On Wed, Jan 06, 2021 at 02:22:12PM +0200, Leon Romanovsky wrote:
> diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c
> index da2512c30ffd..d6cd72ff213b 100644
> +++ b/drivers/infiniband/core/ucma.c
> @@ -1430,6 +1430,12 @@ static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf,
> return ret;
> }
>
> +static void ucma_flush_wq(struct rdma_cm_id *id)
> +{
> + if (rdma_protocol_roce(id->device, id->port_num))
> + cma_flush_wq();
> +}
The problem here is that rdma_leave_multicast() does not cancel the
work it created. It is a bug on the iboe side because the normal IB
side does do the ib_sa_free_multicast() which cancels its callback.
The fix is to add a cancel work to destroy_mc(), not queue flushing
Jason
