From c4835d81efb1795eb8bbeb40b73d74e5c04b1257 Mon Sep 17 00:00:00 2001 From: Dmitry Eremin-Solenikov Date: Thu, 10 Sep 2009 18:02:30 +0400 Subject: [PATCH] ieee802154: add locking for seq numbers Signed-off-by: Dmitry Eremin-Solenikov --- net/ieee802154/netlink.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/net/ieee802154/netlink.c b/net/ieee802154/netlink.c index 2106ecbf030..ca767bde17a 100644 --- a/net/ieee802154/netlink.c +++ b/net/ieee802154/netlink.c @@ -35,6 +35,7 @@ #include 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;