[ALSA] Add error messages

Add error messages in the critial error path to be more verbose.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 11 insertions, 5 deletions

diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index 59c995bbf15b..9305ac357a3e 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -600,14 +600,18 @@ int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count)
         pstr->reg = &snd_pcm_reg[stream];
         if (substream_count > 0) {
                 err = snd_pcm_stream_proc_init(pstr);
-                if (err < 0)
+                if (err < 0) {
+                        snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n");
                         return err;
+                }
         }
         prev = NULL;
         for (idx = 0, prev = NULL; idx < substream_count; idx++) {
                 substream = kzalloc(sizeof(*substream), GFP_KERNEL);
-                if (substream == NULL)
+                if (substream == NULL) {
+                        snd_printk(KERN_ERR "Cannot allocate PCM substream\n");
                         return -ENOMEM;
+                }
                 substream->pcm = pcm;
                 substream->pstr = pstr;
                 substream->number = idx;
@@ -620,6 +624,7 @@ int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count)
                         prev->next = substream;
                 err = snd_pcm_substream_proc_init(substream);
                 if (err < 0) {
+                        snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n");
                         kfree(substream);
                         return err;
                 }
@@ -666,13 +671,14 @@ int snd_pcm_new(struct snd_card *card, char *id, int device,
         *rpcm = NULL;
         snd_assert(card != NULL, return -ENXIO);
         pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
-        if (pcm == NULL)
+        if (pcm == NULL) {
+                snd_printk(KERN_ERR "Cannot allocate PCM\n");
                 return -ENOMEM;
+        }
         pcm->card = card;
         pcm->device = device;
-        if (id) {
+        if (id)
                 strlcpy(pcm->id, id, sizeof(pcm->id));
-        }
         if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) {
                 snd_pcm_free(pcm);
                 return err;