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| author | Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> | 2009-09-10 18:02:30 +0400 |
|---|---|---|
| committer | Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> | 2009-09-15 18:25:16 +0400 |
| commit | c4835d81efb1795eb8bbeb40b73d74e5c04b1257 (patch) | |
| tree | 7d53e4752110d011d750baed1314f01afb374a78 /net/ieee802154 | |
| parent | 066fc51275cef94d1624fd58bb3065d050a6f17e (diff) | |
| download | lwn-c4835d81efb1795eb8bbeb40b73d74e5c04b1257.tar.gz lwn-c4835d81efb1795eb8bbeb40b73d74e5c04b1257.zip | |
ieee802154: add locking for seq numbers
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Diffstat (limited to 'net/ieee802154')
| -rw-r--r-- | net/ieee802154/netlink.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ieee802154/netlink.c b/net/ieee802154/netlink.c index 2106ecbf0308..ca767bde17a4 100644 --- a/net/ieee802154/netlink.c +++ b/net/ieee802154/netlink.c @@ -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; |