Index: sys/compat/linuxkpi/common/src/linux_usb.c
===================================================================
--- sys/compat/linuxkpi/common/src/linux_usb.c
+++ sys/compat/linuxkpi/common/src/linux_usb.c
@@ -707,8 +707,6 @@
 	 * 0xFFFF is a FreeBSD specific magic value.
 	 */
 	urb = usb_alloc_urb(0xFFFF, size);
-	if (urb == NULL)
-		return (-ENOMEM);
 
 	urb->dev = dev;
 	urb->endpoint = uhe;
@@ -1008,16 +1006,14 @@
 	}
 
 	urb = malloc(size, M_USBDEV, M_WAITOK | M_ZERO);
-	if (urb) {
 
-		cv_init(&urb->cv_wait, "URBWAIT");
-		if (iso_packets == 0xFFFF) {
-			urb->setup_packet = (void *)(urb + 1);
-			urb->transfer_buffer = (void *)(urb->setup_packet +
-			    sizeof(struct usb_device_request));
-		} else {
-			urb->number_of_packets = iso_packets;
-		}
+	cv_init(&urb->cv_wait, "URBWAIT");
+	if (iso_packets == 0xFFFF) {
+		urb->setup_packet = (void *)(urb + 1);
+		urb->transfer_buffer = (void *)(urb->setup_packet +
+		    sizeof(struct usb_device_request));
+	} else {
+		urb->number_of_packets = iso_packets;
 	}
 	return (urb);
 }
@@ -1722,8 +1718,6 @@
 		return (err);
 
 	urb = usb_alloc_urb(0, 0);
-	if (urb == NULL)
-		return (-ENOMEM);
 
 	usb_fill_bulk_urb(urb, udev, uhe, data, len,
 	    usb_linux_wait_complete, NULL);
Index: sys/dev/sound/usb/uaudio.c
===================================================================
--- sys/dev/sound/usb/uaudio.c
+++ sys/dev/sound/usb/uaudio.c
@@ -4968,10 +4968,6 @@
 	iot = malloc(sizeof(struct uaudio_terminal_node) * 256, M_TEMP,
 	    M_WAITOK | M_ZERO);
 
-	if (iot == NULL) {
-		DPRINTF("no memory!\n");
-		goto done;
-	}
 	while ((desc = usb_desc_foreach(cd, desc))) {
 
 		dp = desc;
Index: sys/dev/usb/input/uhid.c
===================================================================
--- sys/dev/usb/input/uhid.c
+++ sys/dev/usb/input/uhid.c
@@ -451,10 +451,6 @@
 
 	if (kern_data == NULL) {
 		kern_data = malloc(len, M_USBDEV, M_WAITOK);
-		if (kern_data == NULL) {
-			err = ENOMEM;
-			goto done;
-		}
 		free_data = 1;
 	}
 	err = usbd_req_get_report(sc->sc_udev, NULL, kern_data,
@@ -487,10 +483,6 @@
 
 	if (kern_data == NULL) {
 		kern_data = malloc(len, M_USBDEV, M_WAITOK);
-		if (kern_data == NULL) {
-			err = ENOMEM;
-			goto done;
-		}
 		free_data = 1;
 		err = copyin(user_data, kern_data, len);
 		if (err) {
Index: sys/dev/usb/input/uhid_snes.c
===================================================================
--- sys/dev/usb/input/uhid_snes.c
+++ sys/dev/usb/input/uhid_snes.c
@@ -168,10 +168,6 @@
 
 	if (kern_data == NULL) {
 		kern_data = malloc(len, M_USBDEV, M_WAITOK);
-		if (kern_data == NULL) {
-			err = ENOMEM;
-			goto done;
-		}
 		free_data = 1;
 	}
 	err = usbd_req_get_report(sc->sc_udev, NULL, kern_data,
@@ -203,10 +199,6 @@
 
 	if (kern_data == NULL) {
 		kern_data = malloc(len, M_USBDEV, M_WAITOK);
-		if (kern_data == NULL) {
-			err = ENOMEM;
-			goto done;
-		}
 		free_data = 1;
 		err = copyin(user_data, kern_data, len);
 		if (err) {
Index: sys/dev/usb/storage/ustorage_fs.c
===================================================================
--- sys/dev/usb/storage/ustorage_fs.c
+++ sys/dev/usb/storage/ustorage_fs.c
@@ -381,10 +381,6 @@
 			ustorage_fs_ramdisk =
 			    malloc(USTORAGE_FS_RAM_SECT << 9, M_USB,
 			    M_ZERO | M_WAITOK);
-
-			if (ustorage_fs_ramdisk == NULL) {
-				return (ENOMEM);
-			}
 		}
 		sc->sc_lun[0].memory_image = ustorage_fs_ramdisk;
 		sc->sc_lun[0].num_sectors = USTORAGE_FS_RAM_SECT;
Index: sys/dev/usb/usb_dev.c
===================================================================
--- sys/dev/usb/usb_dev.c
+++ sys/dev/usb/usb_dev.c
@@ -386,13 +386,11 @@
 	struct usb_fifo *f;
 
 	f = malloc(sizeof(*f), M_USBDEV, M_WAITOK | M_ZERO);
-	if (f != NULL) {
-		cv_init(&f->cv_io, "FIFO-IO");
-		cv_init(&f->cv_drain, "FIFO-DRAIN");
-		f->priv_mtx = mtx;
-		f->refcount = 1;
-		knlist_init_mtx(&f->selinfo.si_note, mtx);
-	}
+	cv_init(&f->cv_io, "FIFO-IO");
+	cv_init(&f->cv_drain, "FIFO-DRAIN");
+	f->priv_mtx = mtx;
+	f->refcount = 1;
+	knlist_init_mtx(&f->selinfo.si_note, mtx);
 	return (f);
 }
 
@@ -2309,9 +2307,6 @@
 	struct usb_symlink *ps;
 
 	ps = malloc(sizeof(*ps), M_USBDEV, M_WAITOK);
-	if (ps == NULL) {
-		return (ps);
-	}
 	/* XXX no longer needed */
 	strlcpy(ps->src_path, target, sizeof(ps->src_path));
 	ps->src_len = strlen(ps->src_path);
Index: sys/dev/usb/usb_device.c
===================================================================
--- sys/dev/usb/usb_device.c
+++ sys/dev/usb/usb_device.c
@@ -1785,9 +1785,11 @@
 		return (NULL);
 	}
 	udev = malloc(sizeof(*udev), M_USB, M_WAITOK | M_ZERO);
+#if (USB_HAVE_MALLOC_WAITOK == 0)
 	if (udev == NULL) {
 		return (NULL);
 	}
+#endif
 	/* initialise our SX-lock */
 	sx_init_flags(&udev->enum_sx, "USB config SX lock", SX_DUPOK);
 	sx_init_flags(&udev->sr_sx, "USB suspend and resume SX lock", SX_NOWITNESS);
Index: sys/dev/usb/usb_freebsd.h
===================================================================
--- sys/dev/usb/usb_freebsd.h
+++ sys/dev/usb/usb_freebsd.h
@@ -53,6 +53,7 @@
 #define	USB_HAVE_FIXED_CONFIG 0
 #define	USB_HAVE_FIXED_PORT 0
 #define	USB_HAVE_DISABLE_ENUM 1
+#define	USB_HAVE_MALLOC_WAITOK 1
 
 /* define zero ticks callout value */
 #define	USB_CALLOUT_ZERO_TICKS 1
Index: sys/dev/usb/usb_freebsd_loader.h
===================================================================
--- sys/dev/usb/usb_freebsd_loader.h
+++ sys/dev/usb/usb_freebsd_loader.h
@@ -53,6 +53,7 @@
 #define	USB_HAVE_FIXED_CONFIG 0
 #define	USB_HAVE_FIXED_PORT 0
 #define	USB_HAVE_DISABLE_ENUM 0
+#define	USB_HAVE_MALLOC_WAITOK 0
 
 #define	USB_CALLOUT_ZERO_TICKS 1
 
Index: sys/dev/usb/usb_generic.c
===================================================================
--- sys/dev/usb/usb_generic.c
+++ sys/dev/usb/usb_generic.c
@@ -2339,11 +2339,6 @@
 		}
 		f->fs_xfer = malloc(sizeof(f->fs_xfer[0]) *
 		    u.pinit->ep_index_max, M_USB, M_WAITOK | M_ZERO);
-		if (f->fs_xfer == NULL) {
-			usb_fifo_free_buffer(f);
-			error = ENOMEM;
-			break;
-		}
 		f->fs_ep_max = u.pinit->ep_index_max;
 		f->fs_ep_ptr = u.pinit->pEndpoints;
 		break;
Index: sys/dev/usb/usb_mbuf.c
===================================================================
--- sys/dev/usb/usb_mbuf.c
+++ sys/dev/usb/usb_mbuf.c
@@ -78,15 +78,10 @@
 		alloc_size = (block_size + sizeof(struct usb_mbuf)) * nblocks;
 
 		free_ptr = malloc(alloc_size, type, M_WAITOK | M_ZERO);
-
-		if (free_ptr == NULL) {
-			goto done;
-		}
 		m_ptr = free_ptr;
 		data_ptr = (void *)(m_ptr + nblocks);
 
 		while (nblocks--) {
-
 			m_ptr->cur_data_ptr =
 			    m_ptr->min_data_ptr = data_ptr;
 
@@ -99,6 +94,5 @@
 			data_ptr += block_size;
 		}
 	}
-done:
 	return (free_ptr);
 }
Index: sys/dev/usb/usb_transfer.c
===================================================================
--- sys/dev/usb/usb_transfer.c
+++ sys/dev/usb/usb_transfer.c
@@ -1342,14 +1342,15 @@
 
 		/* allocate zeroed memory */
 		buf = malloc(parm->size[0], M_USB, M_WAITOK | M_ZERO);
-
+#if (USB_HAVE_MALLOC_WAITOK == 0)
 		if (buf == NULL) {
 			parm->err = USB_ERR_NOMEM;
 			DPRINTFN(0, "cannot allocate memory block for "
 			    "configuration (%d bytes)\n",
 			    parm->size[0]);
 			goto done;
-		}
+                }
+#endif
 		parm->dma_tag_p = USB_ADD_BYTES(buf, parm->size[1]);
 		parm->dma_page_ptr = USB_ADD_BYTES(buf, parm->size[3]);
 		parm->dma_page_cache_ptr = USB_ADD_BYTES(buf, parm->size[4]);