Hello Saeed Mahameed,
The patch 81848731ff40: "net/mlx5: E-Switch, Add SR-IOV (FDB)
support" from Dec 1, 2015, leads to the following static checker
warning:
drivers/net/ethernet/mellanox/mlx5/core/eswitch.c:579
esw_fdb_set_vport_rule()
warn: passing zero to 'PTR_ERR'
drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
568 esw_debug(esw->dev,
569 "\tFDB add rule dmac_v(%pM) dmac_c(%pM) ->
vport(%d)\n",
570 dmac_v, dmac_c, vport);
571 flow_rule =
572 mlx5_add_flow_rule(esw,
573 match_header,
574 match_c,
575 match_v,
576 MLX5_FLOW_CONTEXT_ACTION_FWD_DEST,
577 0, &dest);
578 if (IS_ERR_OR_NULL(flow_rule)) {
mlx5_add_flow_rule() only returns NULL on error. It never returns
ERR_PTRs.
579 pr_warn(
580 "FDB: Failed to add flow rule: dmac_v(%pM)
dmac_c(%pM) -> vport(%d), err(%ld)\n",
^^^^^^^^
It's not a terrible bug but this always says "err(0)" which is not very
useful, and it causes this static checker warning.
581 dmac_v, dmac_c, vport, PTR_ERR(flow_rule));
582 flow_rule = NULL;
583 }
584 out:
585 kfree(match_v);
586 kfree(match_c);
587 return flow_rule;
588 }
regards,
dan carpenter
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