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net/mlx5: Fix possible deadlock on rule deletion

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commit b645e57debca846f51b3209907546ea857ddd3f5 upstream.

Add missing call to up_write_ref_node() which releases the semaphore
in case the FTE doesn't have destinations, such in drop rule case.

Fixes: 465e7baab6 ("net/mlx5: Fix deletion of duplicate rules")
Signed-off-by: Maor Gottlieb <maorg@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Maor Gottlieb
2022-01-24 21:25:04 +02:00
committed by Greg Kroah-Hartman
parent 1c59128955
commit 8d617110d7
1 changed files with 2 additions and 0 deletions
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2
drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
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@@ -2034,6 +2034,8 @@ void mlx5_del_flow_rules(struct mlx5_flow_handle *handle)
fte->node.del_hw_func = NULL;
up_write_ref_node(&fte->node, false);
tree_put_node(&fte->node, false);
} else {
up_write_ref_node(&fte->node, false);
}
kfree(handle);
}