Re: [PATCH 2/2] staging: media: tegra-video: add missing error checks in vi_tpg_fmts_bitmap_init()

[Dan Carpenter <error27@gmail.com>]

On Sun, Apr 12, 2026 at 10:48:08AM +0200, Alexandru Hossu wrote:
> tegra_get_format_idx_by_code() returns -1 when the requested format is
> not found in the SoC format table. vi_tpg_fmts_bitmap_init() does not
> check this return value before passing it to bitmap_set(). A negative
> index converted to unsigned would result in an out-of-bounds memory
> access, corrupting adjacent kernel memory.
> 
> Add WARN_ON() guards so that any future SoC addition or Kconfig change
> that exposes this path fails loudly rather than silently corrupting memory.
> 
> Signed-off-by: Alexandru Hossu <hossu.alexandru@gmail.com>
> ---

patch 1 is missing.  Also the little change log under the --- is missing.
https://staticthinking.wordpress.com/2022/07/27/how-to-send-a-v2-patch/
And I want you do change the commit message to say that it's not a real
life bugfix.

>  drivers/staging/media/tegra-video/vi.c | 16 ++++++++++++++--
>  1 file changed, 14 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/staging/media/tegra-video/vi.c b/drivers/staging/media/tegra-video/vi.c
> index afc7327ef318..d1d934e361f7 100644
> --- a/drivers/staging/media/tegra-video/vi.c
> +++ b/drivers/staging/media/tegra-video/vi.c
> @@ -1017,7 +1017,7 @@ static int tegra_channel_setup_ctrl_handler(struct tegra_vi_channel *chan)
>  }
>  
>  /* VI only support 2 formats in TPG mode */
> -static void vi_tpg_fmts_bitmap_init(struct tegra_vi_channel *chan)
> +static int vi_tpg_fmts_bitmap_init(struct tegra_vi_channel *chan)
>  {
>  	int index;
>  
> @@ -1025,12 +1025,22 @@ static void vi_tpg_fmts_bitmap_init(struct tegra_vi_channel *chan)
>  
>  	index = tegra_get_format_idx_by_code(chan->vi,
>  					     MEDIA_BUS_FMT_SRGGB10_1X10, 0);
> +	if (index < 0) {
> +		dev_err(chan->vi->dev, "format SRGGB10_1X10 not found\n");
> +		return -EINVAL;

Change tegra_get_format_idx_by_code() to return -EINVAL instead.

regards,
dan carpenter