This is a note to let you know that I've just added the patch titled
can: usb_8dev: unregister netdev before free()ing
to the 3.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
can-usb_8dev-unregister-netdev-before-free-ing.patch
and it can be found in the queue-3.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4afe2156eb639e563d6ef0c2706b66ea400348b2 Mon Sep 17 00:00:00 2001
From: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Date: Tue, 18 Jun 2013 14:33:58 +0200
Subject: can: usb_8dev: unregister netdev before free()ing
From: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
commit 4afe2156eb639e563d6ef0c2706b66ea400348b2 upstream.
The usb_8dev hardware has problems on some xhci USB hosts. The driver fails to
read the firmware revision in the probe function. This leads to the following
Oops:
[ 3356.635912] kernel BUG at net/core/dev.c:5701!
The driver tries to free the netdev, which has already been registered, without
unregistering it.
This patch fixes the problem by unregistering the netdev in the error path.
Reported-by: Michael Olbrich <m.olbrich@xxxxxxxxxxxxxx>
Reviewed-by: Bernd Krumboeck <krumboeck@xxxxxxxxxxxxxxx>
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Cc: Oliver Hartkopp <socketcan@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/can/usb/usb_8dev.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/net/can/usb/usb_8dev.c
+++ b/drivers/net/can/usb/usb_8dev.c
@@ -977,7 +977,7 @@ static int usb_8dev_probe(struct usb_int
err = usb_8dev_cmd_version(priv, &version);
if (err) {
netdev_err(netdev, "can't get firmware version\n");
- goto cleanup_cmd_msg_buffer;
+ goto cleanup_unregister_candev;
} else {
netdev_info(netdev,
"firmware: %d.%d, hardware: %d.%d\n",
@@ -989,6 +989,9 @@ static int usb_8dev_probe(struct usb_int
return 0;
+cleanup_unregister_candev:
+ unregister_netdev(priv->netdev);
+
cleanup_cmd_msg_buffer:
kfree(priv->cmd_msg_buffer);
Patches currently in stable-queue which might be from mkl@xxxxxxxxxxxxxx are
queue-3.9/can-usb_8dev-unregister-netdev-before-free-ing.patch
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