Commit ca696901 authored by Oleksandr Tyshchenko's avatar Oleksandr Tyshchenko Committed by Juergen Gross
Browse files

drm/xen: Add missing VM_DONTEXPAND flag in mmap callback 



With Xen PV Display driver in use the "expected" VM_DONTEXPAND flag
is not set (neither explicitly nor implicitly), so the driver hits
the code path in drm_gem_mmap_obj() which triggers the WARNING.

Signed-off-by: default avatarOleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Reviewed-by: default avatarOleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Link: https://lore.kernel.org/r/1652104303-5098-1-git-send-email-olekstysh@gmail.com


Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
parent ecb6237f

drivers/gpu/drm/xen/xen_drm_front_gem.c

+1 −1
Original line number Diff line number Diff line
@@ -71,7 +71,7 @@ static int xen_drm_front_gem_object_mmap(struct drm_gem_object *gem_obj, 
	 * the whole buffer.

	 */

	vma->vm_flags &= ~VM_PFNMAP;

	vma->vm_flags |= VM_MIXEDMAP;

	vma->vm_flags |= VM_MIXEDMAP | VM_DONTEXPAND;

	vma->vm_pgoff = 0;



	/*