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[PATCH 1/2] USB: symbolserial: Use usb_get_serial_port_data

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  [PATCH 1/2] USB: symbolserial: Use usb_get_serial_port_data Philipp Hachtmann <hachti@hachti.de> - 2015-08-17 17:50 +0200
    Re: [PATCH 1/2] USB: symbolserial: Use usb_get_serial_port_data Greg KH <gregkh@linuxfoundation.org> - 2015-08-17 18:10 +0200
      Re: [PATCH 1/2] USB: symbolserial: Use usb_get_serial_port_data Johan Hovold <johan@kernel.org> - 2015-08-17 20:10 +0200

#1208655 — [PATCH 1/2] USB: symbolserial: Use usb_get_serial_port_data

The driver used usb_get_serial_data(port->serial) which compiled but resulted
in a NULL pointer being returned (and subsequently used). I did not go deeper
into this but I guess this is a regression.

Signed-off-by: Philipp Hachtmann <hachti@hachti.de>
---
 drivers/usb/serial/symbolserial.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/serial/symbolserial.c b/drivers/usb/serial/symbolserial.c
index 8fceec7..6ed8044 100644
--- a/drivers/usb/serial/symbolserial.c
+++ b/drivers/usb/serial/symbolserial.c
@@ -94,7 +94,7 @@ exit:
 
 static int symbol_open(struct tty_struct *tty, struct usb_serial_port *port)
 {
-	struct symbol_private *priv = usb_get_serial_data(port->serial);
+	struct symbol_private *priv = usb_get_serial_port_data(port);
 	unsigned long flags;
 	int result = 0;
 
@@ -120,7 +120,7 @@ static void symbol_close(struct usb_serial_port *port)
 static void symbol_throttle(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
-	struct symbol_private *priv = usb_get_serial_data(port->serial);
+	struct symbol_private *priv = usb_get_serial_port_data(port);
 
 	spin_lock_irq(&priv->lock);
 	priv->throttled = true;
@@ -130,7 +130,7 @@ static void symbol_throttle(struct tty_struct *tty)
 static void symbol_unthrottle(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
-	struct symbol_private *priv = usb_get_serial_data(port->serial);
+	struct symbol_private *priv = usb_get_serial_port_data(port);
 	int result;
 	bool was_throttled;
 
-- 
2.1.4

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#1208681

On Mon, Aug 17, 2015 at 05:31:46PM +0200, Philipp Hachtmann wrote:
> The driver used usb_get_serial_data(port->serial) which compiled but resulted
> in a NULL pointer being returned (and subsequently used). I did not go deeper
> into this but I guess this is a regression.
> 
> Signed-off-by: Philipp Hachtmann <hachti@hachti.de>
> ---
>  drivers/usb/serial/symbolserial.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)

Doh, obviously no one has used this driver in a long time, thanks for
these patches...

Johan, mind if I take these directly?

thanks,

greg k-h
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#1208770

On Mon, Aug 17, 2015 at 09:06:15AM -0700, Greg Kroah-Hartman wrote:
> On Mon, Aug 17, 2015 at 05:31:46PM +0200, Philipp Hachtmann wrote:
> > The driver used usb_get_serial_data(port->serial) which compiled but resulted
> > in a NULL pointer being returned (and subsequently used). I did not go deeper
> > into this but I guess this is a regression.
> > 
> > Signed-off-by: Philipp Hachtmann <hachti@hachti.de>
> > ---
> >  drivers/usb/serial/symbolserial.c | 6 +++---
> >  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> Doh, obviously no one has used this driver in a long time, thanks for
> these patches...

Wow...

> Johan, mind if I take these directly?

Please do.

This one should be tagged:

Fixes: a85796ee5149 ("USB: symbolserial: move private-data allocation to
port_probe")
Cc: stable <stable@vger.kernel.org>	# v3.10

And for both patches:

Acked-by: Johan Hovold <johan@kernel.org>

Thanks,
Johan
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