Re: [dpdk-dev] [PATCH 28/52] net/ice/base: return correct error code

["Patil, Kiran" <kiran.patil@intel.com>]

ACK

-----Original Message-----
From: Zhang, Qi Z <qi.z.zhang@intel.com> 
Sent: Tuesday, June 2, 2020 7:40 PM
To: Yang, Qiming <qiming.yang@intel.com>
Cc: dev@dpdk.org; Ye, Xiaolong <xiaolong.ye@intel.com>; Zhang, Qi Z <qi.z.zhang@intel.com>; Patil, Kiran <kiran.patil@intel.com>; Stillwell Jr, Paul M <paul.m.stillwell.jr@intel.com>
Subject: [PATCH 28/52] net/ice/base: return correct error code

Return ICE_ERR_DOES_NOT_EXIST return code if admin command error code is ICE_AQ_RC_ENOENT (not exist). ice_aq_sw_rules is used when switch rule is getting added/deleted/updated. In case of delete/update switch rule, admin command can return ICE_AQ_RC_ENOENT error code if such rule does not exist, hence return ICE_ERR_DOES_NOT_EXIST error code from ice_aq_sw_rule, so that caller of this fucnction can decide how to handle ICE_ERR_DOES_NOT_EXIST.

Allow proper cleanup of internal data structures from ice_rem_adv_rule function if ice_aq_sw_rules return error code ICE_ERR_DOES_NOT_EXIST otherwise per recipe:rule list will never become empty.

Signed-off-by: Kiran Patil <kiran.patil@intel.com>
Signed-off-by: Paul M. Stillwell Jr <paul.m.stillwell.jr@intel.com>
Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
---
 drivers/net/ice/base/ice_switch.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ice/base/ice_switch.c b/drivers/net/ice/base/ice_switch.c
index 6387f9b84..fa3a59e51 100644
--- a/drivers/net/ice/base/ice_switch.c
+++ b/drivers/net/ice/base/ice_switch.c
@@ -1868,6 +1868,7 @@ ice_aq_sw_rules(struct ice_hw *hw, void *rule_list, u16 rule_list_sz,
 		u8 num_rules, enum ice_adminq_opc opc, struct ice_sq_cd *cd)  {
 	struct ice_aq_desc desc;
+	enum ice_status status;
 
 	ice_debug(hw, ICE_DBG_TRACE, "%s\n", __func__);
 
@@ -1881,7 +1882,12 @@ ice_aq_sw_rules(struct ice_hw *hw, void *rule_list, u16 rule_list_sz,
 	desc.flags |= CPU_TO_LE16(ICE_AQ_FLAG_RD);
 	desc.params.sw_rules.num_rules_fltr_entry_index =
 		CPU_TO_LE16(num_rules);
-	return ice_aq_send_cmd(hw, &desc, rule_list, rule_list_sz, cd);
+	status = ice_aq_send_cmd(hw, &desc, rule_list, rule_list_sz, cd);
+	if (opc != ice_aqc_opc_add_sw_rules &&
+	    hw->adminq.sq_last_status == ICE_AQ_RC_ENOENT)
+		status = ICE_ERR_DOES_NOT_EXIST;
+
+	return status;
 }
 
 /**
@@ -7354,7 +7360,7 @@ ice_rem_adv_rule(struct ice_hw *hw, struct ice_adv_lkup_elem *lkups,
 		status = ice_aq_sw_rules(hw, (struct ice_aqc_sw_rules *)s_rule,
 					 rule_buf_sz, 1,
 					 ice_aqc_opc_remove_sw_rules, NULL);
-		if (status == ICE_SUCCESS) {
+		if (status == ICE_SUCCESS || status == ICE_ERR_DOES_NOT_EXIST) {
 			ice_acquire_lock(rule_lock);
 			LIST_DEL(&list_elem->list_entry);
 			ice_free(hw, list_elem->lkups);
--
2.13.6