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| author |   Felix Fietkau <nbd@nbd.name> | 2021-09-22 16:55:48 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2021-09-23 13:14:19 +0100 |
| commit | e68daf61ed13832aef8892200a874139700ca754 (patch) | |
| tree | 7a132333e80fa09ee2e2dd02edacc5b228ae79c6 /drivers/net/ethernet/mediatek | |
| parent | nfc: st-nci: Add SPI ID matching DT compatible (diff) | |
| download | linux-dev-e68daf61ed13832aef8892200a874139700ca754.tar.xz linux-dev-e68daf61ed13832aef8892200a874139700ca754.zip | |
net: ethernet: mtk_eth_soc: avoid creating duplicate offload entries
Sometimes multiple CLS_REPLACE calls are issued for the same connection.
rhashtable_insert_fast does not check for these duplicates, so multiple
hardware flow entries can be created.
Fix this by checking for an existing entry early
Fixes: 502e84e2382d ("net: ethernet: mtk_eth_soc: add flow offloading support")
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mediatek')
| -rw-r--r-- | drivers/net/ethernet/mediatek/mtk_ppe_offload.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mediatek/mtk_ppe_offload.c b/drivers/net/ethernet/mediatek/mtk_ppe_offload.c index b5f68f66d42a..7bb1f20002b5 100644 --- a/drivers/net/ethernet/mediatek/mtk_ppe_offload.c +++ b/drivers/net/ethernet/mediatek/mtk_ppe_offload.c @@ -186,6 +186,9 @@ mtk_flow_offload_replace(struct mtk_eth *eth, struct flow_cls_offload *f) int hash; int i; + if (rhashtable_lookup(ð->flow_table, &f->cookie, mtk_flow_ht_params)) + return -EEXIST; + if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_META)) { struct flow_match_meta match; |