summaryrefslogtreecommitdiffstats
path: root/net/nfc/netlink.c
diff options
context:
space:
mode:
authorSamuel Ortiz <sameo@linux.intel.com>2012-04-10 19:43:04 +0200
committerJohn W. Linville <linville@tuxdriver.com>2012-04-12 15:10:33 -0400
commit8112a5c91d781a22d2b631f3295386b0b70de7c8 (patch)
treed4239b5d7b2dff9d24b8db793cb6729c23f901c9 /net/nfc/netlink.c
parent997002785e3f932fd26a0f9c3cd91d4b4861ed29 (diff)
downloadop-kernel-dev-8112a5c91d781a22d2b631f3295386b0b70de7c8.zip
op-kernel-dev-8112a5c91d781a22d2b631f3295386b0b70de7c8.tar.gz
NFC: Add a target lost netlink event
Some chips are capable of detecting when a tag is out of the field, so they could send a netlink event about it to userspace. Signed-off-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/nfc/netlink.c')
-rw-r--r--net/nfc/netlink.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 6404052..ebdb605 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -183,6 +183,36 @@ free_msg:
return -EMSGSIZE;
}
+int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
+{
+ struct sk_buff *msg;
+ void *hdr;
+
+ msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
+ NFC_EVENT_TARGET_LOST);
+ if (!hdr)
+ goto free_msg;
+
+ NLA_PUT_STRING(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev));
+ NLA_PUT_U32(msg, NFC_ATTR_TARGET_INDEX, target_idx);
+
+ genlmsg_end(msg, hdr);
+
+ genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
+
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+free_msg:
+ nlmsg_free(msg);
+ return -EMSGSIZE;
+}
+
int nfc_genl_device_added(struct nfc_dev *dev)
{
struct sk_buff *msg;
OpenPOWER on IntegriCloud