linux-kernel - Re: Oops in i915 intel_init_clock

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20110615133256.113293a0@jbarnes-desktop>
Date:	Wed, 15 Jun 2011 13:32:56 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Keith Packard <keithp@...thp.com>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	dri-devel@...ts.freedesktop.org
Subject: Re: Oops in i915 intel_init_clock_gating

On Wed, 15 Jun 2011 16:08:51 -0400 (EDT)
Alan Stern <stern@...land.harvard.edu> wrote:

> The problem of dev_priv->display.init_clock_gating not getting set is 
> still present in 3.0-rc3.  On my system this happens because 
> intel_init_display() never gets called in the first place.
> 
> AFAICT, the normal calling sequence during driver initialization is:
> 
> 	i915_driver_load() -> i915_load_modeset_init() ->
> 		intel_modeset_init() -> intel_init_display().
> 
> But in my case the call to i915_load_modeset_init() doesn't occur 
> because drm_core_check_feature(dev, DRIVER_MODESET) is False.

Ouch, a non-KMS config.  Any reason you can't use KMS?

This patch should help at any rate.

-- 
Jesse Barnes, Intel Open Source Technology Center

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 0defd42..a1a28fb 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -429,6 +429,9 @@ static int i915_drm_thaw(struct drm_device *dev)
 	/* KMS EnterVT equivalent */
 	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 		mutex_lock(&dev->struct_mutex);
+
+		intel_init_clock_gating(dev);
+
 		dev_priv->mm.suspended = 0;
 
 		error = i915_gem_init_ringbuffer(dev);
diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c
index 60a94d2..b478d16 100644
--- a/drivers/gpu/drm/i915/i915_suspend.c
+++ b/drivers/gpu/drm/i915/i915_suspend.c
@@ -863,8 +863,6 @@ int i915_restore_state(struct drm_device *dev)
 		I915_WRITE(IMR, dev_priv->saveIMR);
 	}
 
-	intel_init_clock_gating(dev);
-
 	if (IS_IRONLAKE_M(dev)) {
 		ironlake_enable_drps(dev);
 		intel_init_emon(dev);

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/