Re: [PATCH 2/2] atmel_lcdfb: Disallow to set larger resolution than framebuffer memory can handle

[Nicolas Ferre <nicolas.ferre@atmel.com>]

Stanislaw Gruszka :
> Signed-off-by: Stanislaw Gruszka <stf_xl@wp.pl>
> CC: Nicolas Ferre <nicolas.ferre@atmel.com>

Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

> ---
>  drivers/video/atmel_lcdfb.c |    7 +++++++
>  1 files changed, 7 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/video/atmel_lcdfb.c b/drivers/video/atmel_lcdfb.c
> index 3376f35..5d6cf33 100644
> --- a/drivers/video/atmel_lcdfb.c
> +++ b/drivers/video/atmel_lcdfb.c
> @@ -342,6 +342,13 @@ static int atmel_lcdfb_check_var(struct fb_var_screeninfo *var,
>  	var->transp.offset = var->transp.length = 0;
>  	var->xoffset = var->yoffset = 0;
>  
> +	if (info->fix.smem_len) {
> +		unsigned int smem_len = (var->xres_virtual * var->yres_virtual
> +					 * ((var->bits_per_pixel + 7) / 8));
> +		if (smem_len > info->fix.smem_len)
> +			return -EINVAL;
> +	}
> +
>  	/* Saturate vertical and horizontal timings at maximum values */
>  	var->vsync_len = min_t(u32, var->vsync_len,
>  			(ATMEL_LCDC_VPW >> ATMEL_LCDC_VPW_OFFSET) + 1);


-- 
Nicolas Ferre


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