[PATCH v2] drm/ttm: Should to return the evict error

[Deng, Emily]

[AMD Official Use Only - AMD Internal Distribution Only]



From: Chen, Xiaogang <Xiaogang.Chen at amd.com>
Sent: Friday, May 23, 2025 6:27 AM
To: Deng, Emily <Emily.Deng at amd.com>; amd-gfx at lists.freedesktop.org
Subject: Re: [PATCH v2] drm/ttm: Should to return the evict error



On 5/21/2025 9:42 PM, Deng, Emily wrote:

[AMD Official Use Only - AMD Internal Distribution Only]



[AMD Official Use Only - AMD Internal Distribution Only]



Ping......



Emily Deng

Best Wishes







-----Original Message-----

From: Emily Deng <Emily.Deng at amd.com><mailto:Emily.Deng at amd.com>

Sent: Wednesday, May 21, 2025 11:57 AM

To: amd-gfx at lists.freedesktop.org<mailto:amd-gfx at lists.freedesktop.org>

Cc: Deng, Emily <Emily.Deng at amd.com><mailto:Emily.Deng at amd.com>

Subject: [PATCH v2] drm/ttm: Should to return the evict error



For the evict fail case, the evict error should be returned.



v2: Consider ENOENT case.



Signed-off-by: Emily Deng <Emily.Deng at amd.com><mailto:Emily.Deng at amd.com>

---

drivers/gpu/drm/ttm/ttm_resource.c | 8 ++++----

1 file changed, 4 insertions(+), 4 deletions(-)



diff --git a/drivers/gpu/drm/ttm/ttm_resource.c b/drivers/gpu/drm/ttm/ttm_resource.c

index 097716bd248a..abf104ae9d35 100644

--- a/drivers/gpu/drm/ttm/ttm_resource.c

+++ b/drivers/gpu/drm/ttm/ttm_resource.c

@@ -511,12 +511,12 @@ int ttm_resource_manager_evict_all(struct ttm_device

*bdev,

              .force_alloc = true

      };

      struct dma_fence *fence;

-      int ret;

+      int ret, evict_ret = 0;



      do {

-              ret = ttm_bo_evict_first(bdev, man, &ctx);

+              evict_ret = ttm_bo_evict_first(bdev, man, &ctx);

              cond_resched();

-      } while (!ret);

+      } while (!evict_ret);



      spin_lock(&man->move_lock);

      fence = dma_fence_get(man->move);

@@ -529,7 +529,7 @@ int ttm_resource_manager_evict_all(struct ttm_device *bdev,

                      return ret;

      }



-      return 0;

+      return (evict_ret == -ENOENT) ? 0 : evict_ret;

}

Can you explain why you care ENOENT(No such file or directory) specifically?

Regards

Xiaogang

For ENOENT, it simply means the resource or file doesn't exist—it doesn't indicate an error during eviction. We only need to focus on actual eviction-related errors.

Emily Deng
Best Wishes






EXPORT_SYMBOL(ttm_resource_manager_evict_all);



--

2.34.1


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