drm/i915: Flatten engine init control flow
Now that sanity prevails and we have the clean split between software
init and starting the engines we can drop all the "have we allocate
this struct already?" nonsense.
Execlist code could benefit quite a bit more still, but that's for
another patch.
Reviewed-by: Dave Gordon <david.s.gordon@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 590b7c3..79b4ca5 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -635,8 +635,7 @@
{
int ret;
- if (ring->scratch.obj)
- return 0;
+ WARN_ON(ring->scratch.obj);
ring->scratch.obj = i915_gem_alloc_object(ring->dev, 4096);
if (ring->scratch.obj == NULL) {
@@ -1799,15 +1798,15 @@
static int intel_init_ring_buffer(struct drm_device *dev,
struct intel_engine_cs *ring)
{
- struct intel_ringbuffer *ringbuf = ring->buffer;
+ struct intel_ringbuffer *ringbuf;
int ret;
- if (ringbuf == NULL) {
- ringbuf = kzalloc(sizeof(*ringbuf), GFP_KERNEL);
- if (!ringbuf)
- return -ENOMEM;
- ring->buffer = ringbuf;
- }
+ WARN_ON(ring->buffer);
+
+ ringbuf = kzalloc(sizeof(*ringbuf), GFP_KERNEL);
+ if (!ringbuf)
+ return -ENOMEM;
+ ring->buffer = ringbuf;
ring->dev = dev;
INIT_LIST_HEAD(&ring->active_list);
@@ -1830,21 +1829,21 @@
goto error;
}
- if (ringbuf->obj == NULL) {
- ret = intel_alloc_ringbuffer_obj(dev, ringbuf);
- if (ret) {
- DRM_ERROR("Failed to allocate ringbuffer %s: %d\n",
- ring->name, ret);
- goto error;
- }
+ WARN_ON(ringbuf->obj);
- ret = intel_pin_and_map_ringbuffer_obj(dev, ringbuf);
- if (ret) {
- DRM_ERROR("Failed to pin and map ringbuffer %s: %d\n",
- ring->name, ret);
- intel_destroy_ringbuffer_obj(ringbuf);
- goto error;
- }
+ ret = intel_alloc_ringbuffer_obj(dev, ringbuf);
+ if (ret) {
+ DRM_ERROR("Failed to allocate ringbuffer %s: %d\n",
+ ring->name, ret);
+ goto error;
+ }
+
+ ret = intel_pin_and_map_ringbuffer_obj(dev, ringbuf);
+ if (ret) {
+ DRM_ERROR("Failed to pin and map ringbuffer %s: %d\n",
+ ring->name, ret);
+ intel_destroy_ringbuffer_obj(ringbuf);
+ goto error;
}
/* Workaround an erratum on the i830 which causes a hang if