linux-kernel - Re: [PATCH] intel-iommu: Add device info into list before doing context mapping

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Date:	Tue, 20 Dec 2011 08:07:30 -0800
From:	Chris Wright <chrisw@...s-sol.org>
To:	"Hao, Xudong" <xudong.hao@...el.com>
Cc:	"iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
	"dwmw2@...radead.org" <dwmw2@...radead.org>,
	"Zhang, Xiantao" <xiantao.zhang@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>
Subject: Re: [PATCH] intel-iommu: Add device info into list before doing
 context mapping

* Hao, Xudong (xudong.hao@...el.com) wrote:
> @@ -2282,6 +2276,14 @@ static int domain_add_dev_info(struct dmar_domain *domain,
>  	pdev->dev.archdata.iommu = info;
>  	spin_unlock_irqrestore(&device_domain_lock, flags);
>  
> +	ret = domain_context_mapping(domain, pdev, translation);
> +	if (ret) {
> +		list_del(&info->link);
> +		list_del(&info->global);

At the very least, this is not correct locking.

> +		free_devinfo_mem(info);
> +		return ret;
> +	}
> +
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