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From: Hans Petter Selasky <hselasky@FreeBSD.org>
To: Perforce Change Reviews <perforce@FreeBSD.org>
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Subject: PERFORCE change 132098 for review
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http://perforce.freebsd.org/chv.cgi?CH=132098

Change 132098 by hselasky@hselasky_laptop001 on 2007/12/30 14:24:09

	
	"usb_control_msg" should return the actual
	transfer length in case of success.

Affected files ...

.. //depot/projects/usb/src/sys/dev/usb/usb_compat_linux.c#21 edit

Differences ...

==== //depot/projects/usb/src/sys/dev/usb/usb_compat_linux.c#21 (text+ko) ====

@@ -577,12 +577,20 @@
 	return (err);
 }
 
-/* The following function performs a control transfer sequence one any
+/*------------------------------------------------------------------------*
+ *	usb_control_msg
+ *
+ * The following function performs a control transfer sequence one any
  * control, bulk or interrupt endpoint, specified by "uhe". A control
  * transfer means that you transfer an 8-byte header first followed by
  * a data-phase as indicated by the 8-byte header. The "timeout" is
  * given in milliseconds.
- */
+ *
+ * Return values:
+ *   0: Success
+ * < 0: Failure
+ * > 0: Acutal length
+ *------------------------------------------------------------------------*/
 int32_t
 usb_control_msg(struct usb_device *dev, struct usb_host_endpoint *uhe,
     uint8_t request, uint8_t requesttype,
@@ -696,6 +704,9 @@
 	}
 	usb_free_urb(urb);
 
+	if (err == 0) {
+		err = actlen;
+	}
 	return (err);
 }