m68k: mm: Remove check for VM_IO to fix deferred I/O

When an application accesses a mapped frame buffer backed by deferred
I/O, it receives a segmentation fault.  Fix this by removing the check
for VM_IO in do_page_fault().

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Link: https://lore.kernel.org/r/20220128173006.1713210-1-geert@linux-m68k.org

diff --git a/arch/m68k/mm/fault.c b/arch/m68k/mm/fault.c
index 1493cf5eac1e7a3931c068ed6b42bdc8b0b249d4..71aa9f6315dc8028dcb17243d6e63df0068119ec 100644 (file)
--- a/arch/m68k/mm/fault.c
+++ b/arch/m68k/mm/fault.c
@@ -93,8 +93,6 @@ retry:
        vma = find_vma(mm, address);
        if (!vma)
                goto map_err;
-       if (vma->vm_flags & VM_IO)
-               goto acc_err;
        if (vma->vm_start <= address)
                goto good_area;
        if (!(vma->vm_flags & VM_GROWSDOWN))