[PATCH] dio: add missing iounmap() in dio_init()

[PATCH] dio: add missing iounmap() in dio_init()

[Yang Yingliang]

Add iounmap() in error path of kzalloc().

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
 drivers/dio/dio.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/dio/dio.c b/drivers/dio/dio.c
index 005a82f671c3..0e5a5662d5a4 100644
--- a/drivers/dio/dio.c
+++ b/drivers/dio/dio.c
@@ -216,8 +216,11 @@ 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;
-- 
2.25.1

Re: [PATCH] dio: add missing iounmap() in dio_init()

[Greg KH]

On Mon, May 09, 2022 at 07:18:40PM +0800, Yang Yingliang wrote:
> Add iounmap() in error path of kzalloc().
> 
> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
> ---
>  drivers/dio/dio.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/dio/dio.c b/drivers/dio/dio.c
> index 005a82f671c3..0e5a5662d5a4 100644
> --- a/drivers/dio/dio.c
> +++ b/drivers/dio/dio.c
> @@ -216,8 +216,11 @@ 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;
> -- 
> 2.25.1
> 

Hi,

This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
a patch that has triggered this response.  He used to manually respond
to these common problems, but in order to save his sanity (he kept
writing the same thing over and over, yet to different people), I was
created.  Hopefully you will not take offence and will fix the problem
in your patch and resubmit it so that it can be accepted into the Linux
kernel tree.

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thanks,

greg k-h's patch email bot