card, const char *id, int type,
 
 	/* don't creat input device for phantom jack */
 	if (!phantom_jack) {
+#ifdef CONFIG_INPUT
 		jack->input_dev = input_allocate_device();
 		if (jack->input_dev == NULL) {
 			err = -ENOMEM;
-			goto fail_input;
+			goto error;
 		}
 
 		jack->input_dev->phys = "ALSA";
 
-		jack->type = type;
-
-		for (i = 0; i < SND_JACK_SWITCH_TYPES; i++)
+		for (int i = 0; i < SND_JACK_SWITCH_TYPES; i++)
 			if (type & (1 << i))
 				input_set_capability(jack->input_dev, EV_SW,
 						     jack_switch_types[i]);
+#endif
+		jack->type = type;
 
 	}
 
 	err = snd_device_new(card, SNDRV_DEV_JACK, jack, &ops);
-	if (err < 0)
-		goto fail_input;
+	if (err < 0) {
+#ifdef CONFIG_INPUT
+		input_free_device(jack->input_dev);
+#endif
+		goto error;
+	}
 
 	jack->card = card;
 	INIT_LIST_HEAD(&jack->kctl_list);
@@ -261,8 +272,7 @@ int snd_jack_new(struct snd_card *card, const char *id, int type,
 
 	return 0;
 
-fail_input:
-	input_free_device(jack->input_dev);
+error:
 	kfree(jack->id);
 	kfree(jack);
 	return err;
@@ -281,11 +291,13 @@ EXPORT_SYMBOL(snd_jack_new);
  */
 void snd_jack_set_parent(struct snd_jack *jack, struct device *parent)
 {
+#ifdef CONFIG_INPUT
 	WARN_ON(jack->registered);
 	if (!jack->input_dev)
 		return;
 
 	jack->input_dev->dev.parent = parent;
+#endif
 }
 EXPORT_SYMBOL(snd_jack_set_parent);
 
@@ -340,7 +352,6 @@ EXPORT_SYMBOL(snd_jack_set_key);
 void snd_jack_report(struct snd_jack *jack, int status)
 {
 	struct snd_jack_kctl *jack_kctl;
-	int i;
 
 	if (!jack)
 		return;
@@ -349,10 +360,11 @@ void snd_jack_report(struct snd_jack *jack, int status)
 		snd_kctl_jack_report(jack->card, jack_kctl->kctl,
 					    status & jack_kctl->mask_bits);
 
+#ifdef CONFIG_INPUT
 	if (!jack->input_dev)
 		return;
 
-	for (i = 0; i < ARRAY_SIZE(jack->key); i++) {
+	for (int i = 0; i < ARRAY_SIZE(jack->key); i++) {
 		int testbit = SND_JACK_BTN_0 >> i;
 
 		if (jack->type & testbit)
@@ -369,7 +381,7 @@ void snd_jack_report(struct snd_jack *jack, int status)
 	}
 
 	input_sync(jack->input_dev);
-
+#endif
 }
 EXPORT_SYMBOL(snd_jack_report);
 
-- 
1.9.1