From 5fe3fbdb5d39ff3cf5f1b7a7e45f26c6a5a1f609 Mon Sep 17 00:00:00 2001
From: Romuald Conty <romuald@libnfc.org>
Date: Thu, 30 Jan 2014 11:10:18 +0100
Subject: [PATCH] Fix nfc_target_is_present() when removing a ISO14443-4A
 target from a PN532-based device

---
 libnfc/chips/pn53x.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libnfc/chips/pn53x.c b/libnfc/chips/pn53x.c
index cd9d2c6..36a4720 100644
--- a/libnfc/chips/pn53x.c
+++ b/libnfc/chips/pn53x.c
@@ -1780,6 +1780,8 @@ pn53x_initiator_target_is_present(struct nfc_device *pnd, const nfc_target *pnt)
         log_put(LOG_GROUP, LOG_CATEGORY, NFC_LOG_PRIORITY_DEBUG, "%s", "target_is_present(): Ping -4A");
         if ((CHIP_DATA(pnd)->type == PN532) || (CHIP_DATA(pnd)->type == PN533)) {
           ret = pn53x_Diagnose06(pnd);
+          // When pn53x_Diagnose06() fails with a timeout (0x01) chip error, it means the target is not reacheable anymore
+          if ((ret == NFC_ERFTRANS) && (CHIP_DATA(pnd)->last_status_byte == 0x01)) ret = NFC_ETGRELEASED;
         } else {
           ret = NFC_EDEVNOTSUPP;
         }