[ALSA] Add error messages
Add error messages in the critial error path to be more verbose.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index 59c995b..9305ac3 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -600,14 +600,18 @@
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 @@
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 @@
*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;