http://lists.freedesktop.org/archives/intel-gfx/2009-February/001313.html
--- a/drivers/gpu/drm/i915/i915_suspend.c.orig 2009-02-18 22:59:19.000000000 -0500
+++ b/drivers/gpu/drm/i915/i915_suspend.c 2009-02-18 22:59:58.000000000 -0500
@@ -28,6 +28,7 @@
#include "drm.h"
#include "i915_drm.h"
#include "i915_drv.h"
+#include <drm/drm_crtc_helper.h>
static bool i915_pipe_enabled(struct drm_device *dev, enum pipe pipe)
{
@@ -519,6 +520,8 @@
i915_restore_vga(dev);
+ drm_helper_resume_force_mode(dev);
+
return 0;
}
From f5192bce8be69e5b33d7579bc282fef4d673e2c1 Mon Sep 17 00:00:00 2001
From: Lubomir Rintel <lkundrak@v3.sk>
Date: Sun, 15 Mar 2009 13:55:55 +0100
Subject: [PATCH] Fix i915 nomodeset NULL deref. during PM resume
drm_helper_resume_force_mode() would crash while attempting to
iterate through crtc_list, which is uninitialized when is modesetting
disabled.
---
drivers/gpu/drm/i915/i915_suspend.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c
index ef5fb6e..b138032 100644
--- a/drivers/gpu/drm/i915/i915_suspend.c
+++ b/drivers/gpu/drm/i915/i915_suspend.c
@@ -520,7 +520,8 @@ int i915_restore_state(struct drm_device *dev)
i915_restore_vga(dev);
- drm_helper_resume_force_mode(dev);
+ if (drm_core_check_feature(dev, DRIVER_MODESET))
+ drm_helper_resume_force_mode(dev);
return 0;
}
--
1.6.2