From: Ben Hutchings <ben@decadent.org.uk>
Date: Sun, 12 Feb 2012 06:02:43 +0000 (+0000)
Subject: cdc-wdm: Don't clear WDM_READ unless entire read buffer is emptied
X-Git-Tag: v3.3.1~142
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=078ed3398254fa4217ac8b79265b6f3772ba193e;p=thirdparty%2Fkernel%2Fstable.git

cdc-wdm: Don't clear WDM_READ unless entire read buffer is emptied

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>
---

diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index 14278c4a35738..2f085fbbaf250 100644
--- 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);
 	}