From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Tue, 12 Jul 2016 05:17:59 +0000 (+0800)
Subject: crypto: scatterwalk - Remove unnecessary BUG in scatterwalk_start
X-Git-Tag: v4.1.12-92~3^2~263
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=b96f6d584d31c7c6be03d54e3b29930e6f8f419a;p=users%2Fjedix%2Flinux-maple.git

crypto: scatterwalk - Remove unnecessary BUG in scatterwalk_start

Orabug: 25243093

Nothing bad will happen even if sg->length is zero, so there is
no point in keeping this BUG_ON in scatterwalk_start.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
(cherry picked from commit 2ee732d57496b8365819dfb958bc1ff04fcd4cac)
Signed-off-by: Ethan Zhao <ethan.zhao@oracle.com>
---

diff --git a/crypto/scatterwalk.c b/crypto/scatterwalk.c
index db920b59a6c33..f285404cc215a 100644
--- a/crypto/scatterwalk.c
+++ b/crypto/scatterwalk.c
@@ -33,9 +33,6 @@ static inline void memcpy_dir(void *buf, void *sgdata, size_t nbytes, int out)
 void scatterwalk_start(struct scatter_walk *walk, struct scatterlist *sg)
 {
 	walk->sg = sg;
-
-	BUG_ON(!sg->length);
-
 	walk->offset = sg->offset;
 }
 EXPORT_SYMBOL_GPL(scatterwalk_start);