releases/3.0.27/cdc-wdm-don-t-clear-wdm_read-unless-entire-read-buffer-is-emptied.patch

From b7a205545345578712611106b371538992e142ff Mon Sep 17 00:00:00 2001
From: Ben Hutchings <ben@decadent.org.uk>
Date: Sun, 12 Feb 2012 06:02:43 +0000
Subject: cdc-wdm: Don't clear WDM_READ unless entire read buffer is emptied
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Ben Hutchings <ben@decadent.org.uk>

commit b7a205545345578712611106b371538992e142ff upstream.

The WDM_READ flag is cleared later iff desc->length is reduced to 0.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Tested-by: Bjørn Mork <bjorn@mork.no>
Cc: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/class/cdc-wdm.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -457,7 +457,6 @@ retry:
 			spin_unlock_irq(&desc->iuspin);
 			goto retry;
 		}
-		clear_bit(WDM_READ, &desc->flags);
 		cntr = desc->length;
 		spin_unlock_irq(&desc->iuspin);
 	}