diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
index f701ab6..da38c32 100644
--- a/common/cmd_bootm.c
+++ b/common/cmd_bootm.c
@@ -36,6 +36,10 @@
 #include <lmb.h>
 #include <asm/byteorder.h>
 
+#if (CONFIG_COMMANDS & CFG_CMD_USB)
+#include <usb.h>
+#endif
+
 #ifdef CFG_HUSH_PARSER
 #include <hush.h>
 #endif
@@ -213,6 +217,20 @@
 	 */
 	iflag = disable_interrupts();
 
+#if (CONFIG_COMMANDS & CFG_CMD_USB)
+       /*
+        * turn off USB to prevent the host controller from writing to the
+        * SDRAM while Linux is booting. This could happen (at least for OHCI
+        * controller), because the HCCA (Host Controller Communication Area)
+        * lies within the SDRAM and the host controller writes continously to
+        * this area (as busmaster!). The HccaFrameNumber is for example
+        * updated every 1 ms within the HCCA structure in SDRAM! For more
+        * details see the OpenHCI specification.
+        */
+	usb_stop();
+#endif
+
+
 #ifdef CONFIG_AMIGAONEG3SE
 	/*
 	 * We've possible left the caches enabled during