[openib-general] [PATCH][1/6] IB: Keep MAD work completion valid

[Roland Dreier]

From: Sean Hefty <sean.hefty at intel.com>

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: Sean Hefty <sean.hefty at intel.com>
Signed-off-by: Roland Dreier <roland at topspin.com>


--- linux-export.orig/drivers/infiniband/core/mad.c	2005-03-31 19:07:01.000000000 -0800
+++ linux-export/drivers/infiniband/core/mad.c	2005-04-01 10:08:54.939957801 -0800
@@ -1600,7 +1600,8 @@
 			 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;
--- linux-export.orig/drivers/infiniband/core/mad_priv.h	2005-03-31 19:07:14.000000000 -0800
+++ linux-export/drivers/infiniband/core/mad_priv.h	2005-04-01 10:08:54.961953027 -0800
@@ -69,6 +69,7 @@
 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));