allow concurrent access to the cable

diff --git a/usb-driver.c b/usb-driver.c
index 5a5a1479d1afc66e8231a4be24b67234fcbf3ec0..8558c6af7d9cb74763f629fc42db0400ba43be17 100644 (file)
--- a/usb-driver.c
+++ b/usb-driver.c
@@ -47,6 +47,7 @@ static int modules_read = 0;
 static struct usb_bus *busses = NULL;
 static struct usb_device *usbdevice;
 static usb_dev_handle *usb_devhandle = NULL;
+static int usbinterface = -1;
 static unsigned long card_type;
 static int ints_enabled = 0;
 static pthread_mutex_t int_wait = PTHREAD_MUTEX_INITIALIZER;
@@ -382,6 +383,7 @@ int do_wdioctl(int fd, unsigned int request, unsigned char *wdioctl) {
                                        ret = usb_claim_interface(usb_devhandle, usbdevice->config[0].interface[usi->dwInterfaceNum].altsetting[usi->dwAlternateSetting].bInterfaceNumber);
                                        if (!ret) {
                                                if(!ret) {
+                                                       usbinterface = usbdevice->config[0].interface[usi->dwInterfaceNum].altsetting[usi->dwAlternateSetting].bInterfaceNumber;
                                                        ret = usb_set_altinterface(usb_devhandle, usi->dwAlternateSetting);
                                                        if (ret)
                                                                fprintf(stderr, "usb_set_altinterface: %d\n", ret);
@@ -712,6 +714,14 @@ int close(int fd) {
        
        if (fd == windrvrfd && windrvrfd >= 0) {
                DPRINTF("close windrvrfd\n");
+               if (usbinterface >= 0)
+                       usb_release_interface(usb_devhandle, usbinterface);
+
+               if (usb_devhandle)
+                       usb_close(usb_devhandle);
+
+               usb_devhandle = NULL;
+               usbinterface = -1;
                windrvrfd = -1;
        }