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From: Mike Turquette <mturquette@linaro.org>
To: Maxime Ripard <maxime.ripard@free-electrons.com>,
	"Emilio Lopez" <emilio@elopez.com.ar>,
	"Dan Williams" <dan.j.williams@intel.com>,
	"Vinod Koul" <vinod.koul@intel.com>
Cc: linux-arm-kernel@lists.infradead.org, dmaengine@vger.kernel.org,
	linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
	linux-sunxi@googlegroups.com, kevin.z.m.zh@gmail.com,
	sunny@allwinnertech.com, shuge@allwinnertech.com,
	zhuzhenhua@allwinnertech.com, andriy.shevchenko@intel.com,
	"Maxime Ripard" <maxime.ripard@free-electrons.com>
Subject: Re: [PATCH v5 1/7] clk: sunxi: Remove calls to clk_put
Date: Mon, 24 Mar 2014 14:51:20 -0700	[thread overview]
Message-ID: <20140324215120.32624.63543@quantum> (raw)
In-Reply-To: <1394723659-4995-2-git-send-email-maxime.ripard@free-electrons.com>

Quoting Maxime Ripard (2014-03-13 08:14:13)
> Callers of clk_put must disable the clock first. This also means that as long
> as the clock is enabled the driver should hold a reference to that clock.
> Hence, the call to clk_put here are bogus and should be removed.
> 
> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

Looks good to me. There is a balanced clk_put in the module remove
function?

Regards,
Mike

> ---
>  drivers/clk/sunxi/clk-sunxi.c | 8 ++------
>  1 file changed, 2 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
> index 23baad9d934a..7119c02c9fa8 100644
> --- a/drivers/clk/sunxi/clk-sunxi.c
> +++ b/drivers/clk/sunxi/clk-sunxi.c
> @@ -1290,17 +1290,13 @@ static void __init sunxi_clock_protect(void)
>  
>         /* memory bus clock - sun5i+ */
>         clk = clk_get(NULL, "mbus");
> -       if (!IS_ERR(clk)) {
> +       if (!IS_ERR(clk))
>                 clk_prepare_enable(clk);
> -               clk_put(clk);
> -       }
>  
>         /* DDR clock - sun4i+ */
>         clk = clk_get(NULL, "pll5_ddr");
> -       if (!IS_ERR(clk)) {
> +       if (!IS_ERR(clk))
>                 clk_prepare_enable(clk);
> -               clk_put(clk);
> -       }
>  }
>  
>  static void __init sunxi_init_clocks(void)
> -- 
> 1.9.0
> 

  reply	other threads:[~2014-03-24 21:51 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-03-13 15:14 [PATCH v5 0/7] Add support for the Allwinner A31 DMA Controller Maxime Ripard
2014-03-13 15:14 ` [PATCH v5 1/7] clk: sunxi: Remove calls to clk_put Maxime Ripard
2014-03-24 21:51   ` Mike Turquette [this message]
2014-03-25  7:50     ` Maxime Ripard
2014-03-13 15:14 ` [PATCH v5 2/7] ARM: sunxi: Split out the various machines into separate files Maxime Ripard
2014-03-13 15:14 ` [PATCH v5 3/7] ARM: sunxi: Move the clock protection to machine hooks Maxime Ripard
2014-03-13 15:14 ` [PATCH v5 4/7] ARM: sun6i: Protect CPU clock Maxime Ripard
2014-03-13 15:14 ` [PATCH v5 5/7] ARM: sun6i: Protect SDRAM gating bit Maxime Ripard
2014-03-13 15:14 ` [PATCH v5 6/7] DMA: sun6i: Add driver for the Allwinner A31 DMA controller Maxime Ripard
2014-03-21 16:51   ` Arnd Bergmann
2014-03-13 15:14 ` [PATCH v5 7/7] ARM: sun6i: dt: Add A31 DMA controller to DTSI Maxime Ripard
2014-04-23 12:35   ` Arnd Bergmann
2014-04-23 13:10     ` Maxime Ripard
2014-03-28 15:26 ` [PATCH v5 0/7] Add support for the Allwinner A31 DMA Controller Maxime Ripard
2014-04-08  8:28 ` Maxime Ripard

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