bnxt_en: Refactor TX ring free logic

Add a new bnxt_hwrm_tx_ring_free() function to handle freeing a HW
transmit ring.  The new function will also be used in the next patch
to free the TX ring in queue_stop.

Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://patch.msgid.link/20250213011240.1640031-10-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: Michael Chan

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -7368,6 +7368,23 @@ static int hwrm_ring_free_send_msg(struct bnxt *bp,
 	return 0;
 }
 
+static void bnxt_hwrm_tx_ring_free(struct bnxt *bp,
+				   struct bnxt_tx_ring_info *txr,
+				   bool close_path)
+{
+	struct bnxt_ring_struct *ring = &txr->tx_ring_struct;
+	u32 cmpl_ring_id;
+
+	if (ring->fw_ring_id == INVALID_HW_RING_ID)
+		return;
+
+	cmpl_ring_id = close_path ? bnxt_cp_ring_for_tx(bp, txr) :
+		       INVALID_HW_RING_ID;
+	hwrm_ring_free_send_msg(bp, ring, RING_FREE_REQ_RING_TYPE_TX,
+				cmpl_ring_id);
+	ring->fw_ring_id = INVALID_HW_RING_ID;
+}
+
 static void bnxt_hwrm_rx_ring_free(struct bnxt *bp,
 				   struct bnxt_rx_ring_info *rxr,
 				   bool close_path)
@@ -7447,20 +7464,8 @@ static void bnxt_hwrm_ring_free(struct bnxt *bp, bool close_path)
 	if (!bp->bnapi)
 		return;
 
-	for (i = 0; i < bp->tx_nr_rings; i++) {
-		struct bnxt_tx_ring_info *txr = &bp->tx_ring[i];
-		struct bnxt_ring_struct *ring = &txr->tx_ring_struct;
-
-		if (ring->fw_ring_id != INVALID_HW_RING_ID) {
-			u32 cmpl_ring_id = bnxt_cp_ring_for_tx(bp, txr);
-
-			hwrm_ring_free_send_msg(bp, ring,
-						RING_FREE_REQ_RING_TYPE_TX,
-						close_path ? cmpl_ring_id :
-						INVALID_HW_RING_ID);
-			ring->fw_ring_id = INVALID_HW_RING_ID;
-		}
-	}
+	for (i = 0; i < bp->tx_nr_rings; i++)
+		bnxt_hwrm_tx_ring_free(bp, &bp->tx_ring[i], close_path);
 
 	bnxt_cancel_dim(bp);
 	for (i = 0; i < bp->rx_nr_rings; i++) {