From e9b10953edbccd3744e039ffc060ab2692f17856 Mon Sep 17 00:00:00 2001 From: Matthew Garrett Date: Fri, 27 Jul 2012 17:20:49 -0400 Subject: [PATCH 2/2] x86, EFI: Calculate the EFI framebuffer size instead of trusting the firmware Seth Forshee reported that his system was reporting that the EFI framebuffer stretched from 0x90010000-0xb0010000 despite the GPU's BAR only covering 0x90000000-0x9ffffff. It's safer to calculate this value from the pixel stride and screen height (values we already depend on) rather than face potential problems with resource allocation later on. Signed-off-by: Matthew Garrett Tested-by: Seth Forshee Signed-off-by: Matt Fleming --- arch/x86/boot/compressed/eboot.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c index bbd83b9..c760e07 100644 --- a/arch/x86/boot/compressed/eboot.c +++ b/arch/x86/boot/compressed/eboot.c @@ -331,7 +331,6 @@ static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto, si->lfb_width = width; si->lfb_height = height; si->lfb_base = fb_base; - si->lfb_size = fb_size; si->pages = 1; if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) { @@ -379,6 +378,8 @@ static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto, si->rsvd_pos = 0; } + si->lfb_size = si->lfb_linelength * si->lfb_height; + si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS; free_handle: -- 1.7.12.1