Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1488929 > unrolled thread

[PATCH] clocksource: timer-digicolor: Unmap region obtained by of_iomap

Back to article view | Back to linux.kernel

Contents

  [PATCH] clocksource: timer-digicolor: Unmap region obtained by of_iomap Arvind Yadav <arvind.yadav.cs@gmail.com> - 2016-09-22 16:30 +0200
    Re: [PATCH] clocksource: timer-digicolor: Unmap region obtained by  of_iomap Baruch Siach <baruch@tkos.co.il> - 2016-09-22 16:50 +0200

#1488929 — [PATCH] clocksource: timer-digicolor: Unmap region obtained by of_iomap

Free memory mapping, if digicolor_timer_init is not successful.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
---
 drivers/clocksource/timer-digicolor.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/clocksource/timer-digicolor.c b/drivers/clocksource/timer-digicolor.c
index 10318cc..e6e5e6a 100644
--- a/drivers/clocksource/timer-digicolor.c
+++ b/drivers/clocksource/timer-digicolor.c
@@ -167,12 +167,14 @@ static int __init digicolor_timer_init(struct device_node *node)
 	irq = irq_of_parse_and_map(node, dc_timer_dev.timer_id);
 	if (irq <= 0) {
 		pr_err("Can't parse IRQ");
+		iounmap(dc_timer_dev.base);
 		return -EINVAL;
 	}
 
 	clk = of_clk_get(node, 0);
 	if (IS_ERR(clk)) {
 		pr_err("Can't get timer clock");
+		iounmap(dc_timer_dev.base);
 		return PTR_ERR(clk);
 	}
 	clk_prepare_enable(clk);
@@ -192,6 +194,7 @@ static int __init digicolor_timer_init(struct device_node *node)
 			  &dc_timer_dev.ce);
 	if (ret) {
 		pr_warn("request of timer irq %d failed (%d)\n", irq, ret);
+		iounmap(dc_timer_dev.base);
 		return ret;
 	}
 
-- 
2.7.4

[toc] | [next] | [standalone]

#1488948 — Re: [PATCH] clocksource: timer-digicolor: Unmap region obtained by of_iomap

Hi Arvind Yadav,

On Thu, Sep 22, 2016 at 07:51:13PM +0530, Arvind Yadav wrote:
> Free memory mapping, if digicolor_timer_init is not successful.

Thanks for looking into that.

Why not add a devm_of_iomap() variant of of_iomap() that calls devm_ioremap() 
instead of ioremap()?

I'm not sure that cleaning up after a clocksource driver init failure makes 
much sense. Something is clearly fundamentally wrong in your device tree, and 
your system will most likely not boot anyway.

baruch

> Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
> ---
>  drivers/clocksource/timer-digicolor.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/clocksource/timer-digicolor.c b/drivers/clocksource/timer-digicolor.c
> index 10318cc..e6e5e6a 100644
> --- a/drivers/clocksource/timer-digicolor.c
> +++ b/drivers/clocksource/timer-digicolor.c
> @@ -167,12 +167,14 @@ static int __init digicolor_timer_init(struct device_node *node)
>  	irq = irq_of_parse_and_map(node, dc_timer_dev.timer_id);
>  	if (irq <= 0) {
>  		pr_err("Can't parse IRQ");
> +		iounmap(dc_timer_dev.base);
>  		return -EINVAL;
>  	}
>  
>  	clk = of_clk_get(node, 0);
>  	if (IS_ERR(clk)) {
>  		pr_err("Can't get timer clock");
> +		iounmap(dc_timer_dev.base);
>  		return PTR_ERR(clk);
>  	}
>  	clk_prepare_enable(clk);
> @@ -192,6 +194,7 @@ static int __init digicolor_timer_init(struct device_node *node)
>  			  &dc_timer_dev.ce);
>  	if (ret) {
>  		pr_warn("request of timer irq %d failed (%d)\n", irq, ret);
> +		iounmap(dc_timer_dev.base);
>  		return ret;
>  	}

-- 
     http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
=}------------------------------------------------ooO--U--Ooo------------{=
   - baruch@tkos.co.il - tel: +972.52.368.4656, http://www.tkos.co.il -

[toc] | [prev] | [standalone]

Back to top | Article view | linux.kernel

csiph-web