drm/i915: Remove a couple pointless WARN_ONs

Just two WARN_ONs followed by pointer dereference I spotted by accident.

v2: Remove some more of the same.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1461080770-14693-1-git-send-email-tvrtko.ursulin@linux.intel.com

3 files changed, 3 insertions, 16 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 6ce2c31b9a81..a14a98341a4b 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1444,18 +1444,13 @@ __i915_gem_request_retire__upto(struct drm_i915_gem_request *req)
 int
 i915_wait_request(struct drm_i915_gem_request *req)
 {
-        struct drm_device *dev;
-        struct drm_i915_private *dev_priv;
+        struct drm_i915_private *dev_priv = req->i915;
         bool interruptible;
         int ret;
 
-        BUG_ON(req == NULL);
-
-        dev = req->engine->dev;
-        dev_priv = dev->dev_private;
         interruptible = dev_priv->mm.interruptible;
 
-        BUG_ON(!mutex_is_locked(&dev->struct_mutex));
+        BUG_ON(!mutex_is_locked(&dev_priv->dev->struct_mutex));
 
         ret = __i915_wait_request(req, interruptible, NULL, NULL);
         if (ret)
@@ -4355,7 +4350,6 @@ i915_gem_object_ggtt_unpin_view(struct drm_i915_gem_object *obj,
 {
         struct i915_vma *vma = i915_gem_obj_to_ggtt_view(obj, view);
 
-        BUG_ON(!vma);
         WARN_ON(vma->pin_count == 0);
         WARN_ON(!i915_gem_obj_ggtt_bound_view(obj, view));
 
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 1562a75ac9d1..6179b591ee84 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -892,8 +892,6 @@ int intel_logical_ring_begin(struct drm_i915_gem_request *req, int num_dwords)
 {
         int ret;
 
-        WARN_ON(req == NULL);
-
         ret = logical_ring_prepare(req, num_dwords * sizeof(uint32_t));
         if (ret)
                 return ret;
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 444d30adf60d..978f0b676c68 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -2490,14 +2490,9 @@ static int __intel_ring_prepare(struct intel_engine_cs *engine, int bytes)
 int intel_ring_begin(struct drm_i915_gem_request *req,
                      int num_dwords)
 {
-        struct intel_engine_cs *engine;
-        struct drm_i915_private *dev_priv;
+        struct intel_engine_cs *engine = req->engine;
         int ret;
 
-        WARN_ON(req == NULL);
-        engine = req->engine;
-        dev_priv = req->i915;
-
         ret = __intel_ring_prepare(engine, num_dwords * sizeof(uint32_t));
         if (ret)
                 return ret;