[PATCH v5 0/3] arm: mvebu: fix resource leak

[PATCH v5 0/3] arm: mvebu: fix resource leak

[Jisheng Zhang]

These patches try to fix resource leak by adding missing of_node_put(),
iounmap or using devm_ioremap_resource() if available.

v5:
  - rebase against mvebu/fixes-non-critical

v4:
  - re-generate since Ezequiel's patches add DT support to the
mvebu-mbus driver

v3:
  - remove the clk patch since it's already taken by Mike
  - Add more commit log as suggested by Ezequiel Garcia

v2:
  - use devm_ioremap_resource() as suggested by Ezequiel Garcia
  - use gates_out instead of bail_out as suggested by Mike Turquette

Jisheng Zhang (3):
  arm: mvebu: add missing of_node_put() to fix reference leak
  bus: mvebu: add missing of_node_put() to fix reference leak
  pinctrl: mvebu: Convert to use devm_ioremap_resource

 arch/arm/mach-mvebu/armada-370-xp.c     |  1 +
 arch/arm/mach-mvebu/coherency.c         |  8 +++++++-
 arch/arm/mach-mvebu/platsmp.c           |  1 +
 arch/arm/mach-mvebu/pmsu.c              |  1 +
 arch/arm/mach-mvebu/system-controller.c |  1 +
 drivers/bus/mvebu-mbus.c                |  6 +++++-
 drivers/pinctrl/mvebu/pinctrl-mvebu.c   | 11 +++++------
 7 files changed, 21 insertions(+), 8 deletions(-)

-- 
1.8.4.rc3

[PATCH v5 1/3] arm: mvebu: add missing of_node_put() to fix reference leak

[Jisheng Zhang]

Add of_node_put to properly decrement the refcount when we are
done using a given node.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Reviewed-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
---
 arch/arm/mach-mvebu/armada-370-xp.c     | 1 +
 arch/arm/mach-mvebu/coherency.c         | 8 +++++++-
 arch/arm/mach-mvebu/platsmp.c           | 1 +
 arch/arm/mach-mvebu/pmsu.c              | 1 +
 arch/arm/mach-mvebu/system-controller.c | 1 +
 5 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-mvebu/armada-370-xp.c b/arch/arm/mach-mvebu/armada-370-xp.c
index 97cbb80..8a1ae83 100644
--- a/arch/arm/mach-mvebu/armada-370-xp.c
+++ b/arch/arm/mach-mvebu/armada-370-xp.c
@@ -64,6 +64,7 @@ static void __init armada_370_xp_mbus_init(void)
 			ARMADA_370_XP_MBUS_WINS_SIZE,
 			of_translate_address(dn, &sdram_wins_offs),
 			ARMADA_370_XP_SDRAM_WINS_SIZE);
+	of_node_put(dn);
 }
 
 static void __init armada_370_xp_timer_and_clk_init(void)
diff --git a/arch/arm/mach-mvebu/coherency.c b/arch/arm/mach-mvebu/coherency.c
index 4c24303..58adf2f 100644
--- a/arch/arm/mach-mvebu/coherency.c
+++ b/arch/arm/mach-mvebu/coherency.c
@@ -140,6 +140,7 @@ int __init coherency_init(void)
 		coherency_base = of_iomap(np, 0);
 		coherency_cpu_base = of_iomap(np, 1);
 		set_cpu_coherent(cpu_logical_map(smp_processor_id()), 0);
+		of_node_put(np);
 	}
 
 	return 0;
@@ -147,9 +148,14 @@ int __init coherency_init(void)
 
 static int __init coherency_late_init(void)
 {
-	if (of_find_matching_node(NULL, of_coherency_table))
+	struct device_node *np;
+
+	np = of_find_matching_node(NULL, of_coherency_table);
+	if (np) {
 		bus_register_notifier(&platform_bus_type,
 				      &mvebu_hwcc_platform_nb);
+		of_node_put(np);
+	}
 	return 0;
 }
 
diff --git a/arch/arm/mach-mvebu/platsmp.c b/arch/arm/mach-mvebu/platsmp.c
index ce81d30..e7edb82 100644
--- a/arch/arm/mach-mvebu/platsmp.c
+++ b/arch/arm/mach-mvebu/platsmp.c
@@ -95,6 +95,7 @@ static void __init armada_xp_smp_init_cpus(void)
 		panic("No 'cpus' node found\n");
 
 	ncores = of_get_child_count(np);
+	of_node_put(np);
 	if (ncores == 0 || ncores > ARMADA_XP_MAX_CPUS)
 		panic("Invalid number of CPUs in DT\n");
 
diff --git a/arch/arm/mach-mvebu/pmsu.c b/arch/arm/mach-mvebu/pmsu.c
index 3cc4bef..27fc4f0 100644
--- a/arch/arm/mach-mvebu/pmsu.c
+++ b/arch/arm/mach-mvebu/pmsu.c
@@ -67,6 +67,7 @@ int __init armada_370_xp_pmsu_init(void)
 		pr_info("Initializing Power Management Service Unit\n");
 		pmsu_mp_base = of_iomap(np, 0);
 		pmsu_reset_base = of_iomap(np, 1);
+		of_node_put(np);
 	}
 
 	return 0;
diff --git a/arch/arm/mach-mvebu/system-controller.c b/arch/arm/mach-mvebu/system-controller.c
index f875124..5175083c 100644
--- a/arch/arm/mach-mvebu/system-controller.c
+++ b/arch/arm/mach-mvebu/system-controller.c
@@ -98,6 +98,7 @@ static int __init mvebu_system_controller_init(void)
 		BUG_ON(!match);
 		system_controller_base = of_iomap(np, 0);
 		mvebu_sc = (struct mvebu_system_controller *)match->data;
+		of_node_put(np);
 	}
 
 	return 0;
-- 
1.8.4.rc3

[PATCH v5 2/3] bus: mvebu: add missing of_node_put() to fix reference leak

[Jisheng Zhang]

Add of_node_put to properly decrement the refcount when we are
done using a given node.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Reviewed-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
---
 drivers/bus/mvebu-mbus.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/mvebu-mbus.c b/drivers/bus/mvebu-mbus.c
index 33c6947..20da90f 100644
--- a/drivers/bus/mvebu-mbus.c
+++ b/drivers/bus/mvebu-mbus.c
@@ -837,6 +837,7 @@ int __init mvebu_mbus_init(const char *soc, phys_addr_t mbuswins_phys_base,
 {
 	struct mvebu_mbus_state *mbus = &mbus_state;
 	const struct of_device_id *of_id;
+	struct device_node *np;
 	int win;
 
 	for (of_id = of_mvebu_mbus_ids; of_id->compatible; of_id++)
@@ -860,8 +861,11 @@ int __init mvebu_mbus_init(const char *soc, phys_addr_t mbuswins_phys_base,
 		return -ENOMEM;
 	}
 
-	if (of_find_compatible_node(NULL, NULL, "marvell,coherency-fabric"))
+	np = of_find_compatible_node(NULL, NULL, "marvell,coherency-fabric");
+	if (np) {
 		mbus->hw_io_coherency = 1;
+		of_node_put(np);
+	}
 
 	for (win = 0; win < mbus->soc->num_wins; win++)
 		mvebu_mbus_disable_window(mbus, win);
-- 
1.8.4.rc3

[PATCH v5 3/3] pinctrl: mvebu: Convert to use devm_ioremap_resource

[Jisheng Zhang]

The resource mapped by of_iomap() isn't unmapped in error path. This
patch fix the resource leakage by using devm_ioremap_resource() instead
of of_iomap().

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Reviewed-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
---
 drivers/pinctrl/mvebu/pinctrl-mvebu.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/pinctrl/mvebu/pinctrl-mvebu.c b/drivers/pinctrl/mvebu/pinctrl-mvebu.c
index bb7ddb1..1caa45f 100644
--- a/drivers/pinctrl/mvebu/pinctrl-mvebu.c
+++ b/drivers/pinctrl/mvebu/pinctrl-mvebu.c
@@ -579,7 +579,7 @@ static int mvebu_pinctrl_build_functions(struct platform_device *pdev,
 int mvebu_pinctrl_probe(struct platform_device *pdev)
 {
 	struct mvebu_pinctrl_soc_info *soc = dev_get_platdata(&pdev->dev);
-	struct device_node *np = pdev->dev.of_node;
+	struct resource *res;
 	struct mvebu_pinctrl *pctl;
 	void __iomem *base;
 	struct pinctrl_pin_desc *pdesc;
@@ -591,11 +591,10 @@ int mvebu_pinctrl_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	base = of_iomap(np, 0);
-	if (!base) {
-		dev_err(&pdev->dev, "unable to get base address\n");
-		return -ENODEV;
-	}
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
 
 	pctl = devm_kzalloc(&pdev->dev, sizeof(struct mvebu_pinctrl),
 			GFP_KERNEL);
-- 
1.8.4.rc3

Re: [PATCH v5 0/3] arm: mvebu: fix resource leak

[Jason Cooper]

Jisheng,

On Tue, Aug 27, 2013 at 12:41:13PM +0800, Jisheng Zhang wrote:
> These patches try to fix resource leak by adding missing of_node_put(),
> iounmap or using devm_ioremap_resource() if available.
> 
> v5:
>   - rebase against mvebu/fixes-non-critical

Thanks!

> v4:
>   - re-generate since Ezequiel's patches add DT support to the
> mvebu-mbus driver
> 
> v3:
>   - remove the clk patch since it's already taken by Mike
>   - Add more commit log as suggested by Ezequiel Garcia
> 
> v2:
>   - use devm_ioremap_resource() as suggested by Ezequiel Garcia
>   - use gates_out instead of bail_out as suggested by Mike Turquette
> 
> Jisheng Zhang (3):
>   arm: mvebu: add missing of_node_put() to fix reference leak
>   bus: mvebu: add missing of_node_put() to fix reference leak

Applied patched 1 and 2 to mvebu/fixes-non-critical,

>   pinctrl: mvebu: Convert to use devm_ioremap_resource

Previously Acked patch 3 for LinusW

thx,

Jason.

Re: [PATCH v5 3/3] pinctrl: mvebu: Convert to use devm_ioremap_resource

[Linus Walleij]

On Tue, Aug 27, 2013 at 6:41 AM, Jisheng Zhang <jszhang@marvell.com> wrote:

> The resource mapped by of_iomap() isn't unmapped in error path. This
> patch fix the resource leakage by using devm_ioremap_resource() instead
> of of_iomap().
>
> Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
> Reviewed-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
> Acked-by: Jason Cooper <jason@lakedaemon.net>

Patch applied.

Yours,
Linus Walleij

Re: [PATCH v5 0/3] arm: mvebu: fix resource leak

[Linus Walleij]

On Tue, Aug 27, 2013 at 4:42 PM, Jason Cooper <jason@lakedaemon.net> wrote:
> On Tue, Aug 27, 2013 at 12:41:13PM +0800, Jisheng Zhang wrote:

>>   pinctrl: mvebu: Convert to use devm_ioremap_resource
>
> Previously Acked patch 3 for LinusW

I've taken that one into the pinctrl tree now.

Yours,
Linus Walleij

Re: [PATCH v5 3/3] pinctrl: mvebu: Convert to use devm_ioremap_resource

[Gregory CLEMENT]

On 07/11/2013 04:08, Jisheng Zhang wrote:
> The resource mapped by of_iomap() isn't unmapped in error path. This
> patch fix the resource leakage by using devm_ioremap_resource() instead
> of of_iomap().
> 
> Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
> Reviewed-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
> Acked-by: Jason Cooper <jason@lakedaemon.net>

Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com>


Thanks,

Gregory

> ---
>  drivers/pinctrl/mvebu/pinctrl-mvebu.c | 11 +++++------
>  1 file changed, 5 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/pinctrl/mvebu/pinctrl-mvebu.c b/drivers/pinctrl/mvebu/pinctrl-mvebu.c
> index bb7ddb1..1caa45f 100644
> --- a/drivers/pinctrl/mvebu/pinctrl-mvebu.c
> +++ b/drivers/pinctrl/mvebu/pinctrl-mvebu.c
> @@ -579,7 +579,7 @@ static int mvebu_pinctrl_build_functions(struct platform_device *pdev,
>  int mvebu_pinctrl_probe(struct platform_device *pdev)
>  {
>  	struct mvebu_pinctrl_soc_info *soc = dev_get_platdata(&pdev->dev);
> -	struct device_node *np = pdev->dev.of_node;
> +	struct resource *res;
>  	struct mvebu_pinctrl *pctl;
>  	void __iomem *base;
>  	struct pinctrl_pin_desc *pdesc;
> @@ -591,11 +591,10 @@ int mvebu_pinctrl_probe(struct platform_device *pdev)
>  		return -EINVAL;
>  	}
>  
> -	base = of_iomap(np, 0);
> -	if (!base) {
> -		dev_err(&pdev->dev, "unable to get base address\n");
> -		return -ENODEV;
> -	}
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	base = devm_ioremap_resource(&pdev->dev, res);
> +	if (IS_ERR(base))
> +		return PTR_ERR(base);
>  
>  	pctl = devm_kzalloc(&pdev->dev, sizeof(struct mvebu_pinctrl),
>  			GFP_KERNEL);
> 


-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

[PATCH v5 3/3] pinctrl: mvebu: Convert to use devm_ioremap_resource

[Jisheng Zhang]

The resource mapped by of_iomap() isn't unmapped in error path. This
patch fix the resource leakage by using devm_ioremap_resource() instead
of of_iomap().

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Reviewed-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
---
 drivers/pinctrl/mvebu/pinctrl-mvebu.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/pinctrl/mvebu/pinctrl-mvebu.c b/drivers/pinctrl/mvebu/pinctrl-mvebu.c
index bb7ddb1..1caa45f 100644
--- a/drivers/pinctrl/mvebu/pinctrl-mvebu.c
+++ b/drivers/pinctrl/mvebu/pinctrl-mvebu.c
@@ -579,7 +579,7 @@ static int mvebu_pinctrl_build_functions(struct platform_device *pdev,
 int mvebu_pinctrl_probe(struct platform_device *pdev)
 {
 	struct mvebu_pinctrl_soc_info *soc = dev_get_platdata(&pdev->dev);
-	struct device_node *np = pdev->dev.of_node;
+	struct resource *res;
 	struct mvebu_pinctrl *pctl;
 	void __iomem *base;
 	struct pinctrl_pin_desc *pdesc;
@@ -591,11 +591,10 @@ int mvebu_pinctrl_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	base = of_iomap(np, 0);
-	if (!base) {
-		dev_err(&pdev->dev, "unable to get base address\n");
-		return -ENODEV;
-	}
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
 
 	pctl = devm_kzalloc(&pdev->dev, sizeof(struct mvebu_pinctrl),
 			GFP_KERNEL);
-- 
1.8.4.rc3