4 files changed, 39 insertions, 1 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index cef3a43ab0aa..bf0c607de195 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1902,6 +1902,8 @@ int amdgpu_ctx_query(struct amdgpu_device *adev, struct amdgpu_fpriv *fpriv,
                                                         uint32_t id,struct amdgpu_ctx_state *state);
 
 void amdgpu_ctx_fini(struct amdgpu_fpriv *fpriv);
+struct amdgpu_ctx *amdgpu_ctx_get(struct amdgpu_fpriv *fpriv, uint32_t id);
+int amdgpu_ctx_put(struct amdgpu_ctx *ctx);
 
 extern int amdgpu_ctx_ioctl(struct drm_device *dev, void *data,
                                                  struct drm_file *filp);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index ffbe9aa9f232..86b93245bf9d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -768,8 +768,13 @@ int amdgpu_cs_wait_ioctl(struct drm_device *dev, void *data,
         uint64_t seq[AMDGPU_MAX_RINGS] = {0};
         struct amdgpu_ring *ring = NULL;
         unsigned long timeout = amdgpu_gem_timeout(wait->in.timeout);
+        struct amdgpu_ctx *ctx;
         long r;
 
+        ctx = amdgpu_ctx_get(filp->driver_priv, wait->in.ctx_id);
+        if (ctx == NULL)
+                return -EINVAL;
+
         r = amdgpu_cs_get_ring(adev, wait->in.ip_type, wait->in.ip_instance,
                                wait->in.ring, &ring);
         if (r)
@@ -778,6 +783,7 @@ int amdgpu_cs_wait_ioctl(struct drm_device *dev, void *data,
         seq[ring->idx] = wait->in.handle;
 
         r = amdgpu_fence_wait_seq_timeout(adev, seq, true, timeout);
+        amdgpu_ctx_put(ctx);
         if (r < 0)
                 return r;
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
index 0dc3a4ebd5d3..bcd332e085f6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
@@ -151,3 +151,33 @@ int amdgpu_ctx_ioctl(struct drm_device *dev, void *data,
 
         return r;
 }
+
+struct amdgpu_ctx *amdgpu_ctx_get(struct amdgpu_fpriv *fpriv, uint32_t id)
+{
+        struct amdgpu_ctx *ctx;
+        struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
+
+        mutex_lock(&mgr->lock);
+        ctx = idr_find(&mgr->ctx_handles, id);
+        if (ctx)
+                kref_get(&ctx->refcount);
+        mutex_unlock(&mgr->lock);
+        return ctx;
+}
+
+int amdgpu_ctx_put(struct amdgpu_ctx *ctx)
+{
+        struct amdgpu_fpriv *fpriv;
+        struct amdgpu_ctx_mgr *mgr;
+
+        if (ctx == NULL)
+                return -EINVAL;
+
+        fpriv = ctx->fpriv;
+        mgr = &fpriv->ctx_mgr;
+        mutex_lock(&mgr->lock);
+        kref_put(&ctx->refcount, amdgpu_ctx_do_release);
+        mutex_unlock(&mgr->lock);
+
+        return 0;
+}
diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
index 77bc5740fd7c..ca0ea1efa3f4 100644
--- a/include/uapi/drm/amdgpu_drm.h
+++ b/include/uapi/drm/amdgpu_drm.h
@@ -260,7 +260,7 @@ struct drm_amdgpu_wait_cs_in {
         uint32_t ip_type;
         uint32_t ip_instance;
         uint32_t ring;
-        uint32_t _pad;
+        uint32_t ctx_id;
 };
 
 struct drm_amdgpu_wait_cs_out {