[Blackfin] arch: In the double fault handler, set up the PT_RETI slot

In the double fault handler, set up the PT_RETI slot so that
we print out the correct return address in the dumping code.

Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S
index f2fb87e9a46e..7365a17a6a81 100644
--- a/arch/blackfin/mach-common/entry.S
+++ b/arch/blackfin/mach-common/entry.S
@@ -295,6 +295,11 @@ ENTRY(_double_fault)
          */
         SAVE_ALL_SYS
 
+        /* The dumping functions expect the return address in the RETI
+         * slot.  */
+        r6 = retx;
+        [sp + PT_PC] = r6;
+
         r0 = sp;        /* stack frame pt_regs pointer argument ==> r0 */
         SP += -12;
         call _double_fault_c;