USB: add a blacklist for devices that can't handle some things we throw at them.
This adds a blacklist to the USB core to handle some autosuspend and
string issues that devices have.
Originally written by Oliver, but hacked up a lot by Greg.
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/include/linux/usb.h b/include/linux/usb.h
index a8e8d1e..37e522e 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -388,6 +388,7 @@
struct usb_device *children[USB_MAXCHILDREN];
int pm_usage_cnt; /* usage counter for autosuspend */
+ u32 quirks; /* quirks of the whole device */
#ifdef CONFIG_PM
struct delayed_work autosuspend; /* for delayed autosuspends */
struct mutex pm_mutex; /* protects PM operations */
diff --git a/include/linux/usb/quirks.h b/include/linux/usb/quirks.h
new file mode 100644
index 0000000..6bac8fa
--- /dev/null
+++ b/include/linux/usb/quirks.h
@@ -0,0 +1,11 @@
+/*
+ * This file holds the definitions of quirks found in USB devices.
+ * Only quirks that affect the whole device, not an interface,
+ * belong here.
+ */
+
+/* device must not be autosuspended */
+#define USB_QUIRK_NO_AUTOSUSPEND 0x00000001
+
+/* string descriptors must not be fetched using a 255-byte read */
+#define USB_QUIRK_STRING_FETCH_255 0x00000002