linux-kernel - Re: [PATCH v6 3/7] iommu/exynos: Simplify internal enable/disable functions

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Date:   Thu, 10 Nov 2016 17:40:03 +0100
From:   Joerg Roedel <joro@...tes.org>
To:     Marek Szyprowski <m.szyprowski@...sung.com>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        iommu@...ts.linux-foundation.org,
        linux-samsung-soc@...r.kernel.org, Inki Dae <inki.dae@...sung.com>,
        Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Mark Brown <broonie@...nel.org>,
        "Luis R. Rodriguez" <mcgrof@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Lukas Wunner <lukas@...ner.de>,
        Kevin Hilman <khilman@...nel.org>,
        Tobias Jakobi <tjakobi@...h.uni-bielefeld.de>,
        Tomasz Figa <tomasz.figa@...il.com>
Subject: Re: [PATCH v6 3/7] iommu/exynos: Simplify internal enable/disable
 functions

On Tue, Nov 08, 2016 at 02:29:20PM +0100, Marek Szyprowski wrote:
> Remove remaining leftovers of the ref-count related code in the
> __sysmmu_enable/disable functions inline __sysmmu_enable/disable_nocount
> to them. Suspend/resume callbacks now checks if master device is set for
> given SYSMMU controller instead of relying on the activation count.
> 
> Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
> ---
>  drivers/iommu/exynos-iommu.c | 104 ++++++++++++-------------------------------
>  1 file changed, 29 insertions(+), 75 deletions(-)
> 
> diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
> index 4056228..f45b274 100644
> --- a/drivers/iommu/exynos-iommu.c
> +++ b/drivers/iommu/exynos-iommu.c
> @@ -237,8 +237,8 @@ struct sysmmu_drvdata {
>  	struct clk *aclk;		/* SYSMMU's aclk clock */
>  	struct clk *pclk;		/* SYSMMU's pclk clock */
>  	struct clk *clk_master;		/* master's device clock */
> -	int activations;		/* number of calls to sysmmu_enable */
>  	spinlock_t lock;		/* lock for modyfying state */
> +	int active;			/* current status */

Any reason for this being int and not bool? You only assign true/false
later.


	Joerg