[PATCH] drm/amdgpu: fix "mitigate workaround for i915"

[Deucher, Alexander]

Acked-by: Alex Deucher <alexander.deucher at amd.com>

________________________________
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> on behalf of Christian König <ckoenig.leichtzumerken at gmail.com>
Sent: Wednesday, March 21, 2018 9:08:18 AM
To: amd-gfx at lists.freedesktop.org
Subject: [PATCH] drm/amdgpu: fix "mitigate workaround for i915"

Mixed up exporter and importer here. E.g. while mapping the BO we need
to check the importer not the exporter.

Signed-off-by: Christian König <christian.koenig at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
index 1c9991738477..4b584cb75bf4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
@@ -132,6 +132,7 @@ static int amdgpu_gem_map_attach(struct dma_buf *dma_buf,
 {
         struct drm_gem_object *obj = dma_buf->priv;
         struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
+       struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
         long r;

         r = drm_gem_map_attach(dma_buf, target_dev, attach);
@@ -143,7 +144,7 @@ static int amdgpu_gem_map_attach(struct dma_buf *dma_buf,
                 goto error_detach;


-       if (dma_buf->ops != &amdgpu_dmabuf_ops) {
+       if (attach->dev->driver != adev->dev->driver) {
                 /*
                  * Wait for all shared fences to complete before we switch to future
                  * use of exclusive fence on this prime shared bo.
@@ -162,7 +163,7 @@ static int amdgpu_gem_map_attach(struct dma_buf *dma_buf,
         if (r)
                 goto error_unreserve;

-       if (dma_buf->ops != &amdgpu_dmabuf_ops)
+       if (attach->dev->driver != adev->dev->driver)
                 bo->prime_shared_count++;

 error_unreserve:
@@ -179,6 +180,7 @@ static void amdgpu_gem_map_detach(struct dma_buf *dma_buf,
 {
         struct drm_gem_object *obj = dma_buf->priv;
         struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
+       struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
         int ret = 0;

         ret = amdgpu_bo_reserve(bo, true);
@@ -186,7 +188,7 @@ static void amdgpu_gem_map_detach(struct dma_buf *dma_buf,
                 goto error;

         amdgpu_bo_unpin(bo);
-       if (dma_buf->ops != &amdgpu_dmabuf_ops && bo->prime_shared_count)
+       if (attach->dev->driver != adev->dev->driver && bo->prime_shared_count)
                 bo->prime_shared_count--;
         amdgpu_bo_unreserve(bo);

--
2.14.1

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