gcc-8 notices that the memcpy in mlx5_core_query_xsrq() makes no
sense because the source and destination variables are identical:

drivers/net/ethernet/mellanox/mlx5/core/transobj.c: In function 
drivers/net/ethernet/mellanox/mlx5/core/transobj.c:347:3: error: 'memcpy' 
source argument is the same as destination [-Werror=restrict]

Either one of the pointers should be something else, or the code is
completely bogus. Removing the memcpy() won't change the behavior
but gets rid of the warning.

Fixes: 01949d0109ee ("net/mlx5_core: Enable XRCs and SRQs when using ISSI > 0")
Signed-off-by: Arnd Bergmann <a...@arndb.de>
Please review carefully, I have no idea what the author actually
intended here.
 drivers/net/ethernet/mellanox/mlx5/core/transobj.c | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/transobj.c 
index 9e38343a951f..75450f7d53bf 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/transobj.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/transobj.c
@@ -332,20 +332,12 @@ int mlx5_core_destroy_xsrq(struct mlx5_core_dev *dev, u32 
 int mlx5_core_query_xsrq(struct mlx5_core_dev *dev, u32 xsrqn, u32 *out)
        u32 in[MLX5_ST_SZ_DW(query_xrc_srq_in)] = {0};
-       void *srqc;
-       void *xrc_srqc;
        int err;
        MLX5_SET(query_xrc_srq_in, in, opcode,   MLX5_CMD_OP_QUERY_XRC_SRQ);
        MLX5_SET(query_xrc_srq_in, in, xrc_srqn, xsrqn);
        err = mlx5_cmd_exec(dev, in, sizeof(in), out,
-       if (!err) {
-               xrc_srqc = MLX5_ADDR_OF(query_xrc_srq_out, out,
-                                       xrc_srq_context_entry);
-               srqc = MLX5_ADDR_OF(query_srq_out, out, srq_context_entry);
-               memcpy(srqc, xrc_srqc, MLX5_ST_SZ_BYTES(srqc));
-       }
        return err;

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