[PATCH v8] doc: add PMD known issue

[Mingjin Ye]

Add a known issue: Rx path dynamic change is not supported for PMD.

Fixes: de853a3bb151 ("net/ice: disable DDP package on Windows")
Cc: stable at dpdk.org

Signed-off-by: Mingjin Ye <mingjinx.ye at intel.com>
---
 doc/guides/nics/ice.rst | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/doc/guides/nics/ice.rst b/doc/guides/nics/ice.rst
index ce075e067c..115625523e 100644
--- a/doc/guides/nics/ice.rst
+++ b/doc/guides/nics/ice.rst
@@ -395,3 +395,15 @@ file is used by both the kernel driver and the DPDK PMD.
 
       Windows support: The DDP package is not supported on Windows so,
       loading of the package is disabled on Windows.
+
+ice: Rx path does not support dynamic change
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The ice driver supports fast and offload rx path. When pmd is initialized,
+the fast rx path is selected by default. Even if offload is subsequently
+enabled through the API, which will not work because the past rx path is
+still used.
+
+The ice driver does not support to change the rx path after application
+is initialized. If HW offload is required, the ``--rx-offloads`` parameter
+should be used to choose the offload Rx path by default.
-- 
2.34.1