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net: ethernet: mtk_eth_soc: fix flow block refcounting logic

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[ Upstream commit 8c1cb87c2a5c29da416848451a687473f379611c ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Felix Fietkau
2023-03-30 14:08:38 +02:00
committed by Greg Kroah-Hartman
parent 9caf3cbf12
commit 76f09582a1
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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@@ -462,6 +462,7 @@ 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;
@@ -470,7 +471,7 @@ 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);
}