diff options
Diffstat (limited to 'net/xdp/xdp_umem.c')
-rw-r--r-- | net/xdp/xdp_umem.c | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/net/xdp/xdp_umem.c b/net/xdp/xdp_umem.c index 2b18223e7eb8..20c91f02d3d8 100644 --- a/net/xdp/xdp_umem.c +++ b/net/xdp/xdp_umem.c @@ -105,6 +105,9 @@ int xdp_umem_assign_dev(struct xdp_umem *umem, struct net_device *dev, umem->dev = dev; umem->queue_id = queue_id; + + dev_hold(dev); + if (force_copy) /* For copy-mode, we are done. */ goto out_rtnl_unlock; @@ -124,7 +127,6 @@ int xdp_umem_assign_dev(struct xdp_umem *umem, struct net_device *dev, goto err_unreg_umem; rtnl_unlock(); - dev_hold(dev); umem->zc = true; return 0; @@ -138,34 +140,32 @@ out_rtnl_unlock: return err; } -static void xdp_umem_clear_dev(struct xdp_umem *umem) +void xdp_umem_clear_dev(struct xdp_umem *umem) { struct netdev_bpf bpf; int err; + ASSERT_RTNL(); + + if (!umem->dev) + return; + if (umem->zc) { bpf.command = XDP_SETUP_XSK_UMEM; bpf.xsk.umem = NULL; bpf.xsk.queue_id = umem->queue_id; - rtnl_lock(); err = umem->dev->netdev_ops->ndo_bpf(umem->dev, &bpf); - rtnl_unlock(); if (err) WARN(1, "failed to disable umem!\n"); } - if (umem->dev) { - rtnl_lock(); - xdp_clear_umem_at_qid(umem->dev, umem->queue_id); - rtnl_unlock(); - } + xdp_clear_umem_at_qid(umem->dev, umem->queue_id); - if (umem->zc) { - dev_put(umem->dev); - umem->zc = false; - } + dev_put(umem->dev); + umem->dev = NULL; + umem->zc = false; } static void xdp_umem_unpin_pages(struct xdp_umem *umem) @@ -193,7 +193,9 @@ static void xdp_umem_unaccount_pages(struct xdp_umem *umem) static void xdp_umem_release(struct xdp_umem *umem) { + rtnl_lock(); xdp_umem_clear_dev(umem); + rtnl_unlock(); ida_simple_remove(&umem_ida, umem->id); |