Re: [PATCH] add Steinberg UR44 USB Audio Interface support to quirks-table

[Clemens Ladisch <clemens@ladisch.de>]

(Sorry for the delay.)

Cyrus Harmon wrote:
> [    2.978159] snd-usb-audio 3-3.2:1.1: probe step 2
> [    2.978334] snd-usb-audio 3-3.2:1.1: probe failed

Still mysterious.  Please try with this patch instead.


Regards,
Clemens


--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -1086,6 +1086,7 @@ static int snd_pcm_dev_register(struct snd_device *device)
 	mutex_lock(&register_mutex);
 	err = snd_pcm_add(pcm);
 	if (err) {
+		printk(KERN_ERR "snd_pcm_add(%d) failed\n", pcm->device);
 		mutex_unlock(&register_mutex);
 		return err;
 	}
@@ -1115,6 +1116,7 @@ static int snd_pcm_dev_register(struct snd_device *device)
 						  &snd_pcm_f_ops[cidx],
 						  pcm, str, dev);
 		if (err < 0) {
+			dev_err(dev, "snd_register_device_for_dev failed: %d\n", err);
 			list_del(&pcm->list);
 			mutex_unlock(&register_mutex);
 			return err;