From: Andrew Morton <akpm@linux-foundation.org>

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/powerpc/platforms/pseries/setup.c |    2 ++
 1 file changed, 2 insertions(+)

diff -puN arch/powerpc/platforms/pseries/setup.c~powerpc-rtas-msi-support-fix arch/powerpc/platforms/pseries/setup.c
--- a/arch/powerpc/platforms/pseries/setup.c~powerpc-rtas-msi-support-fix
+++ a/arch/powerpc/platforms/pseries/setup.c
@@ -64,6 +64,7 @@
 #include <asm/i8259.h>
 #include <asm/udbg.h>
 #include <asm/smp.h>
+#include <asm/msi.h>
 #include <asm/firmware.h>
 
 #include "plpar_wrappers.h"
@@ -237,6 +238,7 @@ static void __init pseries_discover_pic(
 			ppc_md.init_IRQ       = xics_init_IRQ;
 			setup_kexec_cpu_down_xics();
 			smp_init_pseries_xics();
+			msi_rtas_init();
 			return;
 		}
 	}
_