net: stmmac: ensure tx function is not running in stmmac_xdp_release()

[ Upstream commit 77711683a50477de39757d67ab1a3638220d6860 ]

When stmmac_xdp_release() is called, there is a possibility that tx
function is still running on other queues which will lead to tx queue
timed out and reset adapter.

This commit ensure that tx function is not running xdp before release
flow continue to run.

Fixes: ac746c8520d9 ("net: stmmac: enhance XDP ZC driver level switching performance")
Signed-off-by: Song Yoong Siang <yoong.siang.song@intel.com>
Signed-off-by: Mohd Faizal Abdul Rahim <faizal.abdul.rahim@intel.com>
Signed-off-by: Noor Azura Ahmad Tarmizi <noor.azura.ahmad.tarmizi@intel.com>
Link: https://lore.kernel.org/r/20221110064552.22504-1-noor.azura.ahmad.tarmizi@linux.intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 6f579f49899343fc55c326986a750460f7b6f203..8590249d4468f2b4b7f723a09e25db383e136a0e 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -6494,6 +6494,9 @@ void stmmac_xdp_release(struct net_device *dev)
        struct stmmac_priv *priv = netdev_priv(dev);
        u32 chan;
 
+       /* Ensure tx function is not running */
+       netif_tx_disable(dev);
+
        /* Disable NAPI process */
        stmmac_disable_all_queues(priv);