[PATCH] drm: i915: use kzalloc_flex

[Rosen Penev <rosenp@gmail.com>]

Simplifies allocations by using a flexible array member in this struct.
No need to free separately.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 drivers/gpu/drm/i915/gt/intel_gtt.h   |  2 +-
 drivers/gpu/drm/i915/gt/intel_ppgtt.c | 15 +--------------
 2 files changed, 2 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.h b/drivers/gpu/drm/i915/gt/intel_gtt.h
index f6f223090760..49b2d2d24fd8 100644
--- a/drivers/gpu/drm/i915/gt/intel_gtt.h
+++ b/drivers/gpu/drm/i915/gt/intel_gtt.h
@@ -187,7 +187,7 @@ struct i915_page_table {
 struct i915_page_directory {
 	struct i915_page_table pt;
 	spinlock_t lock;
-	void **entry;
+	void *entry[];
 };
 
 #define __px_choose_expr(x, type, expr, other) \
diff --git a/drivers/gpu/drm/i915/gt/intel_ppgtt.c b/drivers/gpu/drm/i915/gt/intel_ppgtt.c
index 72d8473a448b..20cc59a005c9 100644
--- a/drivers/gpu/drm/i915/gt/intel_ppgtt.c
+++ b/drivers/gpu/drm/i915/gt/intel_ppgtt.c
@@ -36,16 +36,10 @@ struct i915_page_directory *__alloc_pd(int count)
 {
 	struct i915_page_directory *pd;
 
-	pd = kzalloc_obj(*pd, I915_GFP_ALLOW_FAIL);
+	pd = kzalloc_flex(*pd, entry, count, I915_GFP_ALLOW_FAIL);
 	if (unlikely(!pd))
 		return NULL;
 
-	pd->entry = kzalloc_objs(*pd->entry, count, I915_GFP_ALLOW_FAIL);
-	if (unlikely(!pd->entry)) {
-		kfree(pd);
-		return NULL;
-	}
-
 	spin_lock_init(&pd->lock);
 	return pd;
 }
@@ -60,7 +54,6 @@ struct i915_page_directory *alloc_pd(struct i915_address_space *vm)
 
 	pd->pt.base = vm->alloc_pt_dma(vm, I915_GTT_PAGE_SIZE_4K);
 	if (IS_ERR(pd->pt.base)) {
-		kfree(pd->entry);
 		kfree(pd);
 		return ERR_PTR(-ENOMEM);
 	}
@@ -72,12 +65,6 @@ void free_px(struct i915_address_space *vm, struct i915_page_table *pt, int lvl)
 {
 	BUILD_BUG_ON(offsetof(struct i915_page_directory, pt));
 
-	if (lvl) {
-		struct i915_page_directory *pd =
-			container_of(pt, typeof(*pd), pt);
-		kfree(pd->entry);
-	}
-
 	if (pt->base)
 		i915_gem_object_put(pt->base);
 
-- 
2.54.0