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Date:   Mon, 12 Sep 2022 16:08:42 +0200
From:   Greg KH <gregkh@linuxfoundation.org>
To:     cgel.zte@gmail.com
Cc:     balbi@kernel.org, linux-usb@vger.kernel.org,
        linux-kernel@vger.kernel.org, Xu Panda <xu.panda@zte.com.cn>,
        Zeal Robot <zealci@zte.com.cn>
Subject: Re: [PATCH linux-next] USB: serial: keyspan_pda: remove the unneeded
 result variable
Message-ID: <Yx89armgxAEn61TL@kroah.com>
References: <20220912103700.18338-1-xu.panda@zte.com.cn>
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In-Reply-To: <20220912103700.18338-1-xu.panda@zte.com.cn>
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On Mon, Sep 12, 2022 at 10:37:01AM +0000, cgel.zte@gmail.com wrote:
> From: Xu Panda <xu.panda@zte.com.cn>
> 
> Return the usb_control_msg() directly instead of storing it in
> another redundant variable.
> 
> Reported-by: Zeal Robot <zealci@zte.com.cn>
> Signed-off-by: Xu Panda <xu.panda@zte.com.cn>
> ---
>  drivers/usb/serial/keyspan_pda.c | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/usb/serial/keyspan_pda.c b/drivers/usb/serial/keyspan_pda.c
> index 6fd15cd9e1eb..902675ac7f5c 100644
> --- a/drivers/usb/serial/keyspan_pda.c
> +++ b/drivers/usb/serial/keyspan_pda.c
> @@ -393,12 +393,10 @@ static int keyspan_pda_get_modem_info(struct usb_serial *serial,
>  static int keyspan_pda_set_modem_info(struct usb_serial *serial,
>                                       unsigned char value)
>  {
> -       int rc;
> -       rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
> -                            3, /* set pins */
> -                            USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_OUT,
> -                            value, 0, NULL, 0, 2000);
> -       return rc;
> +       return usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
> +                              3, /* set pins */
> +                              USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_OUT,
> +                              value, 0, NULL, 0, 2000);
>  }

Again, incorrect use of the usb_control_msg() return value.