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ieee802154: add locking for seq numbers

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Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
This commit is contained in:
Dmitry Eremin-Solenikov
2009-09-10 18:02:30 +04:00
parent 066fc51275
commit c4835d81ef
1 changed files with 4 additions and 0 deletions
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4
net/ieee802154/netlink.c
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@@ -35,6 +35,7 @@
#include <net/ieee802154_netdev.h> #include <net/ieee802154_netdev.h>
static unsigned int ieee802154_seq_num; static unsigned int ieee802154_seq_num;
static DEFINE_SPINLOCK(ieee802154_seq_lock);
static struct genl_family ieee802154_coordinator_family = { static struct genl_family ieee802154_coordinator_family = {
.id = GENL_ID_GENERATE, .id = GENL_ID_GENERATE,
@@ -57,12 +58,15 @@ static struct sk_buff *ieee802154_nl_create(int flags, u8 req)
{ {
void *hdr; void *hdr;
struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
unsigned long f;
if (!msg) if (!msg)
return NULL; return NULL;
spin_lock_irqsave(&ieee802154_seq_lock, f);
hdr = genlmsg_put(msg, 0, ieee802154_seq_num++, hdr = genlmsg_put(msg, 0, ieee802154_seq_num++,
&ieee802154_coordinator_family, flags, req); &ieee802154_coordinator_family, flags, req);
spin_unlock_irqrestore(&ieee802154_seq_lock, f);
if (!hdr) { if (!hdr) {
nlmsg_free(msg); nlmsg_free(msg);
return NULL; return NULL;