From mboxrd@z Thu Jan  1 00:00:00 1970
From: greg@kroah.com (Greg KH)
Date: Tue, 20 Jun 2017 22:12:34 +0800
Subject: My network device don't work
In-Reply-To: <186270325-26e3212af6540c227a34d3cd3b5e0c56@pmq3v.m5r2.onet>
References: <186270325-26e3212af6540c227a34d3cd3b5e0c56@pmq3v.m5r2.onet>
Message-ID: <20170620141234.GA2599@kroah.com>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

On Tue, Jun 20, 2017 at 02:32:31PM +0200, wiktoria.lewicka wrote:
> Hello.
> I write simple network device, but its don't work. Module is loading, loading, loading...
> Code:
> 
> #include <linux/kernel.h>
> #include <linux/module.h>
> #include <linux/init.h>
> #include <linux/netdevice.h>
> #include <linux/string.h>
> #define DEV_NAME "chwdp"
> 
> struct net_device my_netdev;
> 
> int init_my_net_dev(struct net_device *dev);
> 
> struct net_device_ops nops = {
>   .ndo_init = init_my_net_dev,
>   //.ndo_uninit = uninit_my_net_dev,
> };
> 
> static int __init init_dev(void)
> {
>   //my_netdev.netdev_ops = &nops;
>   int result;
>   if((netdev_boot_setup_check(&my_netdev))){
>     printk(KERN_ERR "NETDEV: setup error");
>     return 0;

Why are you returning success if there was an error?

And always try to use proper kernel coding style when writing kernel
code if you expect/want someone else to read it :)

thanks,

greg k-h