linux-kernel - Re: [PATCH v3 5/9] dmaengine: idxd: Add missing cleanups in cleanup internals

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Message-ID: <a0049187-6f4a-4353-a0c8-5ae5e3dd08db@nvidia.com>
Date: Wed, 2 Apr 2025 16:27:56 -0700
From: Fenghua Yu <fenghuay@...dia.com>
To: Shuai Xue <xueshuai@...ux.alibaba.com>, vinicius.gomes@...el.com,
 dave.jiang@...el.com, Markus.Elfring@....de, vkoul@...nel.org
Cc: dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 5/9] dmaengine: idxd: Add missing cleanups in cleanup
 internals


On 3/8/25 22:20, Shuai Xue wrote:
> The idxd_cleanup_internals() function only decreases the reference count
> of groups, engines, and wqs but is missing the step to release memory
> resources.
>
> To fix this, use the cleanup helper to properly release the memory
> resources.
>
> Fixes: ddf742d4f3f1 ("dmaengine: idxd: Add missing cleanup for early error out in probe call")
> Cc: stable@...r.kernel.org
> Signed-off-by: Shuai Xue <xueshuai@...ux.alibaba.com>

Reviewed-by: Fenghua Yu <fenghuay@...dia.com>

Thanks.

-Fenghua

> ---
>   drivers/dma/idxd/init.c | 11 +++--------
>   1 file changed, 3 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
> index 7334085939dc..cf5dc981be32 100644
> --- a/drivers/dma/idxd/init.c
> +++ b/drivers/dma/idxd/init.c
> @@ -408,14 +408,9 @@ static int idxd_setup_groups(struct idxd_device *idxd)
>   
>   static void idxd_cleanup_internals(struct idxd_device *idxd)
>   {
> -	int i;
> -
> -	for (i = 0; i < idxd->max_groups; i++)
> -		put_device(group_confdev(idxd->groups[i]));
> -	for (i = 0; i < idxd->max_engines; i++)
> -		put_device(engine_confdev(idxd->engines[i]));
> -	for (i = 0; i < idxd->max_wqs; i++)
> -		put_device(wq_confdev(idxd->wqs[i]));
> +	idxd_clean_groups(idxd);
> +	idxd_clean_engines(idxd);
> +	idxd_clean_wqs(idxd);
>   	destroy_workqueue(idxd->wq);
>   }
>