iwlwifi: pcie: clean up some rx code

We don't need the sequence/index/cmd_index unless we're doing
reclaim, they're not even valid in the other cases. Move the
variables and their assignments into the right if statement
and combine the two if statements into a single one as well.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20201209231352.6207fdcc91a9.Ia71e766ead7560262f4bc6ad3da6f1117c498cd6@changeidSigned-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/pcie/rx.c

@@ -1239,9 +1239,8 @@ static void iwl_pcie_rx_handle_rb(struct iwl_trans *trans,
 
 	while (offset + sizeof(u32) + sizeof(struct iwl_cmd_header) < max_len) {
 		struct iwl_rx_packet *pkt;
-		u16 sequence;
 		bool reclaim;
-		int index, cmd_index, len;
+		int len;
 		struct iwl_rx_cmd_buffer rxcb = {
 			._offset = rxb->offset + offset,
 			._rx_page_order = trans_pcie->rx_page_order,
@@ -1307,10 +1306,6 @@ static void iwl_pcie_rx_handle_rb(struct iwl_trans *trans,
 			}
 		}
 
-		sequence = le16_to_cpu(pkt->hdr.sequence);
-		index = SEQ_TO_INDEX(sequence);
-		cmd_index = iwl_txq_get_cmd_index(txq, index);
-
 		if (rxq->id == trans_pcie->def_rx_queue)
 			iwl_op_mode_rx(trans->op_mode, &rxq->napi,
 				       &rxcb);
@@ -1318,17 +1313,19 @@ static void iwl_pcie_rx_handle_rb(struct iwl_trans *trans,
 			iwl_op_mode_rx_rss(trans->op_mode, &rxq->napi,
 					   &rxcb, rxq->id);
 
-		if (reclaim) {
-			kfree_sensitive(txq->entries[cmd_index].free_buf);
-			txq->entries[cmd_index].free_buf = NULL;
-		}
-
 		/*
 		 * After here, we should always check rxcb._page_stolen,
 		 * if it is true then one of the handlers took the page.
 		 */
 
 		if (reclaim) {
+			u16 sequence = le16_to_cpu(pkt->hdr.sequence);
+			int index = SEQ_TO_INDEX(sequence);
+			int cmd_index = iwl_txq_get_cmd_index(txq, index);
+
+			kfree_sensitive(txq->entries[cmd_index].free_buf);
+			txq->entries[cmd_index].free_buf = NULL;
+
 			/* Invoke any callbacks, transfer the buffer to caller,
 			 * and fire off the (possibly) blocking
 			 * iwl_trans_send_cmd()