ALSA: Return proper error code at probe in sound/usb/*

Some drivers in soudn/usb/* don't handle the error code properly
from snd_card_create().  This patch fixes these places.

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

1 files changed, 8 insertions, 7 deletions

diff --git a/sound/usb/caiaq/caiaq-device.c b/sound/usb/caiaq/caiaq-device.c
index 63a2c1d5779b..55a9075cb097 100644
--- a/sound/usb/caiaq/caiaq-device.c
+++ b/sound/usb/caiaq/caiaq-device.c
@@ -336,7 +336,7 @@ static void __devinit setup_card(struct snd_usb_caiaqdev *dev)
                 log("Unable to set up control system (ret=%d)\n", ret);
 }
 
-static struct snd_card* create_card(struct usb_device* usb_dev)
+static int create_card(struct usb_device* usb_dev, struct snd_card **cardp)
 {
         int devnum;
         int err;
@@ -348,12 +348,12 @@ static struct snd_card* create_card(struct usb_device* usb_dev)
                         break;
 
         if (devnum >= SNDRV_CARDS)
-                return NULL;
+                return -ENODEV;
 
         err = snd_card_create(index[devnum], id[devnum], THIS_MODULE, 
                               sizeof(struct snd_usb_caiaqdev), &card);
         if (err < 0)
-                return NULL;
+                return err;
 
         dev = caiaqdev(card);
         dev->chip.dev = usb_dev;
@@ -363,7 +363,8 @@ static struct snd_card* create_card(struct usb_device* usb_dev)
         spin_lock_init(&dev->spinlock);
         snd_card_set_dev(card, &usb_dev->dev);
 
-        return card;
+        *cardp = card;
+        return 0;
 }
 
 static int __devinit init_card(struct snd_usb_caiaqdev *dev)
@@ -442,10 +443,10 @@ static int __devinit snd_probe(struct usb_interface *intf,
         struct snd_card *card;
         struct usb_device *device = interface_to_usbdev(intf);
         
-        card = create_card(device);
+        ret = create_card(device, &card);
         
-        if (!card)
-                return -ENOMEM;
+        if (ret < 0)
+                return ret;
                         
         usb_set_intfdata(intf, card);
         ret = init_card(caiaqdev(card));