[dpdk-dev] [PATCH] doc: fix MAC address rewrite actions documentation

[Dekel Peled <dekelp@mellanox.com>]

This patch fixes a typo in SET_MAC_DST action description.
It also adds restriction note for set MAC src/dst actions description.

Fixes: 15dbcdaada77 ("ethdev: add generic MAC address rewrite actions")
Cc: jackmin@mellanox.com

Signed-off-by: Dekel Peled <dekelp@mellanox.com>
---
 doc/guides/prog_guide/rte_flow.rst | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/doc/guides/prog_guide/rte_flow.rst b/doc/guides/prog_guide/rte_flow.rst
index c186375..df1ac2f 100644
--- a/doc/guides/prog_guide/rte_flow.rst
+++ b/doc/guides/prog_guide/rte_flow.rst
@@ -2314,7 +2314,10 @@ in pattern, Some PMDs will reject rule because behaviour will be undefined.
 Action: ``SET_MAC_SRC``
 ^^^^^^^^^^^^^^^^^^^^^^^
 
-Set source MAC address
+Set source MAC address in the outermost Ethernet header.
+
+It must be used with a valid RTE_FLOW_ITEM_TYPE_ETH flow pattern item.
+Otherwise, RTE_FLOW_ERROR_TYPE_ACTION error will be returned.
 
 .. _table_rte_flow_action_set_mac_src:
 
@@ -2329,7 +2332,10 @@ Set source MAC address
 Action: ``SET_MAC_DST``
 ^^^^^^^^^^^^^^^^^^^^^^^
 
-Set source MAC address
+Set destination MAC address in the outermost Ethernet header.
+
+It must be used with a valid RTE_FLOW_ITEM_TYPE_ETH flow pattern item.
+Otherwise, RTE_FLOW_ERROR_TYPE_ACTION error will be returned.
 
 .. _table_rte_flow_action_set_mac_dst:
 
-- 
1.8.3.1