kernel: bump 4.14 to 4.14.223
[openwrt/openwrt.git] / target / linux / mvebu / patches-4.14 / 300-mvneta-tx-queue-workaround.patch
1 The hardware queue scheduling is apparently configured with fixed
2 priorities, which creates a nasty fairness issue where traffic from one
3 CPU can starve traffic from all other CPUs.
4
5 Work around this issue by forcing all tx packets to go through one CPU,
6 until this issue is fixed properly.
7
8 Signed-off-by: Felix Fietkau <nbd@nbd.name>
9 ---
10 --- a/drivers/net/ethernet/marvell/mvneta.c
11 +++ b/drivers/net/ethernet/marvell/mvneta.c
12 @@ -3967,6 +3967,15 @@ static int mvneta_ethtool_set_wol(struct
13 return ret;
14 }
15
16 +static u16 mvneta_select_queue(struct net_device *dev, struct sk_buff *skb,
17 + void *accel_priv,
18 + select_queue_fallback_t fallback)
19 +{
20 + /* XXX: hardware queue scheduling is broken,
21 + * use only one queue until it is fixed */
22 + return 0;
23 +}
24 +
25 static const struct net_device_ops mvneta_netdev_ops = {
26 .ndo_open = mvneta_open,
27 .ndo_stop = mvneta_stop,
28 @@ -3977,6 +3986,7 @@ static const struct net_device_ops mvnet
29 .ndo_fix_features = mvneta_fix_features,
30 .ndo_get_stats64 = mvneta_get_stats64,
31 .ndo_do_ioctl = mvneta_ioctl,
32 + .ndo_select_queue = mvneta_select_queue,
33 };
34
35 static const struct ethtool_ops mvneta_eth_tool_ops = {