1 files changed, 10 insertions, 8 deletions

diff --git a/src/iphone.c b/src/iphone.c
index 6eb56f7..5076b48 100644
--- a/src/iphone.c
+++ b/src/iphone.c
@@ -95,7 +95,7 @@ static void iphone_config_usb_device(iphone_device_t phone)
  *      descriptor on return. 
  * @return IPHONE_E_SUCCESS if ok, otherwise an error code.
  */
-static iphone_error_t iphone_get_specific_device(unsigned int bus_n, int dev_n, iphone_device_t * device)
+iphone_error_t iphone_get_specific_device(unsigned int bus_n, int dev_n, iphone_device_t * device)
 {
         struct usb_bus *bus, *busses;
         struct usb_device *dev;
@@ -230,13 +230,15 @@ iphone_error_t iphone_free_device(iphone_device_t device)
         unsigned char buf[512];
 
         // read final package(s)
-        do {
-                bytes = usb_bulk_read(device->device, BULKIN, (void *) &buf, 512, 800);
-                if (bytes > 0) {
-                        log_debug_msg("iphone_free_device: final read returned\n");
-                        log_debug_buffer(buf, bytes);
-                }
-        } while (bytes > 0);
+        if (device->device != NULL) {
+                do {
+                        bytes = usb_bulk_read(device->device, BULKIN, (void *) &buf, 512, 800);
+                        if (bytes > 0) {
+                                log_debug_msg("iphone_free_device: final read returned\n");
+                                log_debug_buffer(buf, bytes);
+                        }
+                } while (bytes > 0);
+        }
 
         if (device->buffer) {
                 free(device->buffer);