diff --git a/drivers/video/fbdev/efifb.c b/drivers/video/fbdev/efifb.c index 9e529cc2b4ffd1bee145ef1584ed7ff546ba0a8b..9f39f0c360e0c00affa5837213b3db76c7ef9742 100644 --- a/drivers/video/fbdev/efifb.c +++ b/drivers/video/fbdev/efifb.c @@ -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,