[PATCH bluetooth-next] 6lowpan: fix debugfs interface entry name

[PATCH bluetooth-next] 6lowpan: fix debugfs interface entry name

[Alexander Aring]

This patches moves the debugfs interface related register after
netdevice register. The function lowpan_dev_debugfs_init will use
"dev->name" which can be before register_netdevice a format string.
The function register_netdevice will evaluate the format string if
necessary and replace "dev->name" to the real interface name.

Reported-by: Lukasz Duda <lukasz.duda-hR+23Fw+YnFSHonuZl5R5Q@public.gmane.org>
Signed-off-by: Alexander Aring <alex.aring-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 net/6lowpan/core.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/6lowpan/core.c b/net/6lowpan/core.c
index c7f06f5..faf65ba 100644
--- a/net/6lowpan/core.c
+++ b/net/6lowpan/core.c
@@ -29,13 +29,13 @@ int lowpan_register_netdevice(struct net_device *dev,
 
 	lowpan_priv(dev)->lltype = lltype;
 
-	ret = lowpan_dev_debugfs_init(dev);
+	ret = register_netdevice(dev);
 	if (ret < 0)
 		return ret;
 
-	ret = register_netdevice(dev);
+	ret = lowpan_dev_debugfs_init(dev);
 	if (ret < 0)
-		lowpan_dev_debugfs_exit(dev);
+		unregister_netdevice(dev);
 
 	return ret;
 }
-- 
2.6.1

RE: [PATCH bluetooth-next] 6lowpan: fix debugfs interface entry name

[Duda, Lukasz]

Hi Alex,

> -----Original Message-----
> From: Alexander Aring [mailto:alex.aring@gmail.com]
> Sent: Tuesday, December 15, 2015 12:26
> To: linux-wpan@vger.kernel.org
> Cc: linux-bluetooth@vger.kernel.org; netdev@vger.kernel.org;
> kernel@pengutronix.de; Duda, Lukasz; Alexander Aring
> Subject: [PATCH bluetooth-next] 6lowpan: fix debugfs interface entry name
> 
> This patches moves the debugfs interface related register after netdevice
> register. The function lowpan_dev_debugfs_init will use "dev->name" which
> can be before register_netdevice a format string.
> The function register_netdevice will evaluate the format string if necessary
> and replace "dev->name" to the real interface name.
> 
> Reported-by: Lukasz Duda <lukasz.duda@nordicsemi.no>
> Signed-off-by: Alexander Aring <alex.aring@gmail.com>
> ---
>  net/6lowpan/core.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/net/6lowpan/core.c b/net/6lowpan/core.c index c7f06f5..faf65ba
> 100644
> --- a/net/6lowpan/core.c
> +++ b/net/6lowpan/core.c
> @@ -29,13 +29,13 @@ int lowpan_register_netdevice(struct net_device
> *dev,
> 
>  	lowpan_priv(dev)->lltype = lltype;
> 
> -	ret = lowpan_dev_debugfs_init(dev);
> +	ret = register_netdevice(dev);
>  	if (ret < 0)
>  		return ret;
> 
> -	ret = register_netdevice(dev);
> +	ret = lowpan_dev_debugfs_init(dev);
>  	if (ret < 0)
> -		lowpan_dev_debugfs_exit(dev);
> +		unregister_netdevice(dev);
> 
>  	return ret;
>  }
> --
> 2.6.1

Thanks, after this change I do have correct interface name under
/sys/kernel/debug/6lowpan for Bluetooth Low Energy (bt0).

Acked-by: Lukasz Duda <lukasz.duda@nordicsemi.no>

Best regards,
Łukasz

Re: [PATCH bluetooth-next] 6lowpan: fix debugfs interface entry name

[Marcel Holtmann]

Hi Alex,

> This patches moves the debugfs interface related register after
> netdevice register. The function lowpan_dev_debugfs_init will use
> "dev->name" which can be before register_netdevice a format string.
> The function register_netdevice will evaluate the format string if
> necessary and replace "dev->name" to the real interface name.
> 
> Reported-by: Lukasz Duda <lukasz.duda@nordicsemi.no>
> Signed-off-by: Alexander Aring <alex.aring@gmail.com>
> ---
> net/6lowpan/core.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel