From: Sean Hefty 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 Signed-off-by: Roland Dreier Signed-off-by: Andrew Morton --- 25-akpm/drivers/infiniband/core/mad.c | 3 ++- 25-akpm/drivers/infiniband/core/mad_priv.h | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff -puN drivers/infiniband/core/mad.c~ib-keep-mad-work-completion-valid drivers/infiniband/core/mad.c --- 25/drivers/infiniband/core/mad.c~ib-keep-mad-work-completion-valid Fri Apr 1 13:53:33 2005 +++ 25-akpm/drivers/infiniband/core/mad.c Fri Apr 1 13:53:33 2005 @@ -1600,7 +1600,8 @@ static void ib_mad_recv_done_handler(str 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; diff -puN drivers/infiniband/core/mad_priv.h~ib-keep-mad-work-completion-valid drivers/infiniband/core/mad_priv.h --- 25/drivers/infiniband/core/mad_priv.h~ib-keep-mad-work-completion-valid Fri Apr 1 13:53:33 2005 +++ 25-akpm/drivers/infiniband/core/mad_priv.h Fri Apr 1 13:53:33 2005 @@ -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)); _