diff --git a/arch/arm/mach-omap2/mux.c b/arch/arm/mach-omap2/mux.c
index 65c3391..3268ee2 100644
--- a/arch/arm/mach-omap2/mux.c
+++ b/arch/arm/mach-omap2/mux.c
@@ -247,7 +247,7 @@
 	int mux_mode;
 
 	mux_mode = omap_mux_get_by_name(muxname, &partition, &mux);
-	if (mux_mode < 0)
+	if (mux_mode < 0 || !mux)
 		return mux_mode;
 
 	old_mode = omap_mux_read(partition, mux->reg_offset);