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atmel_lcdfb: disallow setting larger resolution than the framebuffer memory can handle

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Signed-off-by: Stanislaw Gruszka <[email protected]>
Acked-by: Nicolas Ferre <[email protected]>
Cc: Krzysztof Helt <[email protected]>
Cc: Haavard Skinnemoen <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Stanislaw Gruszka 2008-10-15 22:03:43 -07:00 • committed by Linus Torvalds
commit f928ac0a98
1 changed files with 7 additions and 0 deletions
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7
drivers/video/atmel_lcdfb.c
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@ -372,6 +372,13 @@ 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);