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net: ethernet: mtk_eth_soc: fix flow block refcounting logic

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Since we call flow_block_cb_decref on FLOW_BLOCK_UNBIND, we also need to
call flow_block_cb_incref for a newly allocated cb.
Also fix the accidentally inverted refcount check on unbind.

Fixes: 502e84e238 ("net: ethernet: mtk_eth_soc: add flow offloading support")
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://lore.kernel.org/r/20230330120840.52079-1-nbd@nbd.name
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Felix Fietkau 2023-03-30 14:08:38 +02:00 committed by Jakub Kicinski
parent 2960a2d33b
commit 8c1cb87c2a
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ethernet/mediatek/mtk_ppe_offload.c
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@ -576,6 +576,7 @@ mtk_eth_setup_tc_block(struct net_device *dev, struct flow_block_offload *f)
if (IS_ERR(block_cb))
return PTR_ERR(block_cb);
flow_block_cb_incref(block_cb);
flow_block_cb_add(block_cb, f);
list_add_tail(&block_cb->driver_list, &block_cb_list);
return 0;
@ -584,7 +585,7 @@ mtk_eth_setup_tc_block(struct net_device *dev, struct flow_block_offload *f)
if (!block_cb)
return -ENOENT;
if (flow_block_cb_decref(block_cb)) {
if (!flow_block_cb_decref(block_cb)) {
flow_block_cb_remove(block_cb, f);
list_del(&block_cb->driver_list);
}