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 db920b59a6c3332fdb771a5bcc0b0c338fce3d95..f285404cc215ad35d3c45a7946d881481159f9bd 100644 (file)
--- 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);