linux-kernel - Re: [PATCH] vdpa: ifcvf: Do proper cleanup if IFCVF init fails

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Date:   Fri, 27 Jan 2023 05:37:55 -0500
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Tanmay Bhushan <007047221b@...il.com>
Cc:     Zhu Lingshan <lingshan.zhu@...el.com>,
        Jason Wang <jasowang@...hat.com>,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] vdpa: ifcvf: Do proper cleanup if IFCVF init fails

On Tue, Dec 27, 2022 at 10:15:25PM +0100, Tanmay Bhushan wrote:
> >From 7eae04667ddaac8baa4812d48ef2c942cedef946 Mon Sep 17 00:00:00 2001
> From: Tanmay Bhushan <007047221b@...il.com>
> Date: Tue, 27 Dec 2022 22:02:16 +0100
> Subject: [PATCH] vdpa: ifcvf: Do proper cleanup if IFCVF init fails
> 
> ifcvf_mgmt_dev leaks memory if it is not freed before
> returning. Call is made to correct return statement
> so memory does not leak. ifcvf_init_hw does not take
> care of this so it is needed to do it here.
> 
> Signed-off-by: Tanmay Bhushan <007047221b@...il.com>
> ---
>  drivers/vdpa/ifcvf/ifcvf_main.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c
> b/drivers/vdpa/ifcvf/ifcvf_main.c
> index f9c0044c6442..44b29289aa19 100644
> --- a/drivers/vdpa/ifcvf/ifcvf_main.c
> +++ b/drivers/vdpa/ifcvf/ifcvf_main.c
> @@ -849,7 +849,7 @@ static int ifcvf_probe(struct pci_dev *pdev, const
> struct pci_device_id *id)

BTW your patch was mangled but I fixed it.

>  	ret = ifcvf_init_hw(vf, pdev);
>  	if (ret) {
>  		IFCVF_ERR(pdev, "Failed to init IFCVF hw\n");
> -		return ret;
> +		goto err;
>  	}
>  
>  	for (i = 0; i < vf->nr_vring; i++)
> -- 
> 2.34.1
>