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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-06-17 22:34:38 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-06-18 00:48:37 +0200 |
| commit | f25748ea7342bcc44866befcbf0222cd1d89d851 (patch) | |
| tree | addc91c3b16088a67b6765bda6e7312010de63a6 /drivers/gpu/drm/i915/i915_gem.c | |
| parent | 8a270ebf341105b85aaf4f5e4336bb53b3c10177 (diff) | |
| download | linux-f25748ea7342bcc44866befcbf0222cd1d89d851.tar.gz | |
drm/i915: Don't BUG_ON in i915_gem_obj_offset
A WARN_ON is perfectly fine.
The BUG in here seems to be the cause behind hard-hangs when I cat the
i915_gem_pageflip debugfs file (which calls this from an irq
spinlock). But only while running a full igt run after a while. I
still need to root cause the underlying issue.
I'll also start reject patches which add new BUG_ON but don't come
with a really good justification for it. The general rule really
should be to just WARN and hope the driver survives for long enough.
v2: Make the WARN a bit more useful per Chris' suggestion.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index d8364135c2e5..d857f5839d58 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -5078,12 +5078,13 @@ unsigned long i915_gem_obj_offset(struct drm_i915_gem_object *o, vm == &dev_priv->mm.aliasing_ppgtt->base) vm = &dev_priv->gtt.base; - BUG_ON(list_empty(&o->vma_list)); list_for_each_entry(vma, &o->vma_list, vma_link) { if (vma->vm == vm) return vma->node.start; } + WARN(1, "%s vma for this object not found.\n", + i915_is_ggtt(vm) ? "global" : "ppgtt"); return -1; } |