[PATCH] dio: add missing iounmap() after ioremap()

[PATCH] dio: add missing iounmap() after ioremap()

[yang.yang29]

From: xu xin <xu.xin16@zte.com.cn>

If kzalloc() fails, the 'va' needs to be unmapped before returning -ENOMEM.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: xu xin <xu.xin16@zte.com.cn>
---
 drivers/dio/dio.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/dio/dio.c b/drivers/dio/dio.c
index 4c06c93..7d19250 100644
--- a/drivers/dio/dio.c
+++ b/drivers/dio/dio.c
@@ -218,9 +218,11 @@ static int __init dio_init(void)

        /* Found a board, allocate it an entry in the list */
        dev = kzalloc(sizeof(struct dio_dev), GFP_KERNEL);
-       if (!dev)
+       if (!dev) {
+           if (scode >= DIOII_SCBASE)
+               iounmap(va);
            return -ENOMEM;
+       }
        dev->bus = &dio_bus;
        dev->dev.parent = &dio_bus.dev;
        dev->dev.bus = &dio_bus_type;
-- 
2.15.2

Re: [PATCH] dio: add missing iounmap() after ioremap()

[Greg KH]

On Mon, Aug 23, 2021 at 08:45:47PM +0800, yang.yang29@zte.com.cn wrote:
> From: xu xin <xu.xin16@zte.com.cn>
> 
> If kzalloc() fails, the 'va' needs to be unmapped before returning -ENOMEM.
> 
> Reported-by: Zeal Robot <zealci@zte.com.cn>
> Signed-off-by: xu xin <xu.xin16@zte.com.cn>
> ---
>  drivers/dio/dio.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/dio/dio.c b/drivers/dio/dio.c
> index 4c06c93..7d19250 100644
> --- a/drivers/dio/dio.c
> +++ b/drivers/dio/dio.c
> @@ -218,9 +218,11 @@ static int __init dio_init(void)
> 
>         /* Found a board, allocate it an entry in the list */
>         dev = kzalloc(sizeof(struct dio_dev), GFP_KERNEL);
> -       if (!dev)
> +       if (!dev) {
> +           if (scode >= DIOII_SCBASE)
> +               iounmap(va);
>             return -ENOMEM;
> +       }
>         dev->bus = &dio_bus;
>         dev->dev.parent = &dio_bus.dev;
>         dev->dev.bus = &dio_bus_type;
> -- 
> 2.15.2


Hi,

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