This is a note to let you know that I've just added the patch titled
drm/ttm: return ENOSPC from ttm_bo_mem_space v3
to the 6.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-ttm-return-enospc-from-ttm_bo_mem_space-v3.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 148a71ff2bcaa40142c21b22a5c25b075607a959
Author: Christian König <christian.koenig@xxxxxxx>
Date: Tue Dec 5 16:40:40 2023 +0100
drm/ttm: return ENOSPC from ttm_bo_mem_space v3
[ Upstream commit 28e5126718c7b306b8c29d2ae8f48417e9303aa1 ]
Only convert it to ENOMEM in ttm_bo_validate.
This allows ttm_bo_validate to distinguish between an out of memory
situation and just out of space in a placement domain.
v2: improve commit message
v3: fix kerneldoc typos
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
Reviewed-by: Zack Rusin <zack.rusin@xxxxxxxxxxxx>
Reviewed-by: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240112125158.2748-3-christian.koenig@xxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index edf10618fe2b2..f95b0406ca995 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -770,7 +770,7 @@ static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
* This function may sleep while waiting for space to become available.
* Returns:
* -EBUSY: No space available (only if no_wait == 1).
- * -ENOMEM: Could not allocate memory for the buffer object, either due to
+ * -ENOSPC: Could not allocate space for the buffer object, either due to
* fragmentation or concurrent allocators.
* -ERESTARTSYS: An interruptible sleep was interrupted by a signal.
*/
@@ -830,7 +830,7 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
goto error;
}
- ret = -ENOMEM;
+ ret = -ENOSPC;
if (!type_found) {
pr_err(TTM_PFX "No compatible memory type found\n");
ret = -EINVAL;
@@ -916,6 +916,9 @@ int ttm_bo_validate(struct ttm_buffer_object *bo,
return -EINVAL;
ret = ttm_bo_move_buffer(bo, placement, ctx);
+ /* For backward compatibility with userspace */
+ if (ret == -ENOSPC)
+ return -ENOMEM;
if (ret)
return ret;
