[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, 1 insertions, 0 deletions

diff --git a/sound/drivers/mpu401/mpu401_uart.c b/sound/drivers/mpu401/mpu401_uart.c
index 16e87f31788c..ee67b522d259 100644
--- a/sound/drivers/mpu401/mpu401_uart.c
+++ b/sound/drivers/mpu401/mpu401_uart.c
@@ -462,6 +462,7 @@ int snd_mpu401_uart_new(struct snd_card *card, int device,
                 return err;
         mpu = kzalloc(sizeof(*mpu), GFP_KERNEL);
         if (mpu == NULL) {
+                snd_printk(KERN_ERR "mpu401_uart: cannot allocate\n");
                 snd_device_free(card, rmidi);
                 return -ENOMEM;
         }