On Sat, May 31, 2014 at 11:58 AM, Johan Hovold <jhovold@xxxxxxxxx> wrote:
> On Sat, May 31, 2014 at 10:14:01AM -0300, Peter Senna Tschudin wrote:
>> This patch remove variables that are initialized with a constant,
>> are never updated, and are only used as parameter of return.
>> Return the constant instead of using a variable.
>>
>> Verified by compilation only.
>>
>> The coccinelle script that find and fixes this issue is:
>> // <smpl>
>> @@
>> type T;
>> constant C;
>> identifier ret;
>> @@
>> - T ret = C;
>> ... when != ret
>> when strict
>> return
>> - ret
>> + C
>> ;
>> // </smpl>
>>
>> Signed-off-by: Peter Senna Tschudin <peter.senna@xxxxxxxxx>
>>
>> ---
>> drivers/usb/serial/kl5kusb105.c | 23 +----------------------
>> 1 file changed, 1 insertion(+), 22 deletions(-)
>>
>> diff --git a/drivers/usb/serial/kl5kusb105.c b/drivers/usb/serial/kl5kusb105.c
>> index d7440b7..2657c00 100644
>> --- a/drivers/usb/serial/kl5kusb105.c
>> +++ b/drivers/usb/serial/kl5kusb105.c
>> @@ -605,28 +605,7 @@ static int klsi_105_tiocmget(struct tty_struct *tty)
>> static int klsi_105_tiocmset(struct tty_struct *tty,
>> unsigned int set, unsigned int clear)
>> {
>> - int retval = -EINVAL;
>> -
>> -/* if this ever gets implemented, it should be done something like this:
>> - struct usb_serial *serial = port->serial;
>> - struct klsi_105_private *priv = usb_get_serial_port_data(port);
>> - unsigned long flags;
>> - int control;
>> -
>> - spin_lock_irqsave (&priv->lock, flags);
>> - if (set & TIOCM_RTS)
>> - priv->control_state |= TIOCM_RTS;
>> - if (set & TIOCM_DTR)
>> - priv->control_state |= TIOCM_DTR;
>> - if (clear & TIOCM_RTS)
>> - priv->control_state &= ~TIOCM_RTS;
>> - if (clear & TIOCM_DTR)
>> - priv->control_state &= ~TIOCM_DTR;
>> - control = priv->control_state;
>> - spin_unlock_irqrestore (&priv->lock, flags);
>> - retval = mct_u232_set_modem_ctrl(serial, control);
>> -*/
>> - return retval;
>> + return -EINVAL;
>
> Your patch does a bit more than what the description says, although
> removing this out-commented code would be perfectly fine.
Sorry for that, my fault.
>
> But please just remove the entire function (and the corresponding entry
> in the struct usb_serial_driver) and update the commit message.
Sent V2.
>
> Thanks,
> Johan
>
>> }
>>
>> module_usb_serial_driver(serial_drivers, id_table);
>>
--
Peter
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