[openib-general] resend [PATCH 1/2] IB/iser: don't access sc->request_buffer when sc->request_bufflen is zero

[Or Gerlitz]

Roland, there was an error in the changelog comment, here it's again.

calling sg_init_one on sc->request_buffer when sc->request_bufflen is zero is unsafe

Signed-off-by: Or Gerlitz <ogerlitz at voltaire.com>

Index: infiniband-git/drivers/infiniband/ulp/iser/iser_initiator.c
===================================================================
--- infiniband-git.orig/drivers/infiniband/ulp/iser/iser_initiator.c	2006-06-20 12:26:17.000000000 +0300
+++ infiniband-git/drivers/infiniband/ulp/iser/iser_initiator.c	2006-06-20 12:27:42.000000000 +0300
@@ -391,7 +391,8 @@
 	if (sc->use_sg) { /* using a scatter list */
 		data_buf->buf  = sc->request_buffer;
 		data_buf->size = sc->use_sg;
-	} else { /* using a single buffer - convert it into one entry SG */
+	} else if (sc->request_bufflen) {
+		/* using a single buffer - convert it into one entry SG */
 		sg_init_one(&data_buf->sg_single,
 			    sc->request_buffer, sc->request_bufflen);
 		data_buf->buf   = &data_buf->sg_single;