diff --git a/libnfc/drivers/acr122s.c b/libnfc/drivers/acr122s.c
index 791fca4..e4f8542 100644
--- a/libnfc/drivers/acr122s.c
+++ b/libnfc/drivers/acr122s.c
@@ -429,6 +429,7 @@ acr122s_scan(const nfc_context *context, nfc_connstring connstrings[], const siz
       nfc_device *pnd = nfc_device_new(context, connstring);
       if (!pnd) {
         perror("malloc");
+        uart_close(sp);
         return -1;
       }
 
@@ -436,6 +437,7 @@ acr122s_scan(const nfc_context *context, nfc_connstring connstrings[], const siz
       pnd->driver_data = malloc(sizeof(struct acr122s_data));
       if (!pnd->driver_data) {
         perror("malloc");
+        uart_close(sp);
         return -1;
       }
       DRIVER_DATA(pnd)->port = sp;
@@ -443,6 +445,7 @@ acr122s_scan(const nfc_context *context, nfc_connstring connstrings[], const siz
 
 #ifndef WIN32
       if (pipe(DRIVER_DATA(pnd)->abort_fds) < 0) {
+        uart_close(DRIVER_DATA(pnd)->port);
         return 0;
       }
 #else
@@ -459,9 +462,9 @@ acr122s_scan(const nfc_context *context, nfc_connstring connstrings[], const siz
         ret = -1;
       }
 
+      uart_close(DRIVER_DATA(pnd)->port);
       pn53x_data_free(pnd);
       nfc_device_free(pnd);
-      uart_close(sp);
 
       if (ret != 0)
         continue;
@@ -550,7 +553,7 @@ acr122s_open(const nfc_context *context, const nfc_connstring connstring)
   if (!pnd) {
     perror("malloc");
     free(ndd.port);
-    acr122s_close(pnd);
+    uart_close(sp);
     return NULL;
   }
   pnd->driver = &acr122s_driver;
@@ -560,7 +563,8 @@ acr122s_open(const nfc_context *context, const nfc_connstring connstring)
   pnd->driver_data = malloc(sizeof(struct acr122s_data));
   if (!pnd->driver_data) {
     perror("malloc");
-    acr122s_close(pnd);
+    uart_close(sp);
+    nfc_device_free(pnd);
     return NULL;
   }
 
@@ -569,7 +573,8 @@ acr122s_open(const nfc_context *context, const nfc_connstring connstring)
 
 #ifndef WIN32
   if (pipe(DRIVER_DATA(pnd)->abort_fds) < 0) {
-    acr122s_close(pnd);
+    uart_close(DRIVER_DATA(pnd)->port);
+    nfc_device_free(pnd);
     return NULL;
   }
 #else
diff --git a/libnfc/drivers/arygon.c b/libnfc/drivers/arygon.c
index dc0bb8f..35f4dfd 100644
--- a/libnfc/drivers/arygon.c
+++ b/libnfc/drivers/arygon.c
@@ -120,6 +120,7 @@ arygon_scan(const nfc_context *context, nfc_connstring connstrings[], const size
       nfc_device *pnd = nfc_device_new(context, connstring);
       if (!pnd) {
         perror("malloc");
+        uart_close(sp);
         return 0;
       }
 
@@ -127,6 +128,7 @@ arygon_scan(const nfc_context *context, nfc_connstring connstrings[], const size
       pnd->driver_data = malloc(sizeof(struct arygon_data));
       if (!pnd->driver_data) {
         perror("malloc");
+        uart_close(sp);
         return 0;
       }
       DRIVER_DATA(pnd)->port = sp;
@@ -137,6 +139,7 @@ arygon_scan(const nfc_context *context, nfc_connstring connstrings[], const size
 #ifndef WIN32
       // pipe-based abort mecanism
       if (pipe(DRIVER_DATA(pnd)->iAbortFds) < 0) {
+        uart_close(DRIVER_DATA(pnd)->port);
         return 0;
       }
 #else
@@ -144,9 +147,9 @@ arygon_scan(const nfc_context *context, nfc_connstring connstrings[], const size
 #endif
 
       int res = arygon_reset_tama(pnd);
+      uart_close(DRIVER_DATA(pnd)->port);
       pn53x_data_free(pnd);
       nfc_device_free(pnd);
-      uart_close(sp);
       if (res < 0) {
         continue;
       }
@@ -237,6 +240,7 @@ arygon_open(const nfc_context *context, const nfc_connstring connstring)
   if (!pnd) {
     perror("malloc");
     free(ndd.port);
+    uart_close(sp);
     return NULL;
   }
   snprintf(pnd->name, sizeof(pnd->name), "%s:%s", ARYGON_DRIVER_NAME, ndd.port);
@@ -245,6 +249,7 @@ arygon_open(const nfc_context *context, const nfc_connstring connstring)
   pnd->driver_data = malloc(sizeof(struct arygon_data));
   if (!pnd->driver_data) {
     perror("malloc");
+    uart_close(sp);
     return NULL;
   }
   DRIVER_DATA(pnd)->port = sp;
@@ -262,6 +267,7 @@ arygon_open(const nfc_context *context, const nfc_connstring connstring)
 #ifndef WIN32
   // pipe-based abort mecanism
   if (pipe(DRIVER_DATA(pnd)->iAbortFds) < 0) {
+    uart_close(DRIVER_DATA(pnd)->port);
     return NULL;
   }
 #else
diff --git a/libnfc/drivers/pn532_uart.c b/libnfc/drivers/pn532_uart.c
index 68b35dd..d82555d 100644
--- a/libnfc/drivers/pn532_uart.c
+++ b/libnfc/drivers/pn532_uart.c
@@ -90,12 +90,14 @@ pn532_uart_scan(const nfc_context *context, nfc_connstring connstrings[], const
       nfc_device *pnd = nfc_device_new(context, connstring);
       if (!pnd) {
         perror("malloc");
+        uart_close(sp);
         return 0;
       }
       pnd->driver = &pn532_uart_driver;
       pnd->driver_data = malloc(sizeof(struct pn532_uart_data));
       if (!pnd->driver_data) {
         perror("malloc");
+        uart_close(sp);
         return 0;
       }
       DRIVER_DATA(pnd)->port = sp;
@@ -110,6 +112,7 @@ pn532_uart_scan(const nfc_context *context, nfc_connstring connstrings[], const
 #ifndef WIN32
       // pipe-based abort mecanism
       if (pipe(DRIVER_DATA(pnd)->iAbortFds) < 0) {
+        uart_close(DRIVER_DATA(pnd)->port);
         return 0;
       }
 #else
@@ -118,9 +121,9 @@ pn532_uart_scan(const nfc_context *context, nfc_connstring connstrings[], const
 
       // Check communication using "Diagnose" command, with "Communication test" (0x00)
       int res = pn53x_check_communication(pnd);
+      uart_close(DRIVER_DATA(pnd)->port);
       pn53x_data_free(pnd);
       nfc_device_free(pnd);
-      uart_close(sp);
       if (res < 0) {
         continue;
       }
@@ -209,6 +212,7 @@ pn532_uart_open(const nfc_context *context, const nfc_connstring connstring)
   if (!pnd) {
     perror("malloc");
     free(ndd.port);
+    uart_close(sp);
     return NULL;
   }
   snprintf(pnd->name, sizeof(pnd->name), "%s:%s", PN532_UART_DRIVER_NAME, ndd.port);
@@ -217,6 +221,7 @@ pn532_uart_open(const nfc_context *context, const nfc_connstring connstring)
   pnd->driver_data = malloc(sizeof(struct pn532_uart_data));
   if (!pnd->driver_data) {
     perror("malloc");
+    uart_close(sp);
     return NULL;
   }
   DRIVER_DATA(pnd)->port = sp;
@@ -235,6 +240,7 @@ pn532_uart_open(const nfc_context *context, const nfc_connstring connstring)
 #ifndef WIN32
   // pipe-based abort mecanism
   if (pipe(DRIVER_DATA(pnd)->iAbortFds) < 0) {
+    uart_close(DRIVER_DATA(pnd)->port);
     return NULL;
   }
 #else