drm/vmwgfx: Fix a width / pitch mismatch on framebuffer updates

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commit a50e2bf5a0 upstream.

When the framebuffer is a vmwgfx dma buffer and a proxy surface is
created, the vmw_kms_update_proxy() function requires that the proxy
surface width and the framebuffer pitch are compatible, otherwise
display corruption occurs as seen in gnome-shell/native with software
3D. Since the framebuffer pitch is determined by user-space, allocate
a proxy surface the width of which is based on the framebuffer pitch
rather than on the framebuffer width.

Reported-by: Raphael Hertzog <buxy@kali.org>
Tested-by:  Mati Aharoni <muts@kali.org>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Thomas Hellstrom 2016-01-08 20:29:40 +01:00 • committed by Greg Kroah-Hartman

parent a4de54fb20

commit 15ec2c4c10

1 changed files with 5 additions and 1 deletions

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drivers/gpu/drm/vmwgfx/vmwgfx_kms.c

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