diff options
| author | Esben Haabendal <esben@geanix.com> | 2021-06-18 12:52:38 +0200 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2021-06-30 08:47:50 -0400 |
| commit | 76c10e10ba7b5290978edb9a32419549686c41ef (patch) | |
| tree | f066513bc97c32a67ebe984ceb9b5c82eb02d034 | |
| parent | aa00b97804826de80b9f774f59f36d68a9723e58 (diff) | |
net: ll_temac: Avoid ndo_start_xmit returning NETDEV_TX_BUSY
[ Upstream commit f6396341194234e9b01cd7538bc2c6ac4501ab14 ]
As documented in Documentation/networking/driver.rst, the ndo_start_xmit
method must not return NETDEV_TX_BUSY under any normal circumstances, and
as recommended, we simply stop the tx queue in advance, when there is a
risk that the next xmit would cause a NETDEV_TX_BUSY return.
Signed-off-by: Esben Haabendal <esben@geanix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/xilinx/ll_temac_main.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/ethernet/xilinx/ll_temac_main.c b/drivers/net/ethernet/xilinx/ll_temac_main.c index d3d9f7046913..9a7af7dda70d 100644 --- a/drivers/net/ethernet/xilinx/ll_temac_main.c +++ b/drivers/net/ethernet/xilinx/ll_temac_main.c @@ -939,6 +939,11 @@ temac_start_xmit(struct sk_buff *skb, struct net_device *ndev) wmb(); lp->dma_out(lp, TX_TAILDESC_PTR, tail_p); /* DMA start */ + if (temac_check_tx_bd_space(lp, MAX_SKB_FRAGS + 1)) { + netdev_info(ndev, "%s -> netif_stop_queue\n", __func__); + netif_stop_queue(ndev); + } + return NETDEV_TX_OK; } |