openwrt_lede/target/linux/brcm2708/patches-4.4/0541-drm-vc4-Use-drm_malloc_ab-to-fix-large-rendering-job.patch

From ed5a62d83a6a9bd2b318f0ed9bf9b3d28376f8f7 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Tue, 19 Jul 2016 11:32:44 -0700
Subject: [PATCH] drm/vc4: Use drm_malloc_ab to fix large rendering jobs.

If you exceeded the size that kmalloc would return, you'd get a dmesg
warning and a return from the job submit.  We can handle much
allocations with vmalloc, and drm_malloc_ab makes that decision.

Fixes failure in piglit's scissor-many.

Signed-off-by: Eric Anholt <eric@anholt.net>
(cherry picked from commit ece7267dccf0e9e08cb6e8dc6b7ad2be9c4eb444)
---
 drivers/gpu/drm/vc4/vc4_gem.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

--- a/drivers/gpu/drm/vc4/vc4_gem.c
+++ b/drivers/gpu/drm/vc4/vc4_gem.c
@@ -549,8 +549,8 @@ vc4_cl_lookup_bos(struct drm_device *dev
 		return -EINVAL;
 	}
 
-	exec->bo = kcalloc(exec->bo_count, sizeof(struct drm_gem_cma_object *),
-			   GFP_KERNEL);
+	exec->bo = drm_calloc_large(exec->bo_count,
+				    sizeof(struct drm_gem_cma_object *));
 	if (!exec->bo) {
 		DRM_ERROR("Failed to allocate validated BO pointers\n");
 		return -ENOMEM;
@@ -624,7 +624,7 @@ vc4_get_bcl(struct drm_device *dev, stru
 	 * read the contents back for validation, and I think the
 	 * bo->vaddr is uncached access.
 	 */
-	temp = kmalloc(temp_size, GFP_KERNEL);
+	temp = drm_malloc_ab(temp_size, 1);
 	if (!temp) {
 		DRM_ERROR("Failed to allocate storage for copying "
 			  "in bin/render CLs.\n");
@@ -699,7 +699,7 @@ vc4_get_bcl(struct drm_device *dev, stru
 	ret = vc4_wait_for_seqno(dev, exec->bin_dep_seqno, ~0ull, true);
 
 fail:
-	kfree(temp);
+	drm_free_large(temp);
 	return ret;
 }
 
@@ -712,7 +712,7 @@ vc4_complete_exec(struct drm_device *dev
 	if (exec->bo) {
 		for (i = 0; i < exec->bo_count; i++)
 			drm_gem_object_unreference_unlocked(&exec->bo[i]->base);
-		kfree(exec->bo);
+		drm_free_large(exec->bo);
 	}
 
 	while (!list_empty(&exec->unref_list)) {