From: Oliver Neukum <oliver@neukum.org>
Date: Thu, 1 Oct 2009 12:54:46 +0000 (+0200)
Subject: USB: visor: fix trivial accounting bug in visor driver
X-Git-Tag: v3.0~7202^2~8
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4c9fde9b860ccb27a7b026844eb3ef64c77e5a49;p=platform%2Fkernel%2Flinux-amlogic.git

USB: visor: fix trivial accounting bug in visor driver

usb:usbserial:visor: fix accounting in error case

data not pushed to the tty layer due to an error mustn't be counted

Signed-off-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/usb/serial/visor.c b/drivers/usb/serial/visor.c
index 1aa5d20..8e2d6dd 100644
--- a/drivers/usb/serial/visor.c
+++ b/drivers/usb/serial/visor.c
@@ -513,7 +513,8 @@ static void visor_read_bulk_callback(struct urb *urb)
 			tty_kref_put(tty);
 		}
 		spin_lock(&priv->lock);
-		priv->bytes_in += available_room;
+		if (tty)
+			priv->bytes_in += available_room;
 
 	} else {
 		spin_lock(&priv->lock);