提交 24239aff 编写于 作者: S Sean Hefty 提交者: Linus Torvalds

[PATCH] IB: Keep MAD work completion valid

Replace the *wc field in ib_mad_recv_wc from pointing to a structure on the
stack to one allocated with the received MAD buffer.  This allows a client to
access the *wc field after their receive completion handler has returned.
Signed-off-by: NSean Hefty <sean.hefty@intel.com>
Signed-off-by: NRoland Dreier <roland@topspin.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
上级 b1ed8dab
......@@ -1600,7 +1600,8 @@ static void ib_mad_recv_done_handler(struct ib_mad_port_private *port_priv,
DMA_FROM_DEVICE);
/* Setup MAD receive work completion from "normal" work completion */
recv->header.recv_wc.wc = wc;
recv->header.wc = *wc;
recv->header.recv_wc.wc = &recv->header.wc;
recv->header.recv_wc.mad_len = sizeof(struct ib_mad);
recv->header.recv_wc.recv_buf.mad = &recv->mad.mad;
recv->header.recv_wc.recv_buf.grh = &recv->grh;
......
......@@ -69,6 +69,7 @@ struct ib_mad_list_head {
struct ib_mad_private_header {
struct ib_mad_list_head mad_list;
struct ib_mad_recv_wc recv_wc;
struct ib_wc wc;
DECLARE_PCI_UNMAP_ADDR(mapping)
} __attribute__ ((packed));
......
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