Netdev Archive on
help / color / mirror / Atom feed
From: Ziyang Xuan <>
To: <>
Cc: <>, <>,
	<>, <>,
	<>, <>
Subject: [PATCH net] net: hso: add failure handler for add_net_device
Date: Thu, 2 Sep 2021 16:36:09 +0800	[thread overview]
Message-ID: <> (raw)

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: 72dc1c096c70 ("HSO: add option hso driver")
Signed-off-by: Ziyang Xuan <>
 drivers/net/usb/hso.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c
index 24bc1e678b7b..422a07fd8814 100644
--- a/drivers/net/usb/hso.c
+++ b/drivers/net/usb/hso.c
@@ -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;
@@ -2550,8 +2554,9 @@ static struct hso_device *hso_create_net_device(struct usb_interface *interface,
 	return hso_dev;

             reply	other threads:[~2021-09-02  8:37 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-02  8:36 Ziyang Xuan [this message]
2021-09-02 11:00 ` patchwork-bot+netdevbpf

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \ \ \ \ \ \ \
    --subject='Re: [PATCH net] net: hso: add failure handler for add_net_device' \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).