From: Chris Wilson Date: Tue, 20 Nov 2012 10:45:16 +0000 (+0000) Subject: drm/i915: Guard pages being reaped by OOM whilst binding-to-GTT X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=fbdda6fb5ee5da401af42226878880069a6b8615;p=linux-beck.git drm/i915: Guard pages being reaped by OOM whilst binding-to-GTT In the circumstances that the shrinker is allowed to steal the mutex in order to reap pages, we need to be careful to prevent it operating on the current object and shooting ourselves in the foot. Signed-off-by: Chris Wilson Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index a2f1b8652d68..643b7f6368a0 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2925,6 +2925,8 @@ i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj, if (ret) return ret; + i915_gem_object_pin_pages(obj); + search_free: if (map_and_fenceable) free_space = @@ -2955,14 +2957,17 @@ i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj, obj->cache_level, map_and_fenceable, nonblocking); - if (ret) + if (ret) { + i915_gem_object_unpin_pages(obj); return ret; + } goto search_free; } if (WARN_ON(!i915_gem_valid_gtt_space(dev, obj->gtt_space, obj->cache_level))) { + i915_gem_object_unpin_pages(obj); drm_mm_put_block(obj->gtt_space); obj->gtt_space = NULL; return -EINVAL; @@ -2971,6 +2976,7 @@ i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj, ret = i915_gem_gtt_prepare_object(obj); if (ret) { + i915_gem_object_unpin_pages(obj); drm_mm_put_block(obj->gtt_space); obj->gtt_space = NULL; return ret; @@ -2993,6 +2999,7 @@ i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj, obj->map_and_fenceable = mappable && fenceable; + i915_gem_object_unpin_pages(obj); trace_i915_gem_object_bind(obj, map_and_fenceable); i915_gem_verify_gtt(dev); return 0;