From e87c5e35a92e045de75fb6ae9846a38bdd0f92bd Mon Sep 17 00:00:00 2001
From: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
Date: Thu, 26 Jan 2012 19:13:21 +0200
Subject: [PATCH] lib/mpi: return error code on dividing by zero

Definitely better to return error code than to divide by zero.

Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
Reviewed-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
---
 lib/mpi/mpi-pow.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/mpi/mpi-pow.c b/lib/mpi/mpi-pow.c
index b04a3cf80080..67f3e79af914 100644
--- a/lib/mpi/mpi-pow.c
+++ b/lib/mpi/mpi-pow.c
@@ -59,7 +59,7 @@ int mpi_powm(MPI res, MPI base, MPI exp, MPI mod)
 	ep = exp->d;
 
 	if (!msize)
-		msize = 1 / msize;	/* provoke a signal */
+		return -EINVAL;
 
 	if (!esize) {
 		/* Exponent is zero, result is 1 mod MOD, i.e., 1 or 0