wifi: iwlwifi: queue: improve warning for no skb in reclaim

We've seen this warning trigger, and while the reason is
probably obvious, I haven't been able to see it yet. Add
more information to the warning message to help identify
the cause. Also print out both index and SSN for all the
messages.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240206175739.581427dc81fc.I9a109d02b4349807dce521c693ecd3516ec58cc0@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/intel/iwlwifi/queue/tx.c

 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
 /*
- * Copyright (C) 2020-2023 Intel Corporation
+ * Copyright (C) 2020-2024 Intel Corporation
  */
 #include <net/tso.h>
 #include <linux/tcp.h>
@@ -1602,8 +1602,8 @@ void iwl_txq_reclaim(struct iwl_trans *trans, int txq_id, int ssn,
 	if (read_ptr == tfd_num)
 		goto out;
 
-	IWL_DEBUG_TX_REPLY(trans, "[Q %d] %d -> %d (%d)\n",
-			   txq_id, txq->read_ptr, tfd_num, ssn);
+	IWL_DEBUG_TX_REPLY(trans, "[Q %d] %d (%d) -> %d (%d)\n",
+			   txq_id, read_ptr, txq->read_ptr, tfd_num, ssn);
 
 	/*Since we free until index _not_ inclusive, the one before index is
 	 * the last we will free. This one must be used */
@@ -1631,7 +1631,8 @@ void iwl_txq_reclaim(struct iwl_trans *trans, int txq_id, int ssn,
 	     read_ptr = iwl_txq_get_cmd_index(txq, txq->read_ptr)) {
 		struct sk_buff *skb = txq->entries[read_ptr].skb;
 
-		if (WARN_ON_ONCE(!skb))
+		if (WARN_ONCE(!skb, "no SKB at %d (%d) on queue %d\n",
+			      read_ptr, txq->read_ptr, txq_id))
 			continue;
 
 		iwl_txq_free_tso_page(trans, skb);