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NFC: HCI check presence must not fail when driver doesn't support it

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When the driver does not support checking the tag is still present, it
must return -EOPNOTSUPP. The NFC Core will then stop asking and not
report a tag lost event to user space.

Signed-off-by: Eric Lapuyade <[email protected]>
Signed-off-by: Samuel Ortiz <[email protected]>
This commit is contained in:
Eric Lapuyade 2012-10-02 17:27:36 +02:00 • committed by Samuel Ortiz
commit 632c016ab8
2 changed files with 4 additions and 1 deletions
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2
drivers/nfc/pn544_hci.c
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@ -986,7 +986,7 @@ static int pn544_hci_check_presence(struct nfc_hci_dev *hdev,
} else if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) {
if (target->nfcid1_len != 4 && target->nfcid1_len != 7 &&
target->nfcid1_len != 10)
return -EPROTO;
return -EOPNOTSUPP;
return nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE,
PN544_RF_READER_CMD_ACTIVATE_NEXT,