[PATCH v1] drm/syncobj: Fix sync syncobj issue

[PATCH v1] drm/syncobj: Fix sync syncobj issue

[jie1zhan]

enable signaling after flatten dma_fence_chains on transfer

Signed-off-by: jie1zhan <jesse.zhang@amd.com>

Reviewed-by: Christian König <christian.koenig@amd.com>

Reviewed-by: Nirmoy Das <nirmoy.das@linux.intel.com>
---
 drivers/gpu/drm/drm_syncobj.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
index 7e48dcd1bee4..0d9d3577325f 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -920,6 +920,7 @@ static int drm_syncobj_transfer_to_timeline(struct drm_file *file_private,
 	if (ret)
 		goto err_free_fence;
 
+	dma_fence_enable_sw_signaling(fence);
 	chain = dma_fence_chain_alloc();
 	if (!chain) {
 		ret = -ENOMEM;
-- 
2.25.1

Re: [PATCH v1] drm/syncobj: Fix sync syncobj issue

[Christian König]

Am 07.07.22 um 05:08 schrieb jie1zhan:
> enable signaling after flatten dma_fence_chains on transfer
>
> Signed-off-by: jie1zhan <jesse.zhang@amd.com>
>
> Reviewed-by: Christian König <christian.koenig@amd.com>
>
> Reviewed-by: Nirmoy Das <nirmoy.das@linux.intel.com>

Well please drop those Reviewed-by lines immediately! Neither Nirmoy nor 
me gave you the permission to add an rb to this patch. It looks like you 
have a major misunderstanding when to add that.

> ---
>   drivers/gpu/drm/drm_syncobj.c | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
> index 7e48dcd1bee4..0d9d3577325f 100644
> --- a/drivers/gpu/drm/drm_syncobj.c
> +++ b/drivers/gpu/drm/drm_syncobj.c
> @@ -920,6 +920,7 @@ static int drm_syncobj_transfer_to_timeline(struct drm_file *file_private,
>   	if (ret)
>   		goto err_free_fence;
>   
> +	dma_fence_enable_sw_signaling(fence);

That looks better, but ideally we would enable signaling when the fence 
is retrieved from the drm_syncobj and queried for it's signaled state.

Regards,
Christian.

>   	chain = dma_fence_chain_alloc();
>   	if (!chain) {
>   		ret = -ENOMEM;