From: Eric Lapuyade Date: Tue, 2 Oct 2012 15:27:36 +0000 (+0200) Subject: NFC: HCI check presence must not fail when driver doesn't support it X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=632c016ab8ba1f98262bd6242b38d73ee4ae652e;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git 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 Signed-off-by: Samuel Ortiz --- diff --git a/drivers/nfc/pn544_hci.c b/drivers/nfc/pn544_hci.c index b66d4681a577..70858b5f81e4 100644 --- a/drivers/nfc/pn544_hci.c +++ b/drivers/nfc/pn544_hci.c @@ -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, diff --git a/net/nfc/core.c b/net/nfc/core.c index 479bee36dc3e..4cb069766ce5 100644 --- a/net/nfc/core.c +++ b/net/nfc/core.c @@ -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); }