mirror of https://github.com/hak5/openwrt.git
35 lines
1.0 KiB
Diff
35 lines
1.0 KiB
Diff
From 3f131f18e76bb3fa56158adea3abddeaac68e860 Mon Sep 17 00:00:00 2001
|
|
From: Eric Anholt <eric@anholt.net>
|
|
Date: Thu, 9 Feb 2017 09:23:34 -0800
|
|
Subject: [PATCH] drm/vc4: Fix OOPSes from trying to cache a partially
|
|
constructed BO.
|
|
|
|
If a CMA allocation failed, the partially constructed BO would be
|
|
unreferenced through the normal path, and we might choose to put it in
|
|
the BO cache. If we then reused it before it expired from the cache,
|
|
the kernel would OOPS.
|
|
|
|
Signed-off-by: Eric Anholt <eric@anholt.net>
|
|
Fixes: c826a6e10644 ("drm/vc4: Add a BO cache.")
|
|
---
|
|
drivers/gpu/drm/vc4/vc4_bo.c | 8 ++++++++
|
|
1 file changed, 8 insertions(+)
|
|
|
|
--- a/drivers/gpu/drm/vc4/vc4_bo.c
|
|
+++ b/drivers/gpu/drm/vc4/vc4_bo.c
|
|
@@ -322,6 +322,14 @@ void vc4_free_object(struct drm_gem_obje
|
|
goto out;
|
|
}
|
|
|
|
+ /* If this object was partially constructed but CMA allocation
|
|
+ * had failed, just free it.
|
|
+ */
|
|
+ if (!bo->base.vaddr) {
|
|
+ vc4_bo_destroy(bo);
|
|
+ goto out;
|
|
+ }
|
|
+
|
|
cache_list = vc4_get_cache_list_for_size(dev, gem_bo->size);
|
|
if (!cache_list) {
|
|
vc4_bo_destroy(bo);
|