[2/3] usbtouchscreen: Implement runtime power management

Commit Message

Oliver Neukum June 8, 2010, 2:12 p.m. UTC

None

Patch

diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h
index cd88220..b070549 100644
--- a/drivers/usb/core/usb.h
+++ b/drivers/usb/core/usb.h
@@ -124,6 +124,18 @@  static inline int is_usb_device_driver(struct device_driver *drv)
 			for_devices;
 }
 
+/* translate USB error codes to codes user space understands */
+static inline int usb_translate_errors(int error_code)
+{
+	switch (error_code) {
+	case 0:
+	case -ENOMEM:
+	case -ENODEV:
+		return error_code;
+	default:
+		return -EIO;
+	}
+}
 
 /* for labeling diagnostics */
 extern const char *usbcore_name;