linux-kernel - Re: [PATCH v4 5/9] dmaengine: idxd: Add missing cleanups in cleanup internals

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Message-ID: <1538e3d7-49fe-4d9f-b6d8-5e211a5afbfe@intel.com>
Date: Tue, 13 May 2025 07:54:21 -0700
From: Dave Jiang <dave.jiang@...el.com>
To: Shuai Xue <xueshuai@...ux.alibaba.com>, vinicius.gomes@...el.com,
 fenghuay@...dia.com, vkoul@...nel.org
Cc: dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 5/9] dmaengine: idxd: Add missing cleanups in cleanup
 internals



On 4/4/25 5:02 AM, 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>

Reviewed-by: Dave Jiang <dave.jiang@...el.com>
> ---
>  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 a40fb2fd5006..f8129d2d53f1 100644
> --- a/drivers/dma/idxd/init.c
> +++ b/drivers/dma/idxd/init.c
> @@ -407,14 +407,9 @@ 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);
>  }
>