microblaze: Clear sticky FSR register after generating exception signals

FSR is sticky, so after the userspace exception/signal generation, clear
it ready for next time.

Signed-off-by: John Williams <john.williams@petalogix.com>

diff --git a/arch/microblaze/kernel/hw_exception_handler.S b/arch/microblaze/kernel/hw_exception_handler.S
index 0ad0f70..6b0288e 100644 (file)
--- a/arch/microblaze/kernel/hw_exception_handler.S
+++ b/arch/microblaze/kernel/hw_exception_handler.S
@@ -384,6 +384,8 @@ handle_other_ex: /* Handle Other exceptions here */
        addk    r8, r17, r0; /* Load exception address */
        bralid  r15, full_exception; /* Branch to the handler */
        nop;
+       mts     r0, rfsr;       /* Clear sticky fsr */
+       nop
 
        /*
         * Trigger execution of the signal handler by enabling