---

yaml --- r: 25742 b: refs/heads/master c: 89ccbdc h: refs/heads/master v: v3
git-mirror · Apr 14, 2006 · 87908f2 · 87908f2
1 parent 19c46a3
commit 87908f2
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Showing 3 changed files with 15 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4d45e21867bee51e3bb42e95bc2929231d7c8192
+refs/heads/master: 89ccbdc91bc5a433fa256c0136fbe181d7c5d474
diff --git a/trunk/drivers/usb/core/Kconfig b/trunk/drivers/usb/core/Kconfig
@@ -99,4 +99,11 @@ config USB_OTG_WHITELIST
 	  normal Linux-USB hosts do (other than the warning), and is
 	  convenient for many stages of product development.
 
+config USB_OTG_BLACKLIST_HUB
+	bool "Disable external hubs"
+	depends on USB_OTG
+	help
+	  If you say Y here, then Linux will refuse to enumerate
+	  external hubs.  OTG hosts are allowed to reduce hardware
+	  and software costs by not supporting external hubs.
 
diff --git a/trunk/drivers/usb/core/hub.c b/trunk/drivers/usb/core/hub.c
@@ -836,6 +836,13 @@ static int hub_probe(struct usb_interface *intf, const struct usb_device_id *id)
 	desc = intf->cur_altsetting;
 	hdev = interface_to_usbdev(intf);
 
+#ifdef	CONFIG_USB_OTG_BLACKLIST_HUB
+	if (hdev->parent) {
+		dev_warn(&intf->dev, "ignoring external hub\n");
+		return -ENODEV;
+	}
+#endif
+
 	/* Some hubs have a subclass of 1, which AFAICT according to the */
 	/*  specs is not defined, but it works */
 	if ((desc->desc.bInterfaceSubClass != 0) &&