[PATCH] PCI: v3-semi: Fix a memory leak in some error handling paths in 'v3_pci_probe()'

[PATCH] PCI: v3-semi: Fix a memory leak in some error handling paths in 'v3_pci_probe()'

[Christophe JAILLET]

IF we fails somewhere in 'v3_pci_probe()', we need to free 'host'.
Use the managed version of 'pci_alloc_host_bridge()' to do that easily.
The use of managed resources is already widely used in this driver.

Fixes: 68a15eb7bd0c ("PCI: v3-semi: Add V3 Semiconductor PCI host driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
Fixes could be older than this commit, but this is as far as git can go.

There is also a 'clk_prepare_enable()' which looks un-ballanced. I don't
know if it can be an issue.

Compile tested only.
---
 drivers/pci/controller/pci-v3-semi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/controller/pci-v3-semi.c b/drivers/pci/controller/pci-v3-semi.c
index bd05221f5a22..ddcb4571a79b 100644
--- a/drivers/pci/controller/pci-v3-semi.c
+++ b/drivers/pci/controller/pci-v3-semi.c
@@ -720,7 +720,7 @@ static int v3_pci_probe(struct platform_device *pdev)
 	int irq;
 	int ret;
 
-	host = pci_alloc_host_bridge(sizeof(*v3));
+	host = devm_pci_alloc_host_bridge(dev, sizeof(*v3));
 	if (!host)
 		return -ENOMEM;
 
-- 
2.20.1

Re: [PATCH] PCI: v3-semi: Fix a memory leak in some error handling paths in 'v3_pci_probe()'

[Linus Walleij]

On Sat, Apr 18, 2020 at 10:16 AM Christophe JAILLET
<christophe.jaillet@wanadoo.fr> wrote:

> IF we fails somewhere in 'v3_pci_probe()', we need to free 'host'.
> Use the managed version of 'pci_alloc_host_bridge()' to do that easily.
> The use of managed resources is already widely used in this driver.
>
> Fixes: 68a15eb7bd0c ("PCI: v3-semi: Add V3 Semiconductor PCI host driver")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

Acked-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij

Re: [PATCH] PCI: v3-semi: Fix a memory leak in some error handling paths in 'v3_pci_probe()'

[Lorenzo Pieralisi]

On Sat, Apr 18, 2020 at 10:16:37AM +0200, Christophe JAILLET wrote:
> IF we fails somewhere in 'v3_pci_probe()', we need to free 'host'.
> Use the managed version of 'pci_alloc_host_bridge()' to do that easily.
> The use of managed resources is already widely used in this driver.
> 
> Fixes: 68a15eb7bd0c ("PCI: v3-semi: Add V3 Semiconductor PCI host driver")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
> Fixes could be older than this commit, but this is as far as git can go.
> 
> There is also a 'clk_prepare_enable()' which looks un-ballanced. I don't
> know if it can be an issue.
> 
> Compile tested only.
> ---
>  drivers/pci/controller/pci-v3-semi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Applied to pci/v3-semi, thanks !

Lorenzo

> diff --git a/drivers/pci/controller/pci-v3-semi.c b/drivers/pci/controller/pci-v3-semi.c
> index bd05221f5a22..ddcb4571a79b 100644
> --- a/drivers/pci/controller/pci-v3-semi.c
> +++ b/drivers/pci/controller/pci-v3-semi.c
> @@ -720,7 +720,7 @@ static int v3_pci_probe(struct platform_device *pdev)
>  	int irq;
>  	int ret;
>  
> -	host = pci_alloc_host_bridge(sizeof(*v3));
> +	host = devm_pci_alloc_host_bridge(dev, sizeof(*v3));
>  	if (!host)
>  		return -ENOMEM;
>  
> -- 
> 2.20.1
>