Commit c4d5b6ee authored by Geert Uytterhoeven's avatar Geert Uytterhoeven
Browse files

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: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
Tested-by: default avatarMichael Schmitz <schmitzmic@gmail.com>
Link: https://lore.kernel.org/r/20220128173006.1713210-1-geert@linux-m68k.org
parent 91d7b75a

arch/m68k/mm/fault.c

+0 −2
Original line number Diff line number Diff line
@@ -93,8 +93,6 @@ int do_page_fault(struct pt_regs *regs, unsigned long address, 
	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))