From 6e035c33f3fd6e14963c884ad6bab680a0848795 Mon Sep 17 00:00:00 2001
From: jpwidera <idups@posteo.de>
Date: Thu, 5 Sep 2019 22:32:03 +0200
Subject: [PATCH] Re-enabled claim

If there are alternative interfaces, claim interface 0. Otherwise skip this step.
---
 libnfc/drivers/acr122_usb.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/libnfc/drivers/acr122_usb.c b/libnfc/drivers/acr122_usb.c
index 609a495..8931aab 100644
--- a/libnfc/drivers/acr122_usb.c
+++ b/libnfc/drivers/acr122_usb.c
@@ -427,6 +427,17 @@ acr122_usb_open(const nfc_context *context, const nfc_connstring connstring)
         goto free_mem;
       }
 
+	  // Check if there are more than 0 alternative interfaces and claim the first one
+	  if (dev->config->interface->altsetting->bAlternateSetting > 0) {
+        res = usb_set_altinterface(data.pudh, 0);
+        if (res < 0) {
+          log_put(LOG_GROUP, LOG_CATEGORY, NFC_LOG_PRIORITY_ERROR, "Unable to set alternate setting on USB interface (%s)", _usb_strerror(res));
+          usb_close(data.pudh);
+          // we failed to use the specified device
+          goto free_mem;
+        }
+	  }
+
       // Allocate memory for the device info and specification, fill it and return the info
       pnd = nfc_device_new(context, connstring);
       if (!pnd) {