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net: hisilicon: hisi_femac: Stop the receiver before releasing the RX ring

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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: 542ae60af2 ("net: hisilicon: Add Fast Ethernet MAC driver")
Cc: stable@vger.kernel.org
Signed-off-by: David Yang <mmyangfl@gmail.com>
Link: https://patch.msgid.link/20261025182022.2959333-1-mmyangfl@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
David Yang 2026-10-26 02:20:18 +08:00 committed by Jakub Kicinski
parent 947ccedf68
commit d54b21d824
1 changed files with 1 additions and 0 deletions
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1
drivers/net/ethernet/hisilicon/hisi_femac.c
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@ -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;