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* [PATCH] clocksource: timer-digicolor:  Fix resource leaks in error paths.
@ 2017-06-28 10:38 Arvind Yadav
  0 siblings, 0 replies; 5+ messages in thread
From: Arvind Yadav @ 2017-06-28 10:38 UTC (permalink / raw)
  To: daniel.lezcano, tglx; +Cc: linux-kernel

Handle return value of clk_prepare_enable. In case of error at init time,
rollback iomapping and unprepare clk.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
---
 drivers/clocksource/timer-integrator-ap.c | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/drivers/clocksource/timer-integrator-ap.c b/drivers/clocksource/timer-integrator-ap.c
index 04ad306..27de3f5 100644
--- a/drivers/clocksource/timer-integrator-ap.c
+++ b/drivers/clocksource/timer-integrator-ap.c
@@ -183,6 +183,7 @@ static int __init integrator_ap_timer_init_of(struct device_node *node)
 	unsigned long rate;
 	struct device_node *pri_node;
 	struct device_node *sec_node;
+	struct resource res;
 
 	base = of_io_request_and_map(node, 0, "integrator-timer");
 	if (IS_ERR(base))
@@ -191,9 +192,13 @@ static int __init integrator_ap_timer_init_of(struct device_node *node)
 	clk = of_clk_get(node, 0);
 	if (IS_ERR(clk)) {
 		pr_err("No clock for %s\n", node->name);
-		return PTR_ERR(clk);
+		err = PTR_ERR(clk);
+		goto err_mem;
 	}
-	clk_prepare_enable(clk);
+	err = clk_prepare_enable(clk);
+	if (err)
+		goto err_clk_put;
+
 	rate = clk_get_rate(clk);
 	writel(0, base + TIMER_CTRL);
 
@@ -201,7 +206,7 @@ static int __init integrator_ap_timer_init_of(struct device_node *node)
 				"arm,timer-primary", &path);
 	if (err) {
 		pr_warn("Failed to read property\n");
-		return err;
+		goto err_clk_disable;
 	}
 
 	pri_node = of_find_node_by_path(path);
@@ -210,7 +215,7 @@ static int __init integrator_ap_timer_init_of(struct device_node *node)
 				"arm,timer-secondary", &path);
 	if (err) {
 		pr_warn("Failed to read property\n");
-		return err;
+		goto err_clk_disable;
 	}
 
 
@@ -230,6 +235,16 @@ static int __init integrator_ap_timer_init_of(struct device_node *node)
 	clk_disable_unprepare(clk);
 
 	return 0;
+
+err_clk_disable:
+	clk_disable_unprepare(clk);
+err_clk_put:
+	clk_put(clk);
+err_mem:
+	iounmap(base);
+	of_address_to_resource(node, 0, &res);
+	release_mem_region(res.start, resource_size(&res));
+	return err;
 }
 
 CLOCKSOURCE_OF_DECLARE(integrator_ap_timer, "arm,integrator-timer",
-- 
1.9.1

^ permalink raw reply related	[flat|nested] 5+ messages in thread
* Re: [PATCH] clocksource: timer-digicolor:  Fix resource leaks in error paths.
  2017-06-28  8:45 ` Arvind Yadav
@ 2017-06-28 17:58   ` Baruch Siach
  -1 siblings, 0 replies; 5+ messages in thread
From: Baruch Siach @ 2017-06-28 17:58 UTC (permalink / raw)
  To: Arvind Yadav; +Cc: daniel.lezcano, tglx, linux-arm-kernel, linux-kernel

Hi Arvind,

On Wed, Jun 28, 2017 at 02:15:23PM +0530, Arvind Yadav wrote:
> Handle return value of clk_prepare_enable. In case of error at init time,
> rollback iomapping and unprepare clk.

A failure in digicolor_timer_init() means that the system doesn't boot. I'm 
not sure how useful the cleanup code would be what that happens.

baruch

> Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
> ---
>  drivers/clocksource/timer-digicolor.c | 20 ++++++++++++++++----
>  1 file changed, 16 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/clocksource/timer-digicolor.c b/drivers/clocksource/timer-digicolor.c
> index 94a161e..9360b46 100644
> --- a/drivers/clocksource/timer-digicolor.c
> +++ b/drivers/clocksource/timer-digicolor.c
> @@ -168,15 +168,20 @@ 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\n");
> -		return -EINVAL;
> +		ret = -EINVAL;
> +		goto err_iounmap;
>  	}
>  
>  	clk = of_clk_get(node, 0);
>  	if (IS_ERR(clk)) {
>  		pr_err("Can't get timer clock\n");
> -		return PTR_ERR(clk);
> +		ret = PTR_ERR(clk);
> +		goto err_iounmap;
>  	}
> -	clk_prepare_enable(clk);
> +	ret = clk_prepare_enable(clk);
> +	if (ret)
> +		goto err_clk_put;
> +
>  	rate = clk_get_rate(clk);
>  	dc_timer_dev.ticks_per_jiffy = DIV_ROUND_UP(rate, HZ);
>  
> @@ -193,7 +198,7 @@ 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);
> -		return ret;
> +		goto err_unprepare;
>  	}
>  
>  	dc_timer_dev.ce.cpumask = cpu_possible_mask;
> @@ -202,6 +207,13 @@ static int __init digicolor_timer_init(struct device_node *node)
>  	clockevents_config_and_register(&dc_timer_dev.ce, rate, 0, 0xffffffff);
>  
>  	return 0;
> +err_unprepare:
> +	clk_disable_unprepare(clk);
> +err_clk_put:
> +	clk_put(clk);
> +err_iounmap:
> +	iounmap(dc_timer_dev.base);
> +	return ret;
>  }
>  CLOCKSOURCE_OF_DECLARE(conexant_digicolor, "cnxt,cx92755-timer",
>  		       digicolor_timer_init);

-- 
     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 -

^ permalink raw reply	[flat|nested] 5+ messages in thread
* [PATCH] clocksource: timer-digicolor:  Fix resource leaks in error paths.
@ 2017-06-28 17:58   ` Baruch Siach
  0 siblings, 0 replies; 5+ messages in thread
From: Baruch Siach @ 2017-06-28 17:58 UTC (permalink / raw)
  To: linux-arm-kernel

Hi Arvind,

On Wed, Jun 28, 2017 at 02:15:23PM +0530, Arvind Yadav wrote:
> Handle return value of clk_prepare_enable. In case of error at init time,
> rollback iomapping and unprepare clk.

A failure in digicolor_timer_init() means that the system doesn't boot. I'm 
not sure how useful the cleanup code would be what that happens.

baruch

> Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
> ---
>  drivers/clocksource/timer-digicolor.c | 20 ++++++++++++++++----
>  1 file changed, 16 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/clocksource/timer-digicolor.c b/drivers/clocksource/timer-digicolor.c
> index 94a161e..9360b46 100644
> --- a/drivers/clocksource/timer-digicolor.c
> +++ b/drivers/clocksource/timer-digicolor.c
> @@ -168,15 +168,20 @@ 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\n");
> -		return -EINVAL;
> +		ret = -EINVAL;
> +		goto err_iounmap;
>  	}
>  
>  	clk = of_clk_get(node, 0);
>  	if (IS_ERR(clk)) {
>  		pr_err("Can't get timer clock\n");
> -		return PTR_ERR(clk);
> +		ret = PTR_ERR(clk);
> +		goto err_iounmap;
>  	}
> -	clk_prepare_enable(clk);
> +	ret = clk_prepare_enable(clk);
> +	if (ret)
> +		goto err_clk_put;
> +
>  	rate = clk_get_rate(clk);
>  	dc_timer_dev.ticks_per_jiffy = DIV_ROUND_UP(rate, HZ);
>  
> @@ -193,7 +198,7 @@ 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);
> -		return ret;
> +		goto err_unprepare;
>  	}
>  
>  	dc_timer_dev.ce.cpumask = cpu_possible_mask;
> @@ -202,6 +207,13 @@ static int __init digicolor_timer_init(struct device_node *node)
>  	clockevents_config_and_register(&dc_timer_dev.ce, rate, 0, 0xffffffff);
>  
>  	return 0;
> +err_unprepare:
> +	clk_disable_unprepare(clk);
> +err_clk_put:
> +	clk_put(clk);
> +err_iounmap:
> +	iounmap(dc_timer_dev.base);
> +	return ret;
>  }
>  CLOCKSOURCE_OF_DECLARE(conexant_digicolor, "cnxt,cx92755-timer",
>  		       digicolor_timer_init);

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

^ permalink raw reply	[flat|nested] 5+ messages in thread
* [PATCH] clocksource: timer-digicolor:  Fix resource leaks in error paths.
@ 2017-06-28  8:45 ` Arvind Yadav
  0 siblings, 0 replies; 5+ messages in thread
From: Arvind Yadav @ 2017-06-28  8:45 UTC (permalink / raw)
  To: baruch, daniel.lezcano, tglx; +Cc: linux-arm-kernel, linux-kernel

Handle return value of clk_prepare_enable. In case of error at init time,
rollback iomapping and unprepare clk.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
---
 drivers/clocksource/timer-digicolor.c | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/drivers/clocksource/timer-digicolor.c b/drivers/clocksource/timer-digicolor.c
index 94a161e..9360b46 100644
--- a/drivers/clocksource/timer-digicolor.c
+++ b/drivers/clocksource/timer-digicolor.c
@@ -168,15 +168,20 @@ 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\n");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto err_iounmap;
 	}
 
 	clk = of_clk_get(node, 0);
 	if (IS_ERR(clk)) {
 		pr_err("Can't get timer clock\n");
-		return PTR_ERR(clk);
+		ret = PTR_ERR(clk);
+		goto err_iounmap;
 	}
-	clk_prepare_enable(clk);
+	ret = clk_prepare_enable(clk);
+	if (ret)
+		goto err_clk_put;
+
 	rate = clk_get_rate(clk);
 	dc_timer_dev.ticks_per_jiffy = DIV_ROUND_UP(rate, HZ);
 
@@ -193,7 +198,7 @@ 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);
-		return ret;
+		goto err_unprepare;
 	}
 
 	dc_timer_dev.ce.cpumask = cpu_possible_mask;
@@ -202,6 +207,13 @@ static int __init digicolor_timer_init(struct device_node *node)
 	clockevents_config_and_register(&dc_timer_dev.ce, rate, 0, 0xffffffff);
 
 	return 0;
+err_unprepare:
+	clk_disable_unprepare(clk);
+err_clk_put:
+	clk_put(clk);
+err_iounmap:
+	iounmap(dc_timer_dev.base);
+	return ret;
 }
 CLOCKSOURCE_OF_DECLARE(conexant_digicolor, "cnxt,cx92755-timer",
 		       digicolor_timer_init);
-- 
1.9.1

^ permalink raw reply related	[flat|nested] 5+ messages in thread
* [PATCH] clocksource: timer-digicolor: Fix resource leaks in error paths.
@ 2017-06-28  8:45 ` Arvind Yadav
  0 siblings, 0 replies; 5+ messages in thread
From: Arvind Yadav @ 2017-06-28  8:45 UTC (permalink / raw)
  To: linux-arm-kernel

Handle return value of clk_prepare_enable. In case of error at init time,
rollback iomapping and unprepare clk.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
---
 drivers/clocksource/timer-digicolor.c | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/drivers/clocksource/timer-digicolor.c b/drivers/clocksource/timer-digicolor.c
index 94a161e..9360b46 100644
--- a/drivers/clocksource/timer-digicolor.c
+++ b/drivers/clocksource/timer-digicolor.c
@@ -168,15 +168,20 @@ 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\n");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto err_iounmap;
 	}
 
 	clk = of_clk_get(node, 0);
 	if (IS_ERR(clk)) {
 		pr_err("Can't get timer clock\n");
-		return PTR_ERR(clk);
+		ret = PTR_ERR(clk);
+		goto err_iounmap;
 	}
-	clk_prepare_enable(clk);
+	ret = clk_prepare_enable(clk);
+	if (ret)
+		goto err_clk_put;
+
 	rate = clk_get_rate(clk);
 	dc_timer_dev.ticks_per_jiffy = DIV_ROUND_UP(rate, HZ);
 
@@ -193,7 +198,7 @@ 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);
-		return ret;
+		goto err_unprepare;
 	}
 
 	dc_timer_dev.ce.cpumask = cpu_possible_mask;
@@ -202,6 +207,13 @@ static int __init digicolor_timer_init(struct device_node *node)
 	clockevents_config_and_register(&dc_timer_dev.ce, rate, 0, 0xffffffff);
 
 	return 0;
+err_unprepare:
+	clk_disable_unprepare(clk);
+err_clk_put:
+	clk_put(clk);
+err_iounmap:
+	iounmap(dc_timer_dev.base);
+	return ret;
 }
 CLOCKSOURCE_OF_DECLARE(conexant_digicolor, "cnxt,cx92755-timer",
 		       digicolor_timer_init);
-- 
1.9.1

^ permalink raw reply related	[flat|nested] 5+ messages in thread
end of thread, other threads:[~2017-06-28 17:58 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-06-28 10:38 [PATCH] clocksource: timer-digicolor: Fix resource leaks in error paths Arvind Yadav
  -- strict thread matches above, loose matches on Subject: below --
2017-06-28  8:45 Arvind Yadav
2017-06-28  8:45 ` Arvind Yadav
2017-06-28 17:58 ` Baruch Siach
2017-06-28 17:58   ` Baruch Siach

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