linux-kernel - Re: [Intel-gfx] linux-next: Tree for Jul 25 [ call-trace: drm

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Message-ID: <20130725184504.GC11514@cantiga.alporthouse.com>
Date:	Thu, 25 Jul 2013 19:45:04 +0100
From:	Chris Wilson <chris@...is-wilson.co.uk>
To:	Sedat Dilek <sedat.dilek@...il.com>
Cc:	Daniel Vetter <daniel.vetter@...ll.ch>,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	intel-gfx <intel-gfx@...ts.freedesktop.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	DRI <dri-devel@...ts.freedesktop.org>,
	linux-next <linux-next@...r.kernel.org>
Subject: Re: [Intel-gfx] linux-next: Tree for Jul 25 [ call-trace: drm |
 drm-intel related? ]

On Thu, Jul 25, 2013 at 08:03:06PM +0200, Sedat Dilek wrote:
> On Thu, Jul 25, 2013 at 7:55 PM, Sedat Dilek <sedat.dilek@...il.com> wrote:
> > F*ck. Wrong patch refreshed.
> >
> 
> New dmesg attached.

Hmm, not seeing any difference, so let's add a couple more lines just to
be sure:

(apologies I didn't stash the previous debug patch)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 0563661..4d21f37 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1624,30 +1624,39 @@ i915_gem_mmap_gtt(struct drm_file *file,
 	struct drm_i915_gem_object *obj;
 	int ret;
 
+	printk(KERN_ERR "Hello!\n");
+
 	ret = i915_mutex_lock_interruptible(dev);
-	if (ret)
+	if (ret) {
+		DRM_DEBUG_DRIVER("interrupted: ret=%d\n", ret);
 		return ret;
+	}
 
 	obj = to_intel_bo(drm_gem_object_lookup(dev, file, handle));
 	if (&obj->base == NULL) {
+		DRM_DEBUG_DRIVER("Unknown object handle %d\n", handle);
 		ret = -ENOENT;
 		goto unlock;
 	}
 
 	if (obj->base.size > dev_priv->gtt.mappable_end) {
+		DRM_DEBUG_DRIVER("Object (%d) larger than mappable aperture (%d) > %d\n",
+				(int)obj->base.size, (int)dev_priv->gtt.mappable_end);
 		ret = -E2BIG;
 		goto out;
 	}
 
 	if (obj->madv != I915_MADV_WILLNEED) {
-		DRM_ERROR("Attempting to mmap a purgeable buffer\n");
+		DRM_DEBUG_DRIVER("Attempting to mmap a purgeable buffer\n");
 		ret = -EINVAL;
 		goto out;
 	}
 
 	ret = i915_gem_object_create_mmap_offset(obj);
-	if (ret)
+	if (ret) {
+		DRM_DEBUG_DRIVER("Failed to allocate mmap offset (ret=%d)\n", ret);
 		goto out;
+	}
 
 	*offset = (u64)obj->base.map_list.hash.key << PAGE_SHIFT;
 
@@ -1655,6 +1664,7 @@ out:
 	drm_gem_object_unreference(&obj->base);
 unlock:
 	mutex_unlock(&dev->struct_mutex);
+	DRM_DEBUG_DRIVER("done, ret=%d\n", ret);
 	return ret;
 }


-- 
Chris Wilson, Intel Open Source Technology Centre
--
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