提交 ecdc28de 编写于 作者: Z Ziyang Xuan 提交者: David S. Miller

net: hso: add failure handler for add_net_device

If the network devices connected to the system beyond
HSO_MAX_NET_DEVICES. add_net_device() in hso_create_net_device()
will be failed for the network_table is full. It will lead to
business failure which rely on network_table, for example,
hso_suspend() and hso_resume(). It will also lead to memory leak
because resource release process can not search the hso_device
object from network_table in hso_free_interface().

Add failure handler for add_net_device() in hso_create_net_device()
to solve the above problems.

Fixes: 72dc1c09 ("HSO: add option hso driver")
Signed-off-by: NZiyang Xuan <william.xuanziyang@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 b9edbfe1
......@@ -2535,13 +2535,17 @@ static struct hso_device *hso_create_net_device(struct usb_interface *interface,
if (!hso_net->mux_bulk_tx_buf)
goto err_free_tx_urb;
add_net_device(hso_dev);
result = add_net_device(hso_dev);
if (result) {
dev_err(&interface->dev, "Failed to add net device\n");
goto err_free_tx_buf;
}
/* registering our net device */
result = register_netdev(net);
if (result) {
dev_err(&interface->dev, "Failed to register device\n");
goto err_free_tx_buf;
goto err_rmv_ndev;
}
hso_log_port(hso_dev);
......@@ -2550,8 +2554,9 @@ static struct hso_device *hso_create_net_device(struct usb_interface *interface,
return hso_dev;
err_free_tx_buf:
err_rmv_ndev:
remove_net_device(hso_dev);
err_free_tx_buf:
kfree(hso_net->mux_bulk_tx_buf);
err_free_tx_urb:
usb_free_urb(hso_net->mux_bulk_tx_urb);
......
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