return -ENODEV;
        }
 
-       dev_dbg(&acm->data->dev, "%s - susp_count %d\n", __func__,
+       dev_vdbg(&acm->data->dev, "%s - susp_count %d\n", __func__,
                                                        acm->susp_count);
        usb_autopm_get_interface_async(acm->control);
        if (acm->susp_count) {
        struct acm *acm = rcv->instance;
        int status = urb->status;
 
-       dev_dbg(&acm->data->dev, "%s - status %d\n", __func__, status);
+       dev_vdbg(&acm->data->dev, "%s - status %d\n", __func__, status);
 
        if (!ACM_READY(acm)) {
                dev_dbg(&acm->data->dev, "%s - acm not ready\n", __func__);
        unsigned long flags;
        unsigned char throttled;
 
-       dev_dbg(&acm->data->dev, "%s\n", __func__);
+       dev_vdbg(&acm->data->dev, "%s\n", __func__);
 
        if (!ACM_READY(acm)) {
                dev_dbg(&acm->data->dev, "%s - acm not ready\n", __func__);
        list_del(&buf->list);
        spin_unlock_irqrestore(&acm->read_lock, flags);
 
-       dev_dbg(&acm->data->dev, "%s - processing buf 0x%p, size = %d\n",
+       dev_vdbg(&acm->data->dev, "%s - processing buf 0x%p, size = %d\n",
                                                __func__, buf, buf->size);
        if (tty) {
                spin_lock_irqsave(&acm->throttle_lock, flags);
                        return;
                } else {
                        spin_unlock_irqrestore(&acm->read_lock, flags);
-                       dev_dbg(&acm->data->dev,
+                       dev_vdbg(&acm->data->dev,
                                "%s - sending urb 0x%p, rcv 0x%p, buf 0x%p\n",
                                __func__, rcv->urb, rcv, buf);
                }
        if (!count)
                return 0;
 
-       dev_dbg(&acm->data->dev, "%s - count %d\n", __func__, count);
+       dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
 
        spin_lock_irqsave(&acm->write_lock, flags);
        wbn = acm_wb_alloc(acm);
        wb = &acm->wb[wbn];
 
        count = (count > acm->writesize) ? acm->writesize : count;
-       dev_dbg(&acm->data->dev, "%s - write %d\n", __func__, count);
+       dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
        memcpy(wb->buf, buf, count);
        wb->len = count;
        spin_unlock_irqrestore(&acm->write_lock, flags);