All of lore.kernel.org
 help / color / mirror / Atom feed
From: mturquette@linaro.org (Mike Turquette)
To: linux-arm-kernel@lists.infradead.org
Subject: [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
> 

WARNING: multiple messages have this Message-ID (diff)
From: Mike Turquette <mturquette-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
To: Emilio Lopez <emilio-0Z03zUJReD5OxF6Tv1QG9Q@public.gmane.org>,
	Dan Williams
	<dan.j.williams-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Vinod Koul <vinod.koul-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	dmaengine-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org,
	kevin.z.m.zh-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
	sunny-0TFLnhJekD6UEPyfVivIlAC/G2K4zDHf@public.gmane.org,
	shuge-0TFLnhJekD6UEPyfVivIlAC/G2K4zDHf@public.gmane.org,
	zhuzhenhua-0TFLnhJekD6UEPyfVivIlAC/G2K4zDHf@public.gmane.org,
	andriy.shevchenko-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
	Maxime Ripard
	<maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
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-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>

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-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>

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
> 

WARNING: multiple messages have this Message-ID (diff)
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: 44+ 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 ` Maxime Ripard
2014-03-13 15:14 ` Maxime Ripard
2014-03-13 15:14 ` [PATCH v5 1/7] clk: sunxi: Remove calls to clk_put Maxime Ripard
2014-03-13 15:14   ` Maxime Ripard
2014-03-13 15:14   ` Maxime Ripard
2014-03-24 21:51   ` Mike Turquette [this message]
2014-03-24 21:51     ` Mike Turquette
2014-03-24 21:51     ` Mike Turquette
2014-03-25  7:50     ` Maxime Ripard
2014-03-25  7:50       ` Maxime Ripard
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   ` Maxime Ripard
2014-03-13 15:14   ` 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   ` Maxime Ripard
2014-03-13 15:14   ` Maxime Ripard
2014-03-13 15:14 ` [PATCH v5 4/7] ARM: sun6i: Protect CPU clock Maxime Ripard
2014-03-13 15:14   ` Maxime Ripard
2014-03-13 15:14   ` Maxime Ripard
2014-03-13 15:14 ` [PATCH v5 5/7] ARM: sun6i: Protect SDRAM gating bit Maxime Ripard
2014-03-13 15:14   ` Maxime Ripard
2014-03-13 15:14   ` Maxime Ripard
2014-03-13 15:14 ` [PATCH v5 6/7] DMA: sun6i: Add driver for the Allwinner A31 DMA controller Maxime Ripard
2014-03-13 15:14   ` Maxime Ripard
2014-03-13 15:14   ` Maxime Ripard
2014-03-21 16:51   ` Arnd Bergmann
2014-03-21 16:51     ` Arnd Bergmann
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
2014-03-13 15:14   ` Maxime Ripard
2014-03-13 15:14   ` Maxime Ripard
2014-04-23 12:35   ` Arnd Bergmann
2014-04-23 12:35     ` Arnd Bergmann
2014-04-23 13:10     ` Maxime Ripard
2014-04-23 13:10       ` Maxime Ripard
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
2014-03-28 15:26   ` Maxime Ripard
2014-03-28 15:26   ` Maxime Ripard
2014-04-08  8:28 ` Maxime Ripard
2014-04-08  8:28   ` Maxime Ripard
2014-04-08  8:28   ` Maxime Ripard

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20140324215120.32624.63543@quantum \
    --to=mturquette@linaro.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.