linux-kernel - Re: [PATCH v3 9/9] dmaengine: idxd: Refactor remove call with idxd

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Message-ID: <363ccf3a-4661-4fa5-8ba3-2453c1f1c423@nvidia.com>
Date: Wed, 2 Apr 2025 16:32:42 -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 9/9] dmaengine: idxd: Refactor remove call with
 idxd_cleanup() helper


On 3/8/25 22:20, Shuai Xue wrote:
> The idxd_cleanup() helper cleans up perfmon, interrupts, internals and
> so on. Refactor remove call with the idxd_cleanup() helper to avoid code
> duplication. Note, this also fixes the missing put_device() for idxd
> groups, enginces and wqs.
>
> Fixes: bfe1d56091c1 ("dmaengine: idxd: Init and probe for Intel data accelerators")
> Cc: stable@...r.kernel.org
> Suggested-by: Vinicius Costa Gomes <vinicius.gomes@...el.com>
> Signed-off-by: Shuai Xue <xueshuai@...ux.alibaba.com>

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

Thanks.

-Fenghua

> ---
>   drivers/dma/idxd/init.c | 14 ++------------
>   1 file changed, 2 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
> index ecb8d534fac4..22b411b470be 100644
> --- a/drivers/dma/idxd/init.c
> +++ b/drivers/dma/idxd/init.c
> @@ -1310,7 +1310,6 @@ static void idxd_shutdown(struct pci_dev *pdev)
>   static void idxd_remove(struct pci_dev *pdev)
>   {
>   	struct idxd_device *idxd = pci_get_drvdata(pdev);
> -	struct idxd_irq_entry *irq_entry;
>   
>   	idxd_unregister_devices(idxd);
>   	/*
> @@ -1323,21 +1322,12 @@ static void idxd_remove(struct pci_dev *pdev)
>   	get_device(idxd_confdev(idxd));
>   	device_unregister(idxd_confdev(idxd));
>   	idxd_shutdown(pdev);
> -	if (device_pasid_enabled(idxd))
> -		idxd_disable_system_pasid(idxd);
>   	idxd_device_remove_debugfs(idxd);
> -
> -	irq_entry = idxd_get_ie(idxd, 0);
> -	free_irq(irq_entry->vector, irq_entry);
> -	pci_free_irq_vectors(pdev);
> +	idxd_cleanup(idxd);
>   	pci_iounmap(pdev, idxd->reg_base);
> -	if (device_user_pasid_enabled(idxd))
> -		idxd_disable_sva(pdev);
> -	pci_disable_device(pdev);
> -	destroy_workqueue(idxd->wq);
> -	perfmon_pmu_remove(idxd);
>   	put_device(idxd_confdev(idxd));
>   	idxd_free(idxd);
> +	pci_disable_device(pdev);
>   }
>   
>   static struct pci_driver idxd_pci_driver = {