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Commit c4835d81 authored by Dmitry Eremin-Solenikov's avatar Dmitry Eremin-Solenikov
Browse files

ieee802154: add locking for seq numbers 



Signed-off-by: default avatarDmitry Eremin-Solenikov <dbaryshkov@gmail.com>
parent 066fc512

net/ieee802154/netlink.c

+4 −0
Original line number Diff line number Diff line
@@ -35,6 +35,7 @@ 
#include <net/ieee802154_netdev.h>



static unsigned int ieee802154_seq_num;

static DEFINE_SPINLOCK(ieee802154_seq_lock);



static struct genl_family ieee802154_coordinator_family = {

	.id		= GENL_ID_GENERATE,
@@ -57,12 +58,15 @@ static struct sk_buff *ieee802154_nl_create(int flags, u8 req) 
{

	void *hdr;

	struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);

	unsigned long f;



	if (!msg)

		return NULL;



	spin_lock_irqsave(&ieee802154_seq_lock, f);

	hdr = genlmsg_put(msg, 0, ieee802154_seq_num++,

			&ieee802154_coordinator_family, flags, req);

	spin_unlock_irqrestore(&ieee802154_seq_lock, f);

	if (!hdr) {

		nlmsg_free(msg);

		return NULL;