This is a note to let you know that I've just added the patch titled
net: ethernet: mtk_eth_soc: fix flow block refcounting logic
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-ethernet-mtk_eth_soc-fix-flow-block-refcounting-.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 2436d5657f648b33c8f50cc38bf5eff277b486c7
Author: Felix Fietkau <nbd@xxxxxxxx>
Date: Thu Mar 30 14:08:38 2023 +0200
net: ethernet: mtk_eth_soc: fix flow block refcounting logic
[ 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: 502e84e2382d ("net: ethernet: mtk_eth_soc: add flow offloading support")
Reviewed-by: Simon Horman <simon.horman@xxxxxxxxxxxx>
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Reviewed-by: Leon Romanovsky <leonro@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230330120840.52079-1-nbd@xxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/mediatek/mtk_ppe_offload.c b/drivers/net/ethernet/mediatek/mtk_ppe_offload.c
index 7bb1f20002b58..7c5403c010715 100644
--- a/drivers/net/ethernet/mediatek/mtk_ppe_offload.c
+++ b/drivers/net/ethernet/mediatek/mtk_ppe_offload.c
@@ -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);
}
