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sna: Mark upload from SHM segment as read-only 

As this may be mapped by the Xserver using a read-only SHM segment, we
are forced to treat it always as read-only. And this being X, that it is
using a SHM segment is opaque to the driver. Fantastic middlelayer.

This was incorrectly removed in
commit e680e54eab
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Wed Jun 11 10:48:26 2014 +0100

    sna: Ignore setting read-only for temporary userptr maps

Also let's not forget the ShmPutImage -> CopyArea path.

Reported-by: Christoph Haag <haagch.christoph@googlemail.com>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=78411
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2014-06-19 20:39:59 +01:00
parent df89b49411
commit 113a8b9be9
1 changed files with 1 additions and 1 deletions
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2
src/sna/sna_accel.c
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@ -6368,7 +6368,7 @@ discard_cow:
src_bo = kgem_create_map(&sna->kgem,
src_pixmap->devPrivate.ptr,
src_pixmap->devKind * src_pixmap->drawable.height,
false);
true);
if (src_bo) {
src_bo->pitch = src_pixmap->devKind;
kgem_bo_mark_unreusable(src_bo);