net: devmem: move list_add to net_devmem_bind_dmabuf.

It's annoying for the list_add to be outside net_devmem_bind_dmabuf, but
the list_del is in net_devmem_unbind_dmabuf. Make it consistent by
having both the list_add/del be inside the net_devmem_[un]bind_dmabuf.

Cc: ap420073@gmail.com
Signed-off-by: Mina Almasry <almasrymina@google.com>
Tested-by: Taehee Yoo <ap420073@gmail.com>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20250523230524.1107879-2-almasrymina@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/net/core/devmem.c b/net/core/devmem.c
index 0dba26b..b3a62ca 100644 (file)
--- a/net/core/devmem.c
+++ b/net/core/devmem.c
@@ -178,7 +178,8 @@ err_close_rxq:
 struct net_devmem_dmabuf_binding *
 net_devmem_bind_dmabuf(struct net_device *dev,
                       enum dma_data_direction direction,
-                      unsigned int dmabuf_fd, struct netlink_ext_ack *extack)
+                      unsigned int dmabuf_fd, struct netdev_nl_sock *priv,
+                      struct netlink_ext_ack *extack)
 {
        struct net_devmem_dmabuf_binding *binding;
        static u32 id_alloc_next;
@@ -299,6 +300,8 @@ net_devmem_bind_dmabuf(struct net_device *dev,
        if (err < 0)
                goto err_free_chunks;
 
+       list_add(&binding->list, &priv->bindings);
+
        return binding;
 
 err_free_chunks:

diff --git a/net/core/devmem.h b/net/core/devmem.h
index 58d8d3c..e7ba770 100644 (file)
--- a/net/core/devmem.h
+++ b/net/core/devmem.h
@@ -11,6 +11,7 @@
 #define _NET_DEVMEM_H
 
 #include <net/netmem.h>
+#include <net/netdev_netlink.h>
 
 struct netlink_ext_ack;
 
@@ -82,7 +83,8 @@ void __net_devmem_dmabuf_binding_free(struct work_struct *wq);
 struct net_devmem_dmabuf_binding *
 net_devmem_bind_dmabuf(struct net_device *dev,
                       enum dma_data_direction direction,
-                      unsigned int dmabuf_fd, struct netlink_ext_ack *extack);
+                      unsigned int dmabuf_fd, struct netdev_nl_sock *priv,
+                      struct netlink_ext_ack *extack);
 struct net_devmem_dmabuf_binding *net_devmem_lookup_dmabuf(u32 id);
 void net_devmem_unbind_dmabuf(struct net_devmem_dmabuf_binding *binding);
 int net_devmem_bind_dmabuf_to_queue(struct net_device *dev, u32 rxq_idx,
@@ -170,6 +172,7 @@ static inline void __net_devmem_dmabuf_binding_free(struct work_struct *wq)
 static inline struct net_devmem_dmabuf_binding *
 net_devmem_bind_dmabuf(struct net_device *dev, unsigned int dmabuf_fd,
                       enum dma_data_direction direction,
+                      struct netdev_nl_sock *priv,
                       struct netlink_ext_ack *extack)
 {
        return ERR_PTR(-EOPNOTSUPP);

diff --git a/net/core/netdev-genl.c b/net/core/netdev-genl.c
index 762570d..2afa7b2 100644 (file)
--- a/net/core/netdev-genl.c
+++ b/net/core/netdev-genl.c
@@ -908,7 +908,7 @@ int netdev_nl_bind_rx_doit(struct sk_buff *skb, struct genl_info *info)
        }
 
        binding = net_devmem_bind_dmabuf(netdev, DMA_FROM_DEVICE, dmabuf_fd,
-                                        info->extack);
+                                        priv, info->extack);
        if (IS_ERR(binding)) {
                err = PTR_ERR(binding);
                goto err_unlock;
@@ -943,8 +943,6 @@ int netdev_nl_bind_rx_doit(struct sk_buff *skb, struct genl_info *info)
                        goto err_unbind;
        }
 
-       list_add(&binding->list, &priv->bindings);
-
        nla_put_u32(rsp, NETDEV_A_DMABUF_ID, binding->id);
        genlmsg_end(rsp, hdr);
 
@@ -1020,15 +1018,13 @@ int netdev_nl_bind_tx_doit(struct sk_buff *skb, struct genl_info *info)
                goto err_unlock_netdev;
        }
 
-       binding = net_devmem_bind_dmabuf(netdev, DMA_TO_DEVICE, dmabuf_fd,
+       binding = net_devmem_bind_dmabuf(netdev, DMA_TO_DEVICE, dmabuf_fd, priv,
                                         info->extack);
        if (IS_ERR(binding)) {
                err = PTR_ERR(binding);
                goto err_unlock_netdev;
        }
 
-       list_add(&binding->list, &priv->bindings);
-
        nla_put_u32(rsp, NETDEV_A_DMABUF_ID, binding->id);
        genlmsg_end(rsp, hdr);