diff options
| author | Samuel Ortiz <sameo@linux.intel.com> | 2012-04-10 21:43:04 +0400 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-04-12 23:10:33 +0400 |
| commit | 8112a5c91d781a22d2b631f3295386b0b70de7c8 (patch) | |
| tree | d4239b5d7b2dff9d24b8db793cb6729c23f901c9 /net/nfc/netlink.c | |
| parent | 997002785e3f932fd26a0f9c3cd91d4b4861ed29 (diff) | |
| download | linux-8112a5c91d781a22d2b631f3295386b0b70de7c8.tar.xz | |
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.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c index 6404052d6c07..ebdb605f8dbd 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; |