net: macb: Introduce gem_init_rx_ring()

[ Upstream commit 1a7124e ]

Extract the initialization code for the GEM RX ring into a new function.
This change will be utilized in a subsequent patch. No functional changes
are introduced.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260312-macb-versal-v1-1-467647173fa4@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 718d076 ("net: macb: Reinitialize tx/rx queue pointer registers and rx ring during resume")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: haokexin

drivers/net/ethernet/cadence/macb_main.c

@@ -2614,6 +2614,14 @@ static void macb_init_tieoff(struct macb *bp)
 	desc->ctrl = 0;
 }
 
+static void gem_init_rx_ring(struct macb_queue *queue)
+{
+	queue->rx_tail = 0;
+	queue->rx_prepared_head = 0;
+
+	gem_rx_refill(queue);
+}
+
 static void gem_init_rings(struct macb *bp)
 {
 	struct macb_queue *queue;
@@ -2631,10 +2639,7 @@ static void gem_init_rings(struct macb *bp)
 		queue->tx_head = 0;
 		queue->tx_tail = 0;
 
-		queue->rx_tail = 0;
-		queue->rx_prepared_head = 0;
-
-		gem_rx_refill(queue);
+		gem_init_rx_ring(queue);
 	}
 
 	macb_init_tieoff(bp);