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Re: [PATCH] drm/xen: Add missing VM_DONTEXPAND flag in mmap callback

To: Oleksandr Tyshchenko <olekstysh@xxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, dri-devel@xxxxxxxxxxxxxxxxxxxxx
From: Juergen Gross <jgross@xxxxxxxx>
Date: Thu, 23 Jun 2022 15:01:22 +0200
Cc: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>, Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>, David Airlie <airlied@xxxxxxxx>, Daniel Vetter <daniel@xxxxxxxx>
Delivery-date: Thu, 23 Jun 2022 13:01:25 +0000
List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 09.05.22 15:51, Oleksandr Tyshchenko wrote:

From: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>

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: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>


Pushed to xen/tip.git for-linus-5.19a


Juergen

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