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Commit 632c016a authored Oct 02, 2012 by Eric Lapuyade Committed by Samuel Ortiz Oct 26, 2012

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



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 <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

parent da052850

drivers/nfc/pn544_hci.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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,

net/nfc/core.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -697,6 +697,8 @@ static void nfc_check_pres_work(struct work_struct *work)

		if (dev->active_target && timer_pending(&dev->check_pres_timer) == 0) {
		rc = dev->ops->check_presence(dev, dev->active_target);
		if (rc == -EOPNOTSUPP)
		goto exit;
		if (!rc) {
		mod_timer(&dev->check_pres_timer, jiffies +
		msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS));
		@@ -708,6 +710,7 @@ static void nfc_check_pres_work(struct work_struct *work)
		}
		}

		exit:
		device_unlock(&dev->dev);
		}