From 050f32a35898c8ac8ac47322f21f0ec4928aa065 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Fri, 14 Jun 2013 09:56:20 +0200
Subject: [PATCH 4/8] usbredirhost: Use libusb_set_auto_detach_kernel_driver
 when available

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 usbredirhost/usbredirhost.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/usbredirhost/usbredirhost.c b/usbredirhost/usbredirhost.c
index 09745c2..0335b37 100644
--- a/usbredirhost/usbredirhost.c
+++ b/usbredirhost/usbredirhost.c
@@ -499,9 +499,13 @@ static int usbredirhost_claim(struct usbredirhost *host, int initial_claim)
     memset(host->alt_setting, 0, MAX_INTERFACES);
 
     host->claimed = 1;
+#if LIBUSBX_API_VERSION >= 0x01000102
+    libusb_set_auto_detach_kernel_driver(host->handle, 1);
+#endif
     for (i = 0; host->config && i < host->config->bNumInterfaces; i++) {
         n = host->config->interface[i].altsetting[0].bInterfaceNumber;
 
+#if LIBUSBX_API_VERSION < 0x01000102
         r = libusb_detach_kernel_driver(host->handle, n);
         if (r < 0 && r != LIBUSB_ERROR_NOT_FOUND
                   && r != LIBUSB_ERROR_NOT_SUPPORTED) {
@@ -509,6 +513,7 @@ static int usbredirhost_claim(struct usbredirhost *host, int initial_claim)
                   n, host->config->bConfigurationValue, libusb_error_name(r));
             return libusb_status_or_error_to_redir_status(host, r);
         }
+#endif
 
         r = libusb_claim_interface(host->handle, n);
         if (r < 0) {
@@ -534,6 +539,16 @@ static void usbredirhost_release(struct usbredirhost *host, int attach_drivers)
     if (!host->claimed)
         return;
 
+#if LIBUSBX_API_VERSION >= 0x01000102
+    /* We want to always do the attach ourselves because:
+       1) For compound interfaces such as usb-audio we must first release all
+          interfaces before we can attach the driver;
+       2) When releasing interfaces before calling libusb_set_configuration,
+          we don't want the kernel driver to get attached (our attach_drivers
+          parameter is 0 in this case). */
+    libusb_set_auto_detach_kernel_driver(host->handle, 0);
+#endif
+
     for (i = 0; host->config && i < host->config->bNumInterfaces; i++) {
         n = host->config->interface[i].altsetting[0].bInterfaceNumber;
 
-- 
1.8.3.1