net/mlx5: rate limit alloc_ent error messages

when debug a bug, which triggers TX hang, and kernel log is
spammed with the following info message

    [ 1172.044764] mlx5_core 0000:21:00.0: cmd_work_handler:930:(pid 8):
    failed to allocate command entry

Signed-off-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
index ea934cd..34cba97 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
@@ -866,7 +866,7 @@ static void cmd_work_handler(struct work_struct *work)
        if (!ent->page_queue) {
                alloc_ret = alloc_ent(cmd);
                if (alloc_ret < 0) {
-                       mlx5_core_err(dev, "failed to allocate command entry\n");
+                       mlx5_core_err_rl(dev, "failed to allocate command entry\n");
                        if (ent->callback) {
                                ent->callback(-EAGAIN, ent->context);
                                mlx5_free_cmd_msg(dev, ent->out);