[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, 14 insertions, 4 deletions

diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c
index ede0a6083d29..7a86a9a08a15 100644
--- a/sound/core/rawmidi.c
+++ b/sound/core/rawmidi.c
@@ -1382,8 +1382,10 @@ static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi,
         INIT_LIST_HEAD(&stream->substreams);
         for (idx = 0; idx < count; idx++) {
                 substream = kzalloc(sizeof(*substream), GFP_KERNEL);
-                if (substream == NULL)
+                if (substream == NULL) {
+                        snd_printk(KERN_ERR "rawmidi: cannot allocate substream\n");
                         return -ENOMEM;
+                }
                 substream->stream = direction;
                 substream->number = idx;
                 substream->rmidi = rmidi;
@@ -1425,19 +1427,27 @@ int snd_rawmidi_new(struct snd_card *card, char *id, int device,
         *rrawmidi = NULL;
         snd_assert(card != NULL, return -ENXIO);
         rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL);
-        if (rmidi == NULL)
+        if (rmidi == NULL) {
+                snd_printk(KERN_ERR "rawmidi: cannot allocate\n");
                 return -ENOMEM;
+        }
         rmidi->card = card;
         rmidi->device = device;
         init_MUTEX(&rmidi->open_mutex);
         init_waitqueue_head(&rmidi->open_wait);
         if (id != NULL)
                 strlcpy(rmidi->id, id, sizeof(rmidi->id));
-        if ((err = snd_rawmidi_alloc_substreams(rmidi, &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT], SNDRV_RAWMIDI_STREAM_INPUT, input_count)) < 0) {
+        if ((err = snd_rawmidi_alloc_substreams(rmidi,
+                                                &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT],
+                                                SNDRV_RAWMIDI_STREAM_INPUT,
+                                                input_count)) < 0) {
                 snd_rawmidi_free(rmidi);
                 return err;
         }
-        if ((err = snd_rawmidi_alloc_substreams(rmidi, &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT], SNDRV_RAWMIDI_STREAM_OUTPUT, output_count)) < 0) {
+        if ((err = snd_rawmidi_alloc_substreams(rmidi,
+                                                &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT],
+                                                SNDRV_RAWMIDI_STREAM_OUTPUT,
+                                                output_count)) < 0) {
                 snd_rawmidi_free(rmidi);
                 return err;
         }