linux-kernel - [ 034/175] cdc-wdm: Dont clear WDM_READ unless entire read buffer is emptied

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Message-Id: <20120330194830.989779860@linuxfoundation.org>
Date:	Fri, 30 Mar 2012 12:48:59 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Ben Hutchings <ben@...adent.org.uk>,
	Bjørn Mork <bjorn@...k.no>,
	Oliver Neukum <oliver@...kum.org>
Subject: [ 034/175] cdc-wdm: Dont clear WDM_READ unless entire read buffer is emptied

3.3-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ben Hutchings <ben@...adent.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@...adent.org.uk>
Tested-by: Bjørn Mork <bjorn@...k.no>
Cc: Oliver Neukum <oliver@...kum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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);
 	}


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