> -----Original Message-----
> From: Gerd Hoffmann [mailto:kra...@redhat.com]
> Sent: Monday, February 24, 2014 8:17 AM
> To: linux-fb...@vger.kernel.org
> Cc: linux-ker...@vger.kernel.org; gre...@linuxfoundation.org; KY Srinivasan;
> Abhishek Gupta (LIS); Haiyang Zhang; jasow...@redhat.com;
> tomi.valkei...@ti.com; de...@linuxdriverproject.org; Gerd Hoffmann; Jean-
> Christophe Plagniol-Villard
> Subject: [PATCH v3 4/4] hyperv-fb: kick off efifb early
> 
> Remove firmware framebuffer before initializing hyperv-fb.  Needed
> on gen2 virtual machines.   Letting register_framebuffer handle the
> switchover results in efifb still being active while hyperv graphics are
> initialized, which in turn can make the linux kernel hang.
> 
> Signed-off-by: Gerd Hoffmann <kra...@redhat.com>
> ---
>  drivers/video/hyperv_fb.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/video/hyperv_fb.c b/drivers/video/hyperv_fb.c index
> 135d8cd..a570836 100644
> --- a/drivers/video/hyperv_fb.c
> +++ b/drivers/video/hyperv_fb.c
> @@ -683,6 +683,7 @@ static int hvfb_getmem(struct fb_info *info)
>               info->apertures->ranges[0].base = pci_resource_start(pdev, 0);
>               info->apertures->ranges[0].size = pci_resource_len(pdev, 0);
>       }
> +     remove_conflicting_framebuffers(info->apertures, "hyperv-fb", false);

Please use KBUILD_MODNAME, so that the naming is consistent.

Thanks,
- Haiyang

> 
>       info->fix.smem_start = par->mem.start;
>       info->fix.smem_len = screen_fb_size;
> --
> 1.8.3.1

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