Re: [PATCH] RDMA/siw,rxe: Make emulated devices virtual in the device tree

[Jason Gunthorpe <jgg@nvidia.com>]

On Fri, Nov 06, 2020 at 10:00:49AM -0400, Jason Gunthorpe wrote:
> This moves siw and rxe to be virtual devices in the device tree:
> 
> lrwxrwxrwx 1 root root 0 Nov  6 13:55 /sys/class/infiniband/rxe0 -> ../../devices/virtual/infiniband/rxe0/
> 
> Previously they were trying to parent themselves to the physical device of
> their attached netdev, which doesn't make alot of sense.
> 
> My hope is this will solve some weird syzkaller hits related to sysfs as
> it could be possible that the parent of a netdev is another netdev, eg
> under bonding or some other syzkaller found netdev configuration.
> 
> Nesting a ib_device under anything but a physical device is going to cause
> inconsistencies in sysfs during destructions.
> 
> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
> ---
>  drivers/infiniband/sw/rxe/rxe_net.c   | 12 ------------
>  drivers/infiniband/sw/rxe/rxe_verbs.c |  1 -
>  drivers/infiniband/sw/siw/siw_main.c  | 19 +------------------
>  3 files changed, 1 insertion(+), 31 deletions(-)

Applied to for-next

Jason