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References: <20210821164859.4351-1-martin@kaiser.cx> <20210821164859.4351-8-martin@kaiser.cx>
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From:   Phillip Potter <phil@philpotter.co.uk>
Date:   Sat, 21 Aug 2021 18:47:04 +0100
Message-ID: <CAA=Fs0nuut-+dqCMOB-QU0j7ecUV8y5b42cmsj36H9FAN5Y4xg@mail.gmail.com>
Subject: Re: [PATCH 08/10] staging: r8188eu: clean up the usb_writeN
To:     Martin Kaiser <martin@kaiser.cx>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Larry Finger <Larry.Finger@lwfinger.net>,
        Dan Carpenter <dan.carpenter@oracle.com>,
        Michael Straube <straube.linux@gmail.com>,
        linux-staging@lists.linux.dev,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Sat, 21 Aug 2021 at 17:50, Martin Kaiser <martin@kaiser.cx> wrote:
>
> Remove unnecessary variables, check the length.
>
> Signed-off-by: Martin Kaiser <martin@kaiser.cx>
> ---
>  drivers/staging/r8188eu/hal/usb_ops_linux.c | 15 +++++----------
>  1 file changed, 5 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/staging/r8188eu/hal/usb_ops_linux.c b/drivers/staging/r8188eu/hal/usb_ops_linux.c
> index e01f1ac19596..5408383ccec3 100644
> --- a/drivers/staging/r8188eu/hal/usb_ops_linux.c
> +++ b/drivers/staging/r8188eu/hal/usb_ops_linux.c
> @@ -151,20 +151,15 @@ static int usb_write32(struct intf_hdl *pintfhdl, u32 addr, u32 val)
>
>  static int usb_writeN(struct intf_hdl *pintfhdl, u32 addr, u32 length, u8 *pdata)
>  {
> -       u16 wvalue;
> -       u16 len;
> +       u16 wvalue = (u16)(addr & 0x0000ffff);
>         u8 buf[VENDOR_CMD_MAX_DATA_LEN] = {0};
> -       int ret;
> -
>
> +       if (length > VENDOR_CMD_MAX_DATA_LEN)
> +               return -EINVAL;
>
> -       wvalue = (u16)(addr & 0x0000ffff);
> -       len = length;
> -       memcpy(buf, pdata, len);
> +       memcpy(buf, pdata, length);
>
> -       ret = usbctrl_vendorreq(pintfhdl, wvalue, buf, len, REALTEK_USB_VENQT_WRITE);
> -
> -       return ret;
> +       return usbctrl_vendorreq(pintfhdl, wvalue, buf, (length & 0xffff), REALTEK_USB_VENQT_WRITE);
>  }
>
>  static void interrupt_handler_8188eu(struct adapter *adapt, u16 pkt_len, u8 *pbuf)
> --
> 2.20.1
>

Acked-by: Phillip Potter <phil@philpotter.co.uk>

Regards,
Phil