microblaze: fix interrupt state restore

Interrupts must be disabled while an interrupt state restore
(prep for interrupt return) is in progress.
Code to do this was lost in the port to the mainline kernel.

Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>

1 files changed, 6 insertions, 4 deletions

diff --git a/arch/microblaze/kernel/entry-nommu.S b/arch/microblaze/kernel/entry-nommu.S
index 95b0855802df..391d6197fc3b 100644
--- a/arch/microblaze/kernel/entry-nommu.S
+++ b/arch/microblaze/kernel/entry-nommu.S
@@ -122,7 +122,7 @@ ENTRY(_interrupt)
 
 ret_from_intr:
         lwi     r11, r1, PT_MODE
-        bneid   r11, 3f
+        bneid   r11, no_intr_resched
 
         lwi     r6, r31, TS_THREAD_INFO /* get thread info */
         lwi     r19, r6, TI_FLAGS       /* get flags in thread info */
@@ -133,16 +133,18 @@ ret_from_intr:
         bralid  r15, schedule
         nop
 1:      andi    r11, r19, _TIF_SIGPENDING
-        beqid   r11, no_intr_reshed
+        beqid   r11, no_intr_resched
         addk    r5, r1, r0
         addk    r7, r0, r0
         bralid  r15, do_signal
         addk    r6, r0, r0
 
-no_intr_reshed:
+no_intr_resched:
+        /* Disable interrupts, we are now committed to the state restore */
+        disable_irq
+
         /* save mode indicator */
         lwi     r11, r1, PT_MODE
-3:
         swi     r11, r0, PER_CPU(KM)
 
         /* save r31 */