[PATCH net-next 3/6] net: mtk_eth_soc: hold instance lock around DMA-device-swap close

[Stanislav Fomichev <sdf.kernel@gmail.com>]

netif_close_many will soon assert ops lock (for locked DOWN/GOING_DOWN).
Update mtk_eth_set_dma_device to manually grab and release the ops lock.

Signed-off-by: Stanislav Fomichev <sdf@fomichev.me>
---
 drivers/net/ethernet/mediatek/mtk_eth_soc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 5d291e50a47b..fe7610c42e5d 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -26,6 +26,7 @@
 #include <linux/bitfield.h>
 #include <net/dsa.h>
 #include <net/dst_metadata.h>
+#include <net/netdev_lock.h>
 #include <net/page_pool/helpers.h>
 #include <linux/genalloc.h>
 
@@ -5030,10 +5031,14 @@ void mtk_eth_set_dma_device(struct mtk_eth *eth, struct device *dma_dev)
 			continue;
 
 		list_add_tail(&dev->close_list, &dev_list);
+		netdev_lock_ops(dev);
 	}
 
 	netif_close_many(&dev_list, false);
 
+	list_for_each_entry(dev, &dev_list, close_list)
+		netdev_unlock_ops(dev);
+
 	eth->dma_dev = dma_dev;
 
 	list_for_each_entry_safe(dev, tmp, &dev_list, close_list) {
-- 
2.53.0-Meta