[dpdk-dev] [PATCH v2] net/ice: ignore error when remove RSS rule

[Qi Zhang <qi.z.zhang@intel.com>]

Currently, multiple rte_flow RSS rules may map to the same
hardware rule if a later rule is just for input set change or
symm turn on/off. So after one of the rules be destroyed, we will
get error ICE_ERR_DOES_NOT_EXIST when destroying any other rules.
The patch simply fixes this by ignoring this error. A more
sophisticated fix that remember the sequence and replay properly
will be provided in the future.

Fixes: 5ad3db8d4bdd ("net/ice: enable advanced RSS")

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
---

v2:
- fix couple typo

 drivers/net/ice/ice_hash.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ice/ice_hash.c b/drivers/net/ice/ice_hash.c
index d88434305..2e9c1bc67 100644
--- a/drivers/net/ice/ice_hash.c
+++ b/drivers/net/ice/ice_hash.c
@@ -536,7 +536,12 @@ ice_hash_destroy(struct ice_adapter *ad,
 		ret = ice_rem_rss_cfg(hw, vsi->idx,
 				filter_ptr->rss_cfg.hashed_flds,
 				filter_ptr->rss_cfg.packet_hdr);
-		if (ret) {
+		/* Fixme: Ignore the error if a rule does not exist.
+		 * Currently a rule for inputset change or symm turn on/off
+		 * will overwrite an exist rule, while application still
+		 * have 2 rte_flow handles.
+		 **/
+		if (ret && ret != ICE_ERR_DOES_NOT_EXIST) {
 			rte_flow_error_set(error, EINVAL,
 					RTE_FLOW_ERROR_TYPE_HANDLE, NULL,
 					"rss flow destroy fail");
-- 
2.13.6