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x86: Sanity test on vesa parameters before setting up kernel screen_info 

We should not set up kernel screen_info when the vesa parameters are
insane, otherwise kernel will panic.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2015-07-30 03:49:13 -07:00 committed by Simon Glass
parent a2eb65fcad
commit 1e7a047304
1 changed files with 4 additions and 0 deletions
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4
drivers/pci/pci_rom.c
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@ -235,6 +235,10 @@ void setup_video(struct screen_info *screen_info)
#ifdef CONFIG_FRAMEBUFFER_SET_VESA_MODE
struct vesa_mode_info *vesa = &mode_info.vesa;
/* Sanity test on VESA parameters */
if (!vesa->x_resolution || !vesa->y_resolution)
return;
screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB;
screen_info->lfb_width = vesa->x_resolution;