mlxsw: minimal: fix potential memory leak in mlxsw_m_linecards_init

[ Upstream commit 08fc75735fda3be97194bfbf3c899c87abb3d0fe ]

The line cards array is not freed in the error path of
mlxsw_m_linecards_init(), which can lead to a memory leak. Fix by
freeing the array in the error path, thereby making the error path
identical to mlxsw_m_linecards_fini().

Fixes: 01328e23a476 ("mlxsw: minimal: Extend module to port mapping with slot index")
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://lore.kernel.org/r/20230630012647.1078002-1-shaozhengchao@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/mellanox/mlxsw/minimal.c b/drivers/net/ethernet/mellanox/mlxsw/minimal.c
index 55b3c42..15116d9 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlxsw/minimal.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/minimal.c
@@ -430,6 +430,7 @@ static int mlxsw_m_linecards_init(struct mlxsw_m *mlxsw_m)
 err_kmalloc_array:
        for (i--; i >= 0; i--)
                kfree(mlxsw_m->line_cards[i]);
+       kfree(mlxsw_m->line_cards);
 err_kcalloc:
        kfree(mlxsw_m->ports);
        return err;