RE: [PATCH 1/2] hyperv-fb: add pci stub

-----Original Message-----
From: linux-fbdev-owner@vger.kernel.org [mailto:linux-fbdev-
owner@vger.kernel.org] On Behalf Of Gerd Hoffmann
Sent: Wednesday, October 2, 2013 7:55 AM
Cc: Gerd Hoffmann; KY Srinivasan; Haiyang Zhang; Jean-Christophe Plagniol-
Villard; Tomi Valkeinen; open list:Hyper-V CORE AND...; open
list:FRAMEBUFFER LAYER; open list
Subject: [PATCH 1/2] hyperv-fb: add pci stub

This patch adds a pci stub driver to hyper-fb.  The hyperv framebuffer driver
will bind to the pci device then, so linux kernel and userspace know there is a
proper kernel driver for the device active.  lspci shows this for example:

[root@dhcp231 ~]# lspci -vs8
00:08.0 VGA compatible controller: Microsoft Corporation Hyper-V virtual
VGA (prog-if 00 [VGA controller])
        Flags: bus master, fast devsel, latency 0, IRQ 11
        Memory at f8000000 (32-bit, non-prefetchable) [sizedM]
        Expansion ROM at <unassigned> [disabled]
        Kernel driver in use: hyperv_fb

Another effect is that the xorg vesa driver will not attach to the device and
thus the Xorg server will automatically use the fbdev driver instead.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

Acked-by: Haiyang Zhang <haiyangz@microsoft.com>

Thank you for fixing this!

- Haiyang