allow concurrent access to the cable

[usb-driver] / usb-driver.c

diff --git a/usb-driver.c b/usb-driver.c
index d38da3e4dfdc2bf8a5a4321beec0e7cff41b14c5..8558c6af7d9cb74763f629fc42db0400ba43be17 100644 (file)
--- a/usb-driver.c
+++ b/usb-driver.c
@@ -37,21 +37,22 @@
 #include <signal.h>
 #include <pthread.h>
 #include <errno.h>
+#include <inttypes.h>
 #include "usb-driver.h"
 
 static int (*ioctl_func) (int, int, void *) = NULL;
-static int windrvrfd = 0;
-FILE *modulesfp;
+static int windrvrfd = -1;
+FILE *modulesfp = NULL;
 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;
 
 #define NO_WINDRVR 1
-#undef DEBUG
 
 #ifdef DEBUG
 #define DPRINTF(format, args...) fprintf(stderr, format, ##args)
@@ -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);
@@ -660,7 +662,7 @@ int ioctl(int fd, int request, ...) {
        argp = va_arg (args, void *);
        va_end (args);
 
-       if (windrvrfd && (fd == windrvrfd))
+       if (fd == windrvrfd)
                ret = do_wdioctl(fd, request, argp);
        else
                ret = (*ioctl_func) (fd, request, argp);
@@ -710,9 +712,17 @@ int close(int fd) {
        if (!func)
                func = (int (*) (int)) dlsym(RTLD_NEXT, "close");
        
-       if (fd == windrvrfd) {
+       if (fd == windrvrfd && windrvrfd >= 0) {
                DPRINTF("close windrvrfd\n");
-               windrvrfd = 0;
+               if (usbinterface >= 0)
+                       usb_release_interface(usb_devhandle, usbinterface);
+
+               if (usb_devhandle)
+                       usb_close(usb_devhandle);
+
+               usb_devhandle = NULL;
+               usbinterface = -1;
+               windrvrfd = -1;
        }
 
        return (*func) (fd);