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From: Chen-Yu Tsai <wens@csie.org>
To: Dinghao Liu <dinghao.liu@zju.edu.cn>
Cc: Kangjie Lu <kjlu@umn.edu>,
	linux-rtc@vger.kernel.org,
	Alessandro Zummo <a.zummo@towertech.it>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	Maxime Ripard <mripard@kernel.org>,
	linux-arm-kernel <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH] rtc: sun6i: Fix memleak in sun6i_rtc_clk_init
Date: Tue, 25 Aug 2020 22:51:33 +0800	[thread overview]
Message-ID: <CAGb2v640zTha1tzjOo3L+=T=N3hDRG+8qf2xu+bD8BMUnkhORQ@mail.gmail.com> (raw)
In-Reply-To: <20200823075815.23457-1-dinghao.liu@zju.edu.cn>

On Sun, Aug 23, 2020 at 3:59 PM Dinghao Liu <dinghao.liu@zju.edu.cn> wrote:
>
> When clk_hw_register_fixed_rate_with_accuracy() fails,
> clk_data should be freed. It's the same for the subsequent
> error paths.

I suppose you should also unregister the already registered clocks
in the latter two error paths?

> Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
> ---
>  drivers/rtc/rtc-sun6i.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/rtc/rtc-sun6i.c b/drivers/rtc/rtc-sun6i.c
> index e2b8b150bcb4..a837c5a40508 100644
> --- a/drivers/rtc/rtc-sun6i.c
> +++ b/drivers/rtc/rtc-sun6i.c
> @@ -272,7 +272,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
>                                                                 300000000);
>         if (IS_ERR(rtc->int_osc)) {
>                 pr_crit("Couldn't register the internal oscillator\n");
> -               return;
> +               goto err;
>         }
>
>         parents[0] = clk_hw_get_name(rtc->int_osc);
> @@ -290,7 +290,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
>         rtc->losc = clk_register(NULL, &rtc->hw);
>         if (IS_ERR(rtc->losc)) {
>                 pr_crit("Couldn't register the LOSC clock\n");
> -               return;
> +               goto err;
>         }
>
>         of_property_read_string_index(node, "clock-output-names", 1,
> @@ -301,7 +301,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
>                                           &rtc->lock);
>         if (IS_ERR(rtc->ext_losc)) {
>                 pr_crit("Couldn't register the LOSC external gate\n");
> -               return;
> +               goto err;
>         }
>
>         clk_data->num = 2;
> --
> 2.17.1
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
From: Chen-Yu Tsai <wens@csie.org>
To: Dinghao Liu <dinghao.liu@zju.edu.cn>
Cc: linux-rtc@vger.kernel.org,
	Alessandro Zummo <a.zummo@towertech.it>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	Kangjie Lu <kjlu@umn.edu>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	Maxime Ripard <mripard@kernel.org>,
	linux-arm-kernel <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH] rtc: sun6i: Fix memleak in sun6i_rtc_clk_init
Date: Tue, 25 Aug 2020 22:51:33 +0800	[thread overview]
Message-ID: <CAGb2v640zTha1tzjOo3L+=T=N3hDRG+8qf2xu+bD8BMUnkhORQ@mail.gmail.com> (raw)
In-Reply-To: <20200823075815.23457-1-dinghao.liu@zju.edu.cn>

On Sun, Aug 23, 2020 at 3:59 PM Dinghao Liu <dinghao.liu@zju.edu.cn> wrote:
>
> When clk_hw_register_fixed_rate_with_accuracy() fails,
> clk_data should be freed. It's the same for the subsequent
> error paths.

I suppose you should also unregister the already registered clocks
in the latter two error paths?

> Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
> ---
>  drivers/rtc/rtc-sun6i.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/rtc/rtc-sun6i.c b/drivers/rtc/rtc-sun6i.c
> index e2b8b150bcb4..a837c5a40508 100644
> --- a/drivers/rtc/rtc-sun6i.c
> +++ b/drivers/rtc/rtc-sun6i.c
> @@ -272,7 +272,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
>                                                                 300000000);
>         if (IS_ERR(rtc->int_osc)) {
>                 pr_crit("Couldn't register the internal oscillator\n");
> -               return;
> +               goto err;
>         }
>
>         parents[0] = clk_hw_get_name(rtc->int_osc);
> @@ -290,7 +290,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
>         rtc->losc = clk_register(NULL, &rtc->hw);
>         if (IS_ERR(rtc->losc)) {
>                 pr_crit("Couldn't register the LOSC clock\n");
> -               return;
> +               goto err;
>         }
>
>         of_property_read_string_index(node, "clock-output-names", 1,
> @@ -301,7 +301,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
>                                           &rtc->lock);
>         if (IS_ERR(rtc->ext_losc)) {
>                 pr_crit("Couldn't register the LOSC external gate\n");
> -               return;
> +               goto err;
>         }
>
>         clk_data->num = 2;
> --
> 2.17.1
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2020-08-25 14:51 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-23  7:58 [PATCH] rtc: sun6i: Fix memleak in sun6i_rtc_clk_init Dinghao Liu
2020-08-23  7:58 ` Dinghao Liu
2020-08-25 14:51 ` Chen-Yu Tsai [this message]
2020-08-25 14:51   ` Chen-Yu Tsai
2020-08-26  8:55   ` dinghao.liu
2020-08-26  8:55     ` dinghao.liu
2020-10-09 20:57     ` Alexandre Belloni
2020-10-09 20:57       ` Alexandre Belloni
2020-10-18  6:00       ` dinghao.liu
2020-10-18  6:00         ` dinghao.liu

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