[openib-general] [PATCH] ib_mad.c: Better implementation of obtaining receive buffer in ib_mad_recv_done_handler

[Hal Rosenstock]

Better implementation of obtaining receive buffer in
ib_mad_recv_done_handler

Index: ib_mad.c
===================================================================
--- ib_mad.c    (revision 898)
+++ ib_mad.c    (working copy)
@@ -706,6 +707,7 @@
 static void ib_mad_recv_done_handler(struct ib_mad_port_private
*port_priv,
                                     struct ib_wc *wc)
 {
+       struct ib_mad_private_header *mad_priv_hdr;
        struct ib_mad_recv_buf *rbuf;
        struct ib_mad_private *recv;
        union ib_mad_recv_wrid wrid;
@@ -734,8 +736,8 @@
                                 struct ib_mad_recv_buf,
                                 list);
                rbuf = (struct ib_mad_recv_buf *)rbuf->list.next;
-               recv = (struct ib_mad_private *)((char *)rbuf -
-                                                sizeof(struct
ib_mad_recv_wc));
+               mad_priv_hdr = container_of(rbuf, struct
ib_mad_private_header, 
recv_buf);
+               recv = container_of(mad_priv_hdr, struct ib_mad_private,
header)
;
 
                /* Remove from posted receive MAD list */
                list_del(&recv->header.recv_buf.list);