linux-kernel - [PATCH 4.16 116/196] drivers/infiniband/core/verbs.c: fix build with gcc-4.4.4

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Date:   Sun, 22 Apr 2018 15:52:16 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Bart Van Assche <bart.vanassche@....com>,
        Steve Wise <swise@...ngridcomputing.com>,
        Sagi Grimberg <sagi@...mberg.me>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Doug Ledford <dledford@...hat.com>
Subject: [PATCH 4.16 116/196] drivers/infiniband/core/verbs.c: fix build with gcc-4.4.4

4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Andrew Morton <akpm@...ux-foundation.org>

commit 6ee687735e745eafae9e6b93d1ea70bc52e7ad07 upstream.

gcc-4.4.4 has issues with initialization of anonymous unions.

drivers/infiniband/core/verbs.c: In function '__ib_drain_sq':
drivers/infiniband/core/verbs.c:2204: error: unknown field 'wr_cqe' specified in initializer
drivers/infiniband/core/verbs.c:2204: warning: initialization makes integer from pointer without a cast

Work around this.

Fixes: a1ae7d0345edd5 ("RDMA/core: Avoid that ib_drain_qp() triggers an out-of-bounds stack access")
Cc: Bart Van Assche <bart.vanassche@....com>
Cc: Steve Wise <swise@...ngridcomputing.com>
Cc: Sagi Grimberg <sagi@...mberg.me>
Cc: Jason Gunthorpe <jgg@...lanox.com>
Cc: <stable@...r.kernel.org>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Doug Ledford <dledford@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/infiniband/core/verbs.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -2197,8 +2197,9 @@ static void __ib_drain_sq(struct ib_qp *
 	struct ib_send_wr *bad_swr;
 	struct ib_rdma_wr swr = {
 		.wr = {
+			.next = NULL,
+			{ .wr_cqe	= &sdrain.cqe, },
 			.opcode	= IB_WR_RDMA_WRITE,
-			.wr_cqe	= &sdrain.cqe,
 		},
 	};
 	int ret;