IB/mlx5: Use ARRAY_SIZE

Using the ARRAY_SIZE macro improves the readability of the code.

Found with Coccinelle with the following semantic patch:
@r depends on (org || report)@
type T;
T[] E;
position p;
@@
(
 (sizeof(E)@p /sizeof(*E))
|
 (sizeof(E)@p /sizeof(E[...]))
|
 (sizeof(E)@p /sizeof(T))
)

Signed-off-by: Jérémy Lefaure <jeremy.lefaure@lse.epita.fr>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/hw/mlx5/odp.c b/drivers/infiniband/hw/mlx5/odp.c
index 3d701c7a4c9140e488b7427d9d901a4ea77d2786..e2197bdda89c382621a74bbe20f097176b9d7faf 100644 (file)
--- a/drivers/infiniband/hw/mlx5/odp.c
+++ b/drivers/infiniband/hw/mlx5/odp.c
@@ -32,6 +32,7 @@
 
 #include <rdma/ib_umem.h>
 #include <rdma/ib_umem_odp.h>
+#include <linux/kernel.h>
 
 #include "mlx5_ib.h"
 #include "cmd.h"
@@ -929,9 +930,8 @@ static int mlx5_ib_mr_initiator_pfault_handler(
                return -EFAULT;
        }
 
-       if (unlikely(opcode >= sizeof(mlx5_ib_odp_opcode_cap) /
-           sizeof(mlx5_ib_odp_opcode_cap[0]) ||
-           !(transport_caps & mlx5_ib_odp_opcode_cap[opcode]))) {
+       if (unlikely(opcode >= ARRAY_SIZE(mlx5_ib_odp_opcode_cap) ||
+                    !(transport_caps & mlx5_ib_odp_opcode_cap[opcode]))) {
                mlx5_ib_err(dev, "ODP fault on QP of an unsupported opcode 0x%x\n",
                            opcode);
                return -EFAULT;