Index: sys/dev/mmc/mmc.c
===================================================================
--- sys/dev/mmc/mmc.c	(revision 264141)
+++ sys/dev/mmc/mmc.c	(working copy)
@@ -769,8 +769,10 @@ mmc_test_bus_width(struct mmc_softc *sc)
 		data.data = p8;
 		data.len = 8;
 		data.flags = MMC_DATA_WRITE;
-		mmc_wait_for_cmd(sc, &cmd, 0);
-		
+		err = mmc_wait_for_cmd(sc, &cmd, 0);
+		if (err != 0)
+			device_printf(sc->dev, "BUSTEST_W err %d\n", err);
+
 		memset(&cmd, 0, sizeof(cmd));
 		memset(&data, 0, sizeof(data));
 		cmd.opcode = MMC_BUSTEST_R;
@@ -782,7 +784,12 @@ mmc_test_bus_width(struct mmc_softc *sc)
 		data.len = 8;
 		data.flags = MMC_DATA_READ;
 		err = mmc_wait_for_cmd(sc, &cmd, 0);
-		
+		if (err != 0)
+			device_printf(sc->dev, "BUSTEST_R err %d\n", err);
+
+		device_printf(sc->dev, "read %02x %02x %02x %02x %02x %02x %02x %02x\n",
+			buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], buf[7]);
+
 		mmcbr_set_bus_width(sc->dev, bus_width_1);
 		mmcbr_update_ios(sc->dev);