linux-kernel - Re: [PATCH] ntb_transport: use put

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Message-ID: <81eaa48f-2d47-6e4e-9445-356930d974a3@deltatee.com>
Date:   Fri, 9 Mar 2018 09:46:54 -0700
From:   Logan Gunthorpe <logang@...tatee.com>
To:     Arvind Yadav <arvind.yadav.cs@...il.com>, jdmason@...zu.us,
        dave.jiang@...el.com, allenbh@...il.com
Cc:     linux-kernel@...r.kernel.org, linux-ntb@...glegroups.com
Subject: Re: [PATCH] ntb_transport: use put_device() instead of kfree()

Looks correct to me. Thanks!

Reviewed-by: Logan Gunthorpe <logang@...tatee.com>

On 09/03/18 03:33 AM, Arvind Yadav wrote:
> Never directly free @dev after calling device_register(), even
> if it returned an error! Always use put_device() to give up the
> reference initialized.
> 
> Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>
> ---
>   drivers/ntb/ntb_transport.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
> index 9878c48..8182a3a 100644
> --- a/drivers/ntb/ntb_transport.c
> +++ b/drivers/ntb/ntb_transport.c
> @@ -393,7 +393,7 @@ int ntb_transport_register_client_dev(char *device_name)
>   
>   		rc = device_register(dev);
>   		if (rc) {
> -			kfree(client_dev);
> +			put_device(dev);
>   			goto err;
>   		}
>   
>