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RDMA/netdev: Fix netlink support in IPoIB

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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: cd565b4b51 ("IB/IPoIB: Support acceleration options callbacks")
Signed-off-by: Denis Drozdov <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>
Signed-off-by: Feras Daoud <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>
This commit is contained in:
Denis Drozdov 2018-08-14 14:22:35 +03:00 • committed by Saeed Mahameed
commit 5d6b0cb336
6 changed files with 136 additions and 72 deletions
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7
include/rdma/ib_verbs.h
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@ -4198,4 +4198,11 @@ struct net_device *rdma_alloc_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 *));
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);
#endif /* IB_VERBS_H */