Commit 935f38d6 authored by Ben Widawsky's avatar Ben Widawsky Committed by Daniel Vetter

drm/i915: Unref context on failed eb_create

I opted to do this instead of grabbing the context reference after
eb_create since eb_create can potentially call the shrinker, and that
makes things very complicated. This simple patch balances the ref count
without requiring a great deal of review to make sure the shrinker path
is safe.

Theoretically (by design) the shrinker can end up destroying a context,
which enforces the reasoning for doing the fix this way instead of
moving the reference to later in the function.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: default avatarBen Widawsky <ben@bwidawsk.net>
Reviewed-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent cfa7698b
......@@ -1132,7 +1132,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
mutex_unlock(&dev->struct_mutex);
ret = PTR_ERR(ctx);
goto pre_mutex_err;
}
}
i915_gem_context_reference(ctx);
......@@ -1142,6 +1142,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
eb = eb_create(args);
if (eb == NULL) {
i915_gem_context_unreference(ctx);
mutex_unlock(&dev->struct_mutex);
ret = -ENOMEM;
goto pre_mutex_err;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment