---

yaml --- r: 67831 b: refs/heads/master c: d74d4a6 h: refs/heads/master i: 67829: e5fce60 67827: da9aedf 67823: ba3cfbb v: v3
git-mirror · Oct 12, 2007 · b804c57 · b804c57
1 parent 80d54ff
commit b804c57
Show file tree

Hide file tree

Showing 2 changed files with 5 additions and 3 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e9df41c5c5899259541dc928872cad4d07b82076
+refs/heads/master: d74d4a69dc1cc7ddc0eabb9c9f1e45005e2984eb
diff --git a/trunk/drivers/usb/core/message.c b/trunk/drivers/usb/core/message.c
@@ -1173,6 +1173,7 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate)
 	struct usb_host_interface *alt;
 	int ret;
 	int manual = 0;
+	int changed;
 
 	if (dev->state == USB_STATE_SUSPENDED)
 		return -EHOSTUNREACH;
@@ -1212,7 +1213,8 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate)
 	 */
 
 	/* prevent submissions using previous endpoint settings */
-	if (device_is_registered(&iface->dev))
+	changed = (iface->cur_altsetting != alt);
+	if (changed && device_is_registered(&iface->dev))
 		usb_remove_sysfs_intf_files(iface);
 	usb_disable_interface(dev, iface);
 
@@ -1249,7 +1251,7 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate)
 	 * (Likewise, EP0 never "halts" on well designed devices.)
 	 */
 	usb_enable_interface(dev, iface);
-	if (device_is_registered(&iface->dev))
+	if (changed && device_is_registered(&iface->dev))
 		usb_create_sysfs_intf_files(iface);
 
 	return 0;