Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull EFI fix from Ingo Molnar:
"Fix an EFI-fb regression that affects certain x86 systems"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
fbdev/efifb: Ignore framebuffer memmap entries that lack any memory types

drivers/video/fbdev/efifb.c

···
 		 * If the UEFI memory map covers the efifb region, we may only
 		 * remap it using the attributes the memory map prescribes.
 		 */
-		mem_flags |= EFI_MEMORY_WT | EFI_MEMORY_WB;
-		mem_flags &= md.attribute;
+		md.attribute &= EFI_MEMORY_UC | EFI_MEMORY_WC |
+				EFI_MEMORY_WT | EFI_MEMORY_WB;
+		if (md.attribute) {
+			mem_flags |= EFI_MEMORY_WT | EFI_MEMORY_WB;
+			mem_flags &= md.attribute;
+		}
 	}
 	if (mem_flags & EFI_MEMORY_WC)
 		info->screen_base = ioremap_wc(efifb_fix.smem_start,