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Commit 2d833179 authored by Evgeniy Polyakov's avatar Evgeniy Polyakov Committed by Greg Kroah-Hartman
Browse files

[PATCH] W1: w1_netlink: New init/fini netlink callbacks. 



They are guarded with NETLINK_DISABLE compile time options,
so if CONFIG_NET is disabled, no linking errors occur.
Bug noticed by Adrian Bunk <bunk@stusta.de>.

Signed-off-by: default avatarEvgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 1b11d78c

drivers/w1/w1_int.c

+6 −10
Original line number Diff line number Diff line
@@ -88,17 +88,14 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl, 


	dev->groups = 1;

	dev->seq = 1;

	dev->nls = netlink_kernel_create(NETLINK_W1, 1, NULL, THIS_MODULE);

	if (!dev->nls) {

		printk(KERN_ERR "Failed to create new netlink socket(%u) for w1 master %s.\n",

			NETLINK_NFLOG, dev->dev.bus_id);

	}

	dev_init_netlink(dev);



	err = device_register(&dev->dev);

	if (err) {

		printk(KERN_ERR "Failed to register master device. err=%d\n", err);

		if (dev->nls && dev->nls->sk_socket)

			sock_release(dev->nls->sk_socket);



		dev_fini_netlink(dev);



		memset(dev, 0, sizeof(struct w1_master));

		kfree(dev);

		dev = NULL;
@@ -107,11 +104,10 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl, 
	return dev;

}



static void w1_free_dev(struct w1_master *dev)

void w1_free_dev(struct w1_master *dev)

{

	device_unregister(&dev->dev);

	if (dev->nls && dev->nls->sk_socket)

		sock_release(dev->nls->sk_socket);

	dev_fini_netlink(dev);

	memset(dev, 0, sizeof(struct w1_master) + sizeof(struct w1_bus_master));

	kfree(dev);

}

drivers/w1/w1_netlink.c

+26 −0
Original line number Diff line number Diff line
@@ -57,10 +57,36 @@ void w1_netlink_send(struct w1_master *dev, struct w1_netlink_msg *msg) 
nlmsg_failure:

	return;

}



int dev_init_netlink(struct w1_master *dev)

{

	dev->nls = netlink_kernel_create(NETLINK_W1, 1, NULL, THIS_MODULE);

	if (!dev->nls) {

		printk(KERN_ERR "Failed to create new netlink socket(%u) for w1 master %s.\n",

			NETLINK_W1, dev->dev.bus_id);

	}



	return 0;

}



void dev_fini_netlink(struct w1_master *dev)

{

	if (dev->nls && dev->nls->sk_socket)

		sock_release(dev->nls->sk_socket);

}

#else

#warning Netlink support is disabled. Please compile with NET support enabled.



void w1_netlink_send(struct w1_master *dev, struct w1_netlink_msg *msg)

{

}



int dev_init_netlink(struct w1_master *dev)

{

	return 0;

}



void dev_fini_netlink(struct w1_master *dev)

{

}

#endif

drivers/w1/w1_netlink.h

+2 −0
Original line number Diff line number Diff line
@@ -52,6 +52,8 @@ struct w1_netlink_msg 
#ifdef __KERNEL__



void w1_netlink_send(struct w1_master *, struct w1_netlink_msg *);

int dev_init_netlink(struct w1_master *dev);

void dev_fini_netlink(struct w1_master *dev);



#endif /* __KERNEL__ */

#endif /* __W1_NETLINK_H */