Subject: [PATCH 5/7] can: clear ctrlmode when close candev

From: [email-masked] (Marc Kleine-Budde)
Date: Mon, 03 Nov 2014 17:28:48 +0100

On 10/29/2014 11:45 AM, Dong Aisheng wrote:
> Currently priv->ctrlmode is not cleared when close_candev, so next time
> the driver will still use this value to set controller even user
> does not set any ctrl mode.
> e.g.
> Step 1. ip link set can0 up type can0 bitrate 1000000 loopback on
> Controller will be in loopback mode
> Step 2. ip link set can0 down
> Step 3. ip link set can0 up type can0 bitrate 1000000
> Controller will still be set to loopback mode in driver due to saved
> priv->ctrlmode.
> 
> This patch clears priv->ctrlmode when the CAN interface is closed,
> and set it to correct mode according to next user setting.

Oliver, what do you think of this patch? It will introduce a subtle
change to the userspace.

Marc

> Signed-off-by: Dong Aisheng <[email-masked]>
> ---
>  drivers/net/can/dev.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c
> index 02492d2..1fce485 100644
> --- a/drivers/net/can/dev.c
> +++ b/drivers/net/can/dev.c
> @@ -671,6 +671,7 @@ void close_candev(struct net_device *dev)
>  
>  	del_timer_sync(&priv->restart_timer);
>  	can_flush_echo_skb(dev);
> +	priv->ctrlmode = 0;
>  }
>  EXPORT_SYMBOL_GPL(close_candev);
>  
> 

-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
Vertretung West/Dortmund          | Fax:   +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686  | http://www.pengutronix.de   |

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