Re: [PATCH 06/36] drm/amdgpu: use the unlocked drm_gem_object_put

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Am 07.05.20 um 20:03 schrieb Sam Ravnborg:
Hi Emil.

On Thu, May 07, 2020 at 04:07:52PM +0100, Emil Velikov wrote:
From: Emil Velikov <emil.velikov@xxxxxxxxxxxxx>

The driver does not hold struct_mutex, thus using the locked version of
the helper is incorrect.

Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: Christian König <christian.koenig@xxxxxxx>
Cc: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Fixes: a39414716ca0 ("drm/amdgpu: add independent DMA-buf import v9"):
Signed-off-by: Emil Velikov <emil.l.velikov@xxxxxxxxx>
---
  drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
index 43d8ed7dbd00..652c57a3b847 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
@@ -587,7 +587,7 @@ struct drm_gem_object *amdgpu_gem_prime_import(struct drm_device *dev,
  	attach = dma_buf_dynamic_attach(dma_buf, dev->dev,
  					&amdgpu_dma_buf_attach_ops, obj);
  	if (IS_ERR(attach)) {
-		drm_gem_object_put(obj);
+		drm_gem_object_put_unlocked(obj);
  		return ERR_CAST(attach);
  	}
Likewise previous patch.
Drop this as the patch is correct after the rename a few pathces later.

Well this is a bug fix in the error path and should probably be back ported, so having a separate patch is certainly a good idea.

Christian.


	Sam

--
2.25.1

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