Commit 2ded534c authored Nov 27, 2017 by Dmitry Monakhov Committed by Greg Kroah-Hartman Feb 25, 2018

IB/core: Init subsys if compiled to vmlinuz-core




[ Upstream commit a9cd1a67 ]

Once infiniband is compiled as a core component its subsystem must be
enabled before device initialization. Otherwise there is a NULL pointer
dereference during mlx4_core init, calltrace:
->device_add
  if (dev->class) {
     deref  dev->class->p =>NULLPTR

#Config
CONFIG_NET_DEVLINK=y
CONFIG_MAY_USE_DEVLINK=y
CONFIG_MLX4_EN=y

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 1ffc1b36

drivers/infiniband/core/device.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -1261,5 +1261,5 @@ static void __exit ib_core_cleanup(void)

	MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_LS, 4);		MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_LS, 4);

	module_init(ib_core_init);		subsys_initcall(ib_core_init);
	module_exit(ib_core_cleanup);		module_exit(ib_core_cleanup);