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NFC: Changed event_received hci ops result semantic

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Some chips use a standard HCI event code, destined to a proprietary
gate, with a different meaning. Therefore, the HCI driver must always
have a chance to intercept the event before standard processing is
attempted.
The new semantic specifies that the result value "1" means that the
driver doesn't especially handle the event. result <= 0 means it was
handled.

Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Eric Lapuyade 2012-12-04 16:43:24 +01:00 • committed by Samuel Ortiz
parent 27c31191b3
commit 40d06d3647
2 changed files with 19 additions and 11 deletions
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14
net/nfc/hci/core.c
View file

@ -297,6 +297,12 @@ void nfc_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event,
goto exit;
}
if (hdev->ops->event_received) {
r = hdev->ops->event_received(hdev, gate, event, skb);
if (r <= 0)
goto exit_noskb;
}
switch (event) {
case NFC_HCI_EVT_TARGET_DISCOVERED:
if (skb->len < 1) { /* no status data? */
@ -322,12 +328,8 @@ void nfc_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event,
r = nfc_hci_target_discovered(hdev, gate);
break;
default:
if (hdev->ops->event_received) {
r = hdev->ops->event_received(hdev, gate, event, skb);
goto exit_noskb;
} else {
r = -EINVAL;
}
pr_info("Discarded unknown event %x to gate %x\n", event, gate);
r = -EINVAL;
break;
}