math-emu: Fix thinko in _FP_DIV

In commit 48d6c64311ddb6417b901639530ccbc47bdc7635 ("math-emu: Add
support for reporting exact invalid exception") code was added to
set the new FP_EX_INVALID_{IDI,ZDZ} exception flag bits.

However there is a missing break statement for the
_FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_INF) switch case, the
code just falls into _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_ZERO)
which then proceeds to overwrite all of the settings.

Fix by adding the missing break.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/math-emu/op-common.h b/include/math-emu/op-common.h
index bc50aa0d6d73..f456534dcaf9 100644
--- a/include/math-emu/op-common.h
+++ b/include/math-emu/op-common.h
@@ -503,6 +503,8 @@ do {							\
     R##_c = FP_CLS_NAN;                                 \
     _FP_FRAC_SET_##wc(R, _FP_NANFRAC_##fs);             \
     FP_SET_EXCEPTION(FP_EX_INVALID | FP_EX_INVALID_IDI);\
+    break;                                              \
+                                                        \
   case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_ZERO):        \
     R##_s = _FP_NANSIGN_##fs;                           \
     R##_c = FP_CLS_NAN;                                 \