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Commit 24239aff authored by Sean Hefty's avatar Sean Hefty Committed by Linus Torvalds
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[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: default avatarSean Hefty <sean.hefty@intel.com>
Signed-off-by: default avatarRoland Dreier <roland@topspin.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent b1ed8dab

drivers/infiniband/core/mad.c

+2 −1
Original line number Diff line number Diff line
@@ -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;

drivers/infiniband/core/mad_priv.h

+1 −0
Original line number Diff line number Diff line
@@ -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));