[PATCH V3] IB/mlx5: Unify CQ create flags check

[PATCH V3] IB/mlx5: Unify CQ create flags check

[Leon Romanovsky]

From: Leon Romanovsky <leonro-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>

The create_cq() can receive creation flags which were used
differently by two commits which added create_cq extended
command and cross-channel. The merged code caused to not
accept any flags at all.

This patch unifies the check into one function and one return
error code.

Fixes: 972ecb821379 ("IB/mlx5: Add create_cq extended command")
Fixes: 051f263098a9 ("IB/mlx5: Add driver cross-channel support")
Signed-off-by: Leon Romanovsky <leonro-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>

---
Changes from v2:
  * Remove blank line after Fixes
  * Place changes below Signed-off-by
Changes from v1:
  * Remove links to linux-rdma from commit message
  * Placed change log under git comment section (---)
Changes from v0:
  * Add Fixes tag

 drivers/infiniband/hw/mlx5/cq.c      | 9 +--------
 drivers/infiniband/hw/mlx5/mlx5_ib.h | 3 ++-
 2 files changed, 3 insertions(+), 9 deletions(-)

diff --git a/drivers/infiniband/hw/mlx5/cq.c b/drivers/infiniband/hw/mlx5/cq.c
index b14316603e44..7ddc790b1819 100644
--- a/drivers/infiniband/hw/mlx5/cq.c
+++ b/drivers/infiniband/hw/mlx5/cq.c
@@ -757,10 +757,6 @@ static void destroy_cq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq)
 	mlx5_db_free(dev->mdev, &cq->db);
 }
 
-enum {
-	CQ_CREATE_FLAGS_SUPPORTED = IB_CQ_FLAGS_TIMESTAMP_COMPLETION
-};
-
 struct ib_cq *mlx5_ib_create_cq(struct ib_device *ibdev,
 				const struct ib_cq_init_attr *attr,
 				struct ib_ucontext *context,
@@ -778,13 +774,10 @@ struct ib_cq *mlx5_ib_create_cq(struct ib_device *ibdev,
 	int eqn;
 	int err;
 
-	if (check_cq_create_flags(attr->flags))
-		return ERR_PTR(-EINVAL);
-
 	if (entries < 0)
 		return ERR_PTR(-EINVAL);
 
-	if (attr->flags & ~CQ_CREATE_FLAGS_SUPPORTED)
+	if (check_cq_create_flags(attr->flags))
 		return ERR_PTR(-EOPNOTSUPP);
 
 	entries = roundup_pow_of_two(entries + 1);
diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h
index d4b227126265..fbf14a768105 100644
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -692,6 +692,7 @@ static inline u32 check_cq_create_flags(u32 flags)
 	 * It returns non-zero value for unsupported CQ
 	 * create flags, otherwise it returns zero.
 	 */
-	return (flags & ~IB_CQ_FLAGS_IGNORE_OVERRUN);
+	return (flags & ~(IB_CQ_FLAGS_IGNORE_OVERRUN |
+			  IB_CQ_FLAGS_TIMESTAMP_COMPLETION));
 }
 #endif /* MLX5_IB_H */
-- 
1.7.12.4

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