linux-kernel - Re: [PATCH 3/4] vDPA/ifcvf: Fix return value check for vdpa_alloc

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Message-ID: <3f3f9594-6a79-1ddb-4c45-fd1304c7d398@redhat.com>
Date:   Thu, 15 Jul 2021 16:09:26 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Xie Yongji <xieyongji@...edance.com>, mst@...hat.com,
        dan.carpenter@...cle.com
Cc:     virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] vDPA/ifcvf: Fix return value check for
 vdpa_alloc_device()


在 2021/7/15 下午4:00, Xie Yongji 写道:
> The vdpa_alloc_device() returns an error pointer upon
> failure, not NULL. To handle the failure correctly, this
> replaces NULL check with IS_ERR() check and propagate the
> error upwards.
>
> Fixes: 5a2414bc454e ("virtio: Intel IFC VF driver for VDPA")
> Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
> Signed-off-by: Xie Yongji <xieyongji@...edance.com>


Acked-by: Jason Wang <jasowang@...hat.com>


> ---
>   drivers/vdpa/ifcvf/ifcvf_main.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
> index 21b78f1cd521..351c6cfb24c3 100644
> --- a/drivers/vdpa/ifcvf/ifcvf_main.c
> +++ b/drivers/vdpa/ifcvf/ifcvf_main.c
> @@ -493,9 +493,9 @@ static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
>   
>   	adapter = vdpa_alloc_device(struct ifcvf_adapter, vdpa,
>   				    dev, &ifc_vdpa_ops, NULL);
> -	if (adapter == NULL) {
> +	if (IS_ERR(adapter)) {
>   		IFCVF_ERR(pdev, "Failed to allocate vDPA structure");
> -		return -ENOMEM;
> +		return PTR_ERR(adapter);
>   	}
>   
>   	pci_set_master(pdev);