linux-kernel - Re: [PATCH v4 2/2] iommu/exynos: Add iommu driver for Exynos Platforms

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Message-ID: <CAK=WgbZ4RjJXjCXeN-rg84OLv1KZiWAAXXTWXknn_Gt4eioqDA@mail.gmail.com>
Date:	Wed, 12 Oct 2011 10:22:54 +0200
From:	Ohad Ben-Cohen <ohad@...ery.com>
To:	pullip.cho@...sung.com
Cc:	Linux ARM Kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-samsung-soc@...r.kernel.org,
	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	Russell King <rmk+kernel@....linux.org.uk>,
	joerg.roedel@....com, Sanghyun Lee <sanghyun75.lee@...sung.com>,
	younglak1004.kim@...sung.com, Kukjin Kim <kgene.kim@...sung.com>
Subject: Re: [PATCH v4 2/2] iommu/exynos: Add iommu driver for Exynos Platforms

Hi KyongHo,

On Wed, Oct 12, 2011 at 10:07 AM, KyongHo Cho <pullip.cho@...sung.com> wrote:
> +static int exynos_iommu_unmap(struct iommu_domain *domain, unsigned long
> iova,
> +                          int gfp_order)
> +{
...
> +       return 0;
> +}

->unmap() should return the size of the unmapped region (in page order
atm); this is already expected by mainline users of the IOMMU API
today, and will also be used by the iommu core itself soon.

Ohad.
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