1 files changed, 41 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2184-drm-amdgpu-set-f_mapping-on-exported-DMA-bufs.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2184-drm-amdgpu-set-f_mapping-on-exported-DMA-bufs.patch
new file mode 100644
index 00000000..26a4aded
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2184-drm-amdgpu-set-f_mapping-on-exported-DMA-bufs.patch
@@ -0,0 +1,41 @@
+From 272ada6974b3d94cca1325f7bc0ff0266054d6a0 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
+Date: Mon, 13 Nov 2017 17:20:50 +0100
+Subject: [PATCH 2184/4131] drm/amdgpu: set f_mapping on exported DMA-bufs
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Otherwise we can't correctly CPU map TTM buffers.
+
+Signed-off-by: Christian König <christian.koenig@amd.com>
+Acked-by: Alex Deucher <alexander.deucher@amd.com>
+---
+ drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
+index 581ba9d..26fe6ce 100644
+--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
++++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
+@@ -187,12 +187,16 @@ struct dma_buf *amdgpu_gem_prime_export(struct drm_device *dev,
+ 					int flags)
+ {
+ 	struct amdgpu_bo *bo = gem_to_amdgpu_bo(gobj);
++	struct dma_buf *buf;
+ 
+ 	if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm) ||
+ 	    bo->flags & AMDGPU_GEM_CREATE_VM_ALWAYS_VALID)
+ 		return ERR_PTR(-EPERM);
+ 
+-	return drm_gem_prime_export(dev, gobj, flags);
++	buf = drm_gem_prime_export(dev, gobj, flags);
++	if (!IS_ERR(buf))
++		buf->file->f_mapping = dev->anon_inode->i_mapping;
++	return buf;
+ }
+ 
+ struct drm_gem_object *
+-- 
+2.7.4
+