linux-kernel - [25/82] USB: mct_u232: fix broken close

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Message-Id: <20101119215640.810378408@clark.site>
Date:	Fri, 19 Nov 2010 13:55:46 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Johan Hovold <jhovold@...il.com>
Subject: [25/82] USB: mct_u232: fix broken close

2.6.35-stable review patch.  If anyone has any objections, please let us know.

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

From: Johan Hovold <jhovold@...il.com>

commit 92ca0dc5ee022e4c0e488177e1d8865a0778c6c2 upstream.

Fix regression introduced by commit
f26788da3b342099d2b02d99ba1cb7f154d6ef7b (USB: serial: refactor generic
close) which broke driver close().

This driver uses non-standard semantics for the read urb which makes the
generic close function fail to kill it (the read urb is actually an
interrupt urb and therefore bulk_in size is zero).

Reported-by: Eric Shattow "Eprecocious" <lucent@...il.com>
Tested-by: Eric Shattow "Eprecocious" <lucent@...il.com>
Signed-off-by: Johan Hovold <jhovold@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/usb/serial/mct_u232.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

--- a/drivers/usb/serial/mct_u232.c
+++ b/drivers/usb/serial/mct_u232.c
@@ -549,9 +549,12 @@ static void mct_u232_close(struct usb_se
 {
 	dbg("%s port %d", __func__, port->number);
 
-	usb_serial_generic_close(port);
-	if (port->serial->dev)
+	if (port->serial->dev) {
+		/* shutdown our urbs */
+		usb_kill_urb(port->write_urb);
+		usb_kill_urb(port->read_urb);
 		usb_kill_urb(port->interrupt_in_urb);
+	}
 } /* mct_u232_close */
 
 


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