Re: [PATCH] drm/mediatek: cleanup coding style in mediatek a bit

[Chun-Kuang Hu]

Hi, Bernard:

Bernard Zhao <bernard@xxxxxxxx> æ 2020å4æ27æ éä äå3:53åéï
>
> This code change is to make code bit more readable.
> Optimise array size align to HDMI macro define.
> Add check if len is overange.

One patch should just do one thing, but this do three things.
So break this into three patches.

Regards,
Chun-Kuang.

>
> Signed-off-by: Bernard Zhao <bernard@xxxxxxxx>
> ---
>  drivers/gpu/drm/mediatek/mtk_hdmi.c | 22 +++++++++++-----------
>  1 file changed, 11 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> index ff43a3d80410..40fb5154ed5d 100644
> --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> @@ -311,15 +311,15 @@ static void mtk_hdmi_hw_send_info_frame(struct mtk_hdmi *hdmi, u8 *buffer,
>         u8 checksum;
>         int ctrl_frame_en = 0;
>
> -       frame_type = *buffer;
> -       buffer += 1;
> -       frame_ver = *buffer;
> -       buffer += 1;
> -       frame_len = *buffer;
> -       buffer += 1;
> -       checksum = *buffer;
> -       buffer += 1;
> +       frame_type = *buffer++;
> +       frame_ver = *buffer++;
> +       frame_len = *buffer++;
> +       checksum = *buffer++;
>         frame_data = buffer;
> +       if ((frame_len + HDMI_INFOFRAME_HEADER_SIZE) > len) {
> +               dev_err(hdmi->dev, "Wrong frame len: %d\n", frame_len;
> +               return;
> +       }
>
>         dev_dbg(hdmi->dev,
>                 "frame_type:0x%x,frame_ver:0x%x,frame_len:0x%x,checksum:0x%x\n",
> @@ -982,7 +982,7 @@ static int mtk_hdmi_setup_avi_infoframe(struct mtk_hdmi *hdmi,
>                                         struct drm_display_mode *mode)
>  {
>         struct hdmi_avi_infoframe frame;
> -       u8 buffer[17];
> +       u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AVI_INFOFRAME_SIZE];
>         ssize_t err;
>
>         err = drm_hdmi_avi_infoframe_from_display_mode(&frame,
> @@ -1008,7 +1008,7 @@ static int mtk_hdmi_setup_spd_infoframe(struct mtk_hdmi *hdmi,
>                                         const char *product)
>  {
>         struct hdmi_spd_infoframe frame;
> -       u8 buffer[29];
> +       u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_SPD_INFOFRAME_SIZE];
>         ssize_t err;
>
>         err = hdmi_spd_infoframe_init(&frame, vendor, product);
> @@ -1031,7 +1031,7 @@ static int mtk_hdmi_setup_spd_infoframe(struct mtk_hdmi *hdmi,
>  static int mtk_hdmi_setup_audio_infoframe(struct mtk_hdmi *hdmi)
>  {
>         struct hdmi_audio_infoframe frame;
> -       u8 buffer[14];
> +       u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AUDIO_INFOFRAME_SIZE];
>         ssize_t err;
>
>         err = hdmi_audio_infoframe_init(&frame);
> --
> 2.26.2
>
>
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