sound: Revert "ALSA: Fix limit of 8 PCM devices in SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE"

This reverts commit fb3d6f2b77bdec75d45aa9d4464287ed87927866.

New, updated patch with same subject replaces this commit.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 13 insertions, 37 deletions

diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index 24271a3bd901..ece25c718e95 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -42,7 +42,7 @@ static int snd_pcm_dev_free(struct snd_device *device);
 static int snd_pcm_dev_register(struct snd_device *device);
 static int snd_pcm_dev_disconnect(struct snd_device *device);
 
-static inline struct snd_pcm *snd_pcm_get(struct snd_card *card, int device)
+static struct snd_pcm *snd_pcm_search(struct snd_card *card, int device)
 {
 	struct snd_pcm *pcm;
 
@@ -53,37 +53,6 @@ static inline struct snd_pcm *snd_pcm_get(struct snd_card *card, int device)
 	return NULL;
 }
 
-static inline int snd_pcm_next(struct snd_card *card, int device)
-{
-	struct snd_pcm *pcm;
-
-	list_for_each_entry(pcm, &snd_pcm_devices, list) {
-		if (pcm->card == card && pcm->device > device)
-			return pcm->device;
-		else if (pcm->card->number > card->number)
-			return -1;
-	}
-	return -1;
-}
-
-static inline int snd_pcm_add(struct snd_pcm *newpcm)
-{
-	struct snd_pcm *pcm;
-
-	list_for_each_entry(pcm, &snd_pcm_devices, list) {
-		if (pcm->card == newpcm->card && pcm->device == newpcm->device)
-			return -EBUSY;
-		if (pcm->card->number > newpcm->card->number ||
-				(pcm->card == newpcm->card &&
-				pcm->device > newpcm->device)) {
-			list_add(&newpcm->list, pcm->list.prev);
-			return 0;
-		}
-	}
-	list_add_tail(&newpcm->list, &snd_pcm_devices);
-	return 0;
-}
-
 static int snd_pcm_control_ioctl(struct snd_card *card,
 				 struct snd_ctl_file *control,
 				 unsigned int cmd, unsigned long arg)
@@ -96,7 +65,14 @@ static int snd_pcm_control_ioctl(struct snd_card *card,
 			if (get_user(device, (int __user *)arg))
 				return -EFAULT;
 			mutex_lock(&register_mutex);
-			device = snd_pcm_next(card, device);
+			device = device < 0 ? 0 : device + 1;
+			while (device < SNDRV_PCM_DEVICES) {
+				if (snd_pcm_search(card, device))
+					break;
+				device++;
+			}
+			if (device == SNDRV_PCM_DEVICES)
+				device = -1;
 			mutex_unlock(&register_mutex);
 			if (put_user(device, (int __user *)arg))
 				return -EFAULT;
@@ -122,7 +98,7 @@ static int snd_pcm_control_ioctl(struct snd_card *card,
 			if (get_user(subdevice, &info->subdevice))
 				return -EFAULT;
 			mutex_lock(&register_mutex);
-			pcm = snd_pcm_get(card, device);
+			pcm = snd_pcm_search(card, device);
 			if (pcm == NULL) {
 				err = -ENXIO;
 				goto _error;
@@ -955,11 +931,11 @@ static int snd_pcm_dev_register(struct snd_device *device)
 
 	snd_assert(pcm != NULL && device != NULL, return -ENXIO);
 	mutex_lock(&register_mutex);
-	err = snd_pcm_add(pcm);
-	if (err) {
+	if (snd_pcm_search(pcm->card, pcm->device)) {
 		mutex_unlock(&register_mutex);
-		return err;
+		return -EBUSY;
 	}
+	list_add_tail(&pcm->list, &snd_pcm_devices);
 	for (cidx = 0; cidx < 2; cidx++) {
 		int devtype = -1;
 		if (pcm->streams[cidx].substream == NULL)