RE: [PATCH v3 4/4] hyperv-fb: kick off efifb early

-----Original Message-----
From: Gerd Hoffmann [mailto:kraxel@redhat.com]
Sent: Monday, February 24, 2014 8:17 AM
To: linux-fbdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org; gregkh@linuxfoundation.org; KY Srinivasan;
Abhishek Gupta (LIS); Haiyang Zhang; jasowang@redhat.com;
tomi.valkeinen@ti.com; devel@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 <kraxel@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);