wifi: rtw89: refine packet offload handling under SER

H2C of packet offload needs to wait FW ACK by C2H. But, it's possible
that packet offload happens during SER (system error recovery), e.g.
SER L2 which restarts HW. More, packet offload flow isn't deferrable.
So, the H2C wait may get `ret == 1` (unreachable).

However, the logic FW deals with packet offload is simple enough, just
clone content. It means that as long as the H2C is issued successfully,
the thing will succeed sooner or later. Therefore, after we add a debug
log when receiving ACK to packet offload, it would be acceptable that
during SER, packet offload don't really wait for ACK. And, if debugging,
we can still check its debug logs. Besides, we can expect that if we see
SER before receiving ACK to packet offload, those debug logs of the ACK
have a time difference.
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230516082441.11154-4-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/fw.c

@@ -2467,7 +2467,7 @@ int rtw89_fw_h2c_del_pkt_offload(struct rtw89_dev *rtwdev, u8 id)
 	cond = RTW89_FW_OFLD_WAIT_COND_PKT_OFLD(id, RTW89_PKT_OFLD_OP_DEL);
 
 	ret = rtw89_h2c_tx_and_wait(rtwdev, skb, wait, cond);
-	if (ret) {
+	if (ret < 0) {
 		rtw89_debug(rtwdev, RTW89_DBG_FW,
 			    "failed to del pkt ofld: id %d, ret %d\n",
 			    id, ret);
@@ -2517,7 +2517,7 @@ int rtw89_fw_h2c_add_pkt_offload(struct rtw89_dev *rtwdev, u8 *id,
 	cond = RTW89_FW_OFLD_WAIT_COND_PKT_OFLD(alloc_id, RTW89_PKT_OFLD_OP_ADD);
 
 	ret = rtw89_h2c_tx_and_wait(rtwdev, skb, wait, cond);
-	if (ret) {
+	if (ret < 0) {
 		rtw89_debug(rtwdev, RTW89_DBG_FW,
 			    "failed to add pkt ofld: id %d, ret %d\n",
 			    alloc_id, ret);

drivers/net/wireless/realtek/rtw89/mac.c

@@ -4456,6 +4456,9 @@ rtw89_mac_c2h_pkt_ofld_rsp(struct rtw89_dev *rtwdev, struct sk_buff *skb_c2h,
 	struct rtw89_completion_data data = {};
 	unsigned int cond;
 
+	rtw89_debug(rtwdev, RTW89_DBG_FW, "pkt ofld rsp: id %d op %d len %d\n",
+		    pkt_id, pkt_op, pkt_len);
+
 	data.err = !pkt_len;
 	cond = RTW89_FW_OFLD_WAIT_COND_PKT_OFLD(pkt_id, pkt_op);