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authorJohn W. Linville <linville@tuxdriver.com>2012-07-12 13:44:50 -0400
committerJohn W. Linville <linville@tuxdriver.com>2012-07-12 13:44:50 -0400
commit38a00840638b4932152bca48098dbfa069d942a2 (patch)
treedd12897854f6df8aac237d5fd46551c74be8153a /net/nfc/netlink.c
parent391e5c22f5f4e55817f8ba18a08ea717ed2d4a1f (diff)
parent2f8684ce7a47c91da7e0ccba2686277c103d02b6 (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
Diffstat (limited to 'net/nfc/netlink.c')
-rw-r--r--net/nfc/netlink.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index f4f07f9b61c0..4c51714ee741 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -634,6 +634,15 @@ static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
if (!dev)
return -ENODEV;
+ device_lock(&dev->dev);
+
+ if (!dev->polling) {
+ device_unlock(&dev->dev);
+ return -EINVAL;
+ }
+
+ device_unlock(&dev->dev);
+
mutex_lock(&dev->genl_data.genl_data_mutex);
if (dev->genl_data.poll_req_pid != info->snd_pid) {