mlxsw: Fix some IS_ERR() vs NULL bugs
commitb9d1ba5dd94009ae91aacf959801668b8ac9a2fe
authorDan Carpenter <dan.carpenter@oracle.com>
Wed, 22 Apr 2020 09:36:41 +0000 (22 12:36 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 29 Apr 2020 14:31:23 +0000 (29 16:31 +0200)
treef3bf4e24d29d9a0aadf6c2884863d2e74a224246
parentc39723ccc47d6454df44e1d1cf8af1d31abc2be4
mlxsw: Fix some IS_ERR() vs NULL bugs

[ Upstream commit c391eb8366ae052d571bb2841f1ccb4d39f3ceb8 ]

The mlxsw_sp_acl_rulei_create() function is supposed to return an error
pointer from mlxsw_afa_block_create().  The problem is that these
functions both return NULL instead of error pointers.  Half the callers
expect NULL and half expect error pointers so it could lead to a NULL
dereference on failure.

This patch changes both of them to return error pointers and changes all
the callers which checked for NULL to check for IS_ERR() instead.

Fixes: 4cda7d8d7098 ("mlxsw: core: Introduce flexible actions support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.c
drivers/net/ethernet/mellanox/mlxsw/spectrum2_acl_tcam.c
drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c
drivers/net/ethernet/mellanox/mlxsw/spectrum_mr_tcam.c