On Fri, May 12, 2017 at 12:59:59PM +0200, Christian Gromm wrote:
> From: Andrey Shvetsov <andrey.shvet...@k2l.de>
>
> This introduces the kref for the net_dev_context to prevent the
> destruction of the network devices that are in use.
>
> Each get_net_dev_context is completed with the put_net_dev_context,
> except the function aim_probe_channel that calls one more
> get_net_dev_context or kref_get and the function aim_disconnect_channel
> that calls one more put_net_dev_context.
>
> Signed-off-by: Andrey Shvetsov <andrey.shvet...@k2l.de>
> Signed-off-by: Christian Gromm <christian.gr...@microchip.com>
> ---
> drivers/staging/most/aim-network/networking.c | 92
> +++++++++++++++++++++------
> 1 file changed, 72 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/staging/most/aim-network/networking.c
> b/drivers/staging/most/aim-network/networking.c
> index cbd9500..8cf1c81 100644
> --- a/drivers/staging/most/aim-network/networking.c
> +++ b/drivers/staging/most/aim-network/networking.c
> @@ -21,6 +21,7 @@
> #include <linux/list.h>
> #include <linux/wait.h>
> #include <linux/kobject.h>
> +#include <linux/kref.h>
> #include "mostcore.h"
>
> #define MEP_HDR_LEN 8
> @@ -69,6 +70,7 @@ struct net_dev_context {
> struct net_dev_channel rx;
> struct net_dev_channel tx;
> struct list_head list;
> + struct kref kref;
> };
>
> static struct list_head net_devices = LIST_HEAD_INIT(net_devices);
> @@ -268,6 +270,26 @@ static void most_nd_setup(struct net_device *dev)
> dev->netdev_ops = &most_nd_ops;
> }
>
> +static void release_nd(struct kref *kref)
> +{
> + struct net_dev_context *nd;
> +
> + nd = container_of(kref, struct net_dev_context, kref);
> + list_del(&nd->list);
That might delete something off of the list, but it does not free the
structure itself, where is that handled?
Why do you need a reference count for all of this? Doesn't the
networking core provide you the needed functions for this?
thanks,
greg k-h
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