From 5d6b0cb3369df425de75c94c98eb3f1a86659022 Mon Sep 17 00:00:00 2001 From: Denis Drozdov Date: Tue, 14 Aug 2018 14:22:35 +0300 Subject: RDMA/netdev: Fix netlink support in IPoIB IPoIB netlink support was broken by the below commit since integrating the rdma_netdev support relies on an allocation flow for netdevs that was controlled by the ipoib driver while netdev's rtnl_newlink implementation assumes that the netdev will be allocated by netlink. Such situation leads to crash in __ipoib_device_add, once trying to reuse netlink device. This patch fixes the kernel oops for both mlx4 and mlx5 devices triggered by the following command: Fixes: cd565b4b51e5 ("IB/IPoIB: Support acceleration options callbacks") Signed-off-by: Denis Drozdov Signed-off-by: Jason Gunthorpe Signed-off-by: Feras Daoud Signed-off-by: Saeed Mahameed --- drivers/infiniband/core/verbs.c | 28 +++++++++++++++++++++------- 1 file changed, 21 insertions(+), 7 deletions(-) (limited to 'drivers/infiniband/core/verbs.c') diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c index 2f34d3412097..8ec7418e99f0 100644 --- a/drivers/infiniband/core/verbs.c +++ b/drivers/infiniband/core/verbs.c @@ -2643,13 +2643,27 @@ struct net_device *rdma_alloc_netdev(struct ib_device *device, u8 port_num, if (!netdev) return ERR_PTR(-ENOMEM); - rc = params.initialize_rdma_netdev(device, port_num, netdev, - params.param); - if (rc) { - free_netdev(netdev); - return ERR_PTR(rc); - } - return netdev; } EXPORT_SYMBOL(rdma_alloc_netdev); + +int rdma_init_netdev(struct ib_device *device, u8 port_num, + enum rdma_netdev_t type, const char *name, + unsigned char name_assign_type, + void (*setup)(struct net_device *), + struct net_device *netdev) +{ + struct rdma_netdev_alloc_params params; + int rc; + + if (!device->rdma_netdev_get_params) + return -EOPNOTSUPP; + + rc = device->rdma_netdev_get_params(device, port_num, type, ¶ms); + if (rc) + return rc; + + return params.initialize_rdma_netdev(device, port_num, + netdev, params.param); +} +EXPORT_SYMBOL(rdma_init_netdev); -- cgit v1.2.3-59-g8ed1b