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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 <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Eric Lapuyade 2012-10-02 17:27:36 +02:00 • committed by Samuel Ortiz
parent da052850b9
commit 632c016ab8
2 changed files with 4 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

2
drivers/nfc/pn544_hci.c
View file

@ -986,7 +986,7 @@ static int pn544_hci_check_presence(struct nfc_hci_dev *hdev,
} else if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) { } else if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) {
if (target->nfcid1_len != 4 && target->nfcid1_len != 7 && if (target->nfcid1_len != 4 && target->nfcid1_len != 7 &&
target->nfcid1_len != 10) target->nfcid1_len != 10)
return -EPROTO; return -EOPNOTSUPP;
return nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE, return nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE,
PN544_RF_READER_CMD_ACTIVATE_NEXT, PN544_RF_READER_CMD_ACTIVATE_NEXT,

3
net/nfc/core.c
View file

@ -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) { if (dev->active_target && timer_pending(&dev->check_pres_timer) == 0) {
rc = dev->ops->check_presence(dev, dev->active_target); rc = dev->ops->check_presence(dev, dev->active_target);
if (rc == -EOPNOTSUPP)
goto exit;
if (!rc) { if (!rc) {
mod_timer(&dev->check_pres_timer, jiffies + mod_timer(&dev->check_pres_timer, jiffies +
msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS)); 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); device_unlock(&dev->dev);
} }