diff --git a/sys/compat/linuxkpi/common/src/linux_pci.c b/sys/compat/linuxkpi/common/src/linux_pci.c
--- a/sys/compat/linuxkpi/common/src/linux_pci.c
+++ b/sys/compat/linuxkpi/common/src/linux_pci.c
@@ -1471,14 +1471,19 @@
 	}
 
 	nseg = -1;
-	if (_bus_dmamap_load_phys(obj->dmat, obj->dmamap, phys, len,
-	    BUS_DMA_NOWAIT, &seg, &nseg) != 0) {
+	error = _bus_dmamap_load_phys(obj->dmat, obj->dmamap, phys, len,
+	    BUS_DMA_NOWAIT, &seg, &nseg);
+	if (error != 0) {
 		bus_dmamap_destroy(obj->dmat, obj->dmamap);
 		DMA_PRIV_UNLOCK(priv);
 		uma_zfree(linux_dma_obj_zone, obj);
 		counter_u64_add(lkpi_pci_nseg1_fail, 1);
-		if (linuxkpi_debug)
+		if (linuxkpi_debug) {
+			device_printf(dev->bsddev, "%s: _bus_dmamap_load_phys "
+			    "error %d, phys %#018jx len %zu\n", __func__,
+			    error, (uintmax_t)phys, len);
 			dump_stack();
+		}
 		return (0);
 	}