[PATCH] drm/amdgpu: don't oops on failure to load

[Dave Airlie]

From: Dave Airlie <airlied at redhat.com>

In two places amdgpu tries to tear down something it hasn't
initalised when failing. This is what happens when you
enable experimental support on topaz which then fails in
ring init.

This patch allows it to fail cleanly.

Signed-off-by: Dave Airlie <airlied at redhat.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c       | 3 +++
 drivers/gpu/drm/amd/scheduler/gpu_scheduler.c | 3 ++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
index e0b80cc..fec65f0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
@@ -69,6 +69,9 @@ void amdgpu_ctx_fini(struct amdgpu_ctx *ctx)
 	struct amdgpu_device *adev = ctx->adev;
 	unsigned i, j;
 
+	if (!adev)
+		return;
+
 	for (i = 0; i < AMDGPU_MAX_RINGS; ++i)
 		for (j = 0; j < AMDGPU_CTX_MAX_CS_PENDING; ++j)
 			fence_put(ctx->rings[i].fences[j]);
diff --git a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
index 7fa1d7a..d3b9eb7 100644
--- a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
+++ b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
@@ -462,5 +462,6 @@ int amd_sched_init(struct amd_gpu_scheduler *sched,
  */
 void amd_sched_fini(struct amd_gpu_scheduler *sched)
 {
-	kthread_stop(sched->thread);
+	if (sched->thread)
+		kthread_stop(sched->thread);
 }
-- 
2.5.0