[PATCH] panfrost: Don't cleanup the job if it was successfully queued

[PATCH] panfrost: Don't cleanup the job if it was successfully queued

[Boris Brezillon]

The labels are misleading. Even though they are all prefixed with 'fail_'
the success case also takes that path, and we should definitely not
cleanup the job if it's been queued. While at it, let's rename those
labels so we don't do the same mistake again.

Fixes: 53516280cc38 ("drm/panfrost: use scheduler dependency tracking")
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
---
 drivers/gpu/drm/panfrost/panfrost_drv.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
index 16212b6b202e..077cbbfa506b 100644
--- a/drivers/gpu/drm/panfrost/panfrost_drv.c
+++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
@@ -253,7 +253,7 @@ static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
 	job = kzalloc(sizeof(*job), GFP_KERNEL);
 	if (!job) {
 		ret = -ENOMEM;
-		goto fail_out_sync;
+		goto out_put_syncout;
 	}
 
 	kref_init(&job->refcount);
@@ -270,29 +270,30 @@ static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
 				 &job->file_priv->sched_entity[slot],
 				 NULL);
 	if (ret)
-		goto fail_job_put;
+		goto out_put_job;
 
 	ret = panfrost_copy_in_sync(dev, file, args, job);
 	if (ret)
-		goto fail_job;
+		goto out_cleanup_job;
 
 	ret = panfrost_lookup_bos(dev, file, args, job);
 	if (ret)
-		goto fail_job;
+		goto out_cleanup_job;
 
 	ret = panfrost_job_push(job);
 	if (ret)
-		goto fail_job;
+		goto out_cleanup_job;
 
 	/* Update the return sync object for the job */
 	if (sync_out)
 		drm_syncobj_replace_fence(sync_out, job->render_done_fence);
 
-fail_job:
-	drm_sched_job_cleanup(&job->base);
-fail_job_put:
+out_cleanup_job:
+	if (ret)
+		drm_sched_job_cleanup(&job->base);
+out_put_job:
 	panfrost_job_put(job);
-fail_out_sync:
+out_put_syncout:
 	if (sync_out)
 		drm_syncobj_put(sync_out);
 
-- 
2.31.1

Re: [PATCH] panfrost: Don't cleanup the job if it was successfully queued

[Daniel Vetter]

On Tue, Aug 31, 2021 at 03:35:56PM +0200, Boris Brezillon wrote:
> The labels are misleading. Even though they are all prefixed with 'fail_'
> the success case also takes that path, and we should definitely not
> cleanup the job if it's been queued. While at it, let's rename those
> labels so we don't do the same mistake again.
> 
> Fixes: 53516280cc38 ("drm/panfrost: use scheduler dependency tracking")
> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>

Oops sorry about that, I thought I've had a t-b from panfrost already?

Anyway this looks good to me:

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> ---
>  drivers/gpu/drm/panfrost/panfrost_drv.c | 19 ++++++++++---------
>  1 file changed, 10 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
> index 16212b6b202e..077cbbfa506b 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_drv.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
> @@ -253,7 +253,7 @@ static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
>  	job = kzalloc(sizeof(*job), GFP_KERNEL);
>  	if (!job) {
>  		ret = -ENOMEM;
> -		goto fail_out_sync;
> +		goto out_put_syncout;
>  	}
>  
>  	kref_init(&job->refcount);
> @@ -270,29 +270,30 @@ static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
>  				 &job->file_priv->sched_entity[slot],
>  				 NULL);
>  	if (ret)
> -		goto fail_job_put;
> +		goto out_put_job;
>  
>  	ret = panfrost_copy_in_sync(dev, file, args, job);
>  	if (ret)
> -		goto fail_job;
> +		goto out_cleanup_job;
>  
>  	ret = panfrost_lookup_bos(dev, file, args, job);
>  	if (ret)
> -		goto fail_job;
> +		goto out_cleanup_job;
>  
>  	ret = panfrost_job_push(job);
>  	if (ret)
> -		goto fail_job;
> +		goto out_cleanup_job;
>  
>  	/* Update the return sync object for the job */
>  	if (sync_out)
>  		drm_syncobj_replace_fence(sync_out, job->render_done_fence);
>  
> -fail_job:
> -	drm_sched_job_cleanup(&job->base);
> -fail_job_put:
> +out_cleanup_job:
> +	if (ret)
> +		drm_sched_job_cleanup(&job->base);
> +out_put_job:
>  	panfrost_job_put(job);
> -fail_out_sync:
> +out_put_syncout:
>  	if (sync_out)
>  		drm_syncobj_put(sync_out);
>  
> -- 
> 2.31.1
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

Re: [PATCH] panfrost: Don't cleanup the job if it was successfully queued

[Steven Price]

On 31/08/2021 14:35, Boris Brezillon wrote:
> The labels are misleading. Even though they are all prefixed with 'fail_'
> the success case also takes that path, and we should definitely not
> cleanup the job if it's been queued. While at it, let's rename those
> labels so we don't do the same mistake again.
> 
> Fixes: 53516280cc38 ("drm/panfrost: use scheduler dependency tracking")
> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>

Reviewed-by: Steven Price <steven.price@arm.com>

And also unlike last time...

Tested-by: Steven Price <steven.price@arm.com>

Thanks for the clean up - I should have actually tested the previous
patch, but from the diff (and the previous label names) it was obviously
correct™! But it of course blows up pretty quickly without this change.

Thanks,

Steve

> ---
>  drivers/gpu/drm/panfrost/panfrost_drv.c | 19 ++++++++++---------
>  1 file changed, 10 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
> index 16212b6b202e..077cbbfa506b 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_drv.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
> @@ -253,7 +253,7 @@ static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
>  	job = kzalloc(sizeof(*job), GFP_KERNEL);
>  	if (!job) {
>  		ret = -ENOMEM;
> -		goto fail_out_sync;
> +		goto out_put_syncout;
>  	}
>  
>  	kref_init(&job->refcount);
> @@ -270,29 +270,30 @@ static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
>  				 &job->file_priv->sched_entity[slot],
>  				 NULL);
>  	if (ret)
> -		goto fail_job_put;
> +		goto out_put_job;
>  
>  	ret = panfrost_copy_in_sync(dev, file, args, job);
>  	if (ret)
> -		goto fail_job;
> +		goto out_cleanup_job;
>  
>  	ret = panfrost_lookup_bos(dev, file, args, job);
>  	if (ret)
> -		goto fail_job;
> +		goto out_cleanup_job;
>  
>  	ret = panfrost_job_push(job);
>  	if (ret)
> -		goto fail_job;
> +		goto out_cleanup_job;
>  
>  	/* Update the return sync object for the job */
>  	if (sync_out)
>  		drm_syncobj_replace_fence(sync_out, job->render_done_fence);
>  
> -fail_job:
> -	drm_sched_job_cleanup(&job->base);
> -fail_job_put:
> +out_cleanup_job:
> +	if (ret)
> +		drm_sched_job_cleanup(&job->base);
> +out_put_job:
>  	panfrost_job_put(job);
> -fail_out_sync:
> +out_put_syncout:
>  	if (sync_out)
>  		drm_syncobj_put(sync_out);
>  
>