From d54b21d824302af52d06574870817fbe14774dab Mon Sep 17 00:00:00 2001 From: David Yang Date: Mon, 26 Oct 2026 02:20:18 +0800 Subject: [PATCH] net: hisilicon: hisi_femac: Stop the receiver before releasing the RX ring hisi_femac_net_close() frees the receive ring while the RX address queue still holds every address that was pushed to IQ_ADDR. A port that keeps receiving then DMAs arrived frames into buffers that other slab caches have already taken back; on an EC6108V9C (hi3798mv100) the queue still held all 52 armed addresses right after the interface was closed, and had dropped to 43 after 15 s of broadcast traffic. Reset the port before the buffers are released, so that the receiver no longer holds any of their addresses. Fixes: 542ae60af24f ("net: hisilicon: Add Fast Ethernet MAC driver") Cc: stable@vger.kernel.org Signed-off-by: David Yang Link: https://patch.msgid.link/20261025182022.2959333-1-mmyangfl@gmail.com Signed-off-by: Jakub Kicinski --- drivers/net/ethernet/hisilicon/hisi_femac.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/hisilicon/hisi_femac.c b/drivers/net/ethernet/hisilicon/hisi_femac.c index 016605e86f0b..a44ea0a2b1ee 100644 --- a/drivers/net/ethernet/hisilicon/hisi_femac.c +++ b/drivers/net/ethernet/hisilicon/hisi_femac.c @@ -491,6 +491,7 @@ static int hisi_femac_net_close(struct net_device *dev) netif_stop_queue(dev); napi_disable(&priv->napi); + hisi_femac_port_reset(priv); hisi_femac_free_skb_rings(priv); return 0;