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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
This commit is contained in:
Linus Torvalds 2019-05-19 10:33:26 -07:00
parent 1335d9a1fb f8585539df
commit 39feaa3ff4
1 changed files with 6 additions and 2 deletions
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8
drivers/video/fbdev/efifb.c
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@ -477,8 +477,12 @@ static int efifb_probe(struct platform_device *dev)
* 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,