[PATCH 11/25] IB/mlx4: Add implementation of clone_pd callback

[Shamir Rabinovitch <srabinov7@gmail.com>]

From: Shamir Rabinovitch <shamir.rabinovitch@oracle.com>

Copy mlx4 ib_pd to user-space.

Signed-off-by: Shamir Rabinovitch <shamir.rabinovitch@oracle.com>
Signed-off-by: Shamir Rabinovitch <srabinov7@gmail.com>
---
 drivers/infiniband/hw/mlx4/main.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index 8790101facb7..8adc569ce4fd 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -1178,6 +1178,13 @@ static int mlx4_ib_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
 	}
 }
 
+static int mlx4_ib_clone_pd(struct ib_udata *udata, struct ib_pd *ibpd)
+{
+	struct mlx4_ib_pd *pd = to_mpd(ibpd);
+
+	return udata ? ib_copy_to_udata(udata, &pd->pdn, sizeof(__u32)) : 0;
+}
+
 static int mlx4_ib_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
 {
 	struct mlx4_ib_pd *pd = to_mpd(ibpd);
@@ -1188,10 +1195,12 @@ static int mlx4_ib_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
 	if (err)
 		return err;
 
-	if (udata && ib_copy_to_udata(udata, &pd->pdn, sizeof(__u32))) {
+	err = mlx4_ib_clone_pd(udata, ibpd);
+	if (err) {
 		mlx4_pd_free(to_mdev(ibdev)->dev, pd->pdn);
 		return -EFAULT;
 	}
+
 	return 0;
 }
 
@@ -2564,6 +2573,9 @@ static const struct ib_device_ops mlx4_ib_dev_ops = {
 	.rereg_user_mr = mlx4_ib_rereg_user_mr,
 	.resize_cq = mlx4_ib_resize_cq,
 
+	/* Object sharing callbacks */
+	.clone_ib_pd = mlx4_ib_clone_pd,
+
 	INIT_RDMA_OBJ_SIZE(ib_ah, mlx4_ib_ah, ibah),
 	INIT_RDMA_OBJ_SIZE(ib_cq, mlx4_ib_cq, ibcq),
 	INIT_RDMA_OBJ_SIZE(ib_pd, mlx4_ib_pd, ibpd),
-- 
2.20.1