Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Subject: Re: [PATCH] net/alacritech: Make use of the helper function
 dev_err_probe()
To:     Cai Huoqing <caihuoqing@baidu.com>
Cc:     "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <20210915145734.7145-1-caihuoqing@baidu.com>
From:   Lino Sanfilippo <LinoSanfilippo@gmx.de>
Message-ID: <707ca3c3-f42a-d7f7-b52c-829d8e243c87@gmx.de>
Date:   Wed, 15 Sep 2021 23:20:40 +0200
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101
 Thunderbird/68.10.0
MIME-Version: 1.0
In-Reply-To: <20210915145734.7145-1-caihuoqing@baidu.com>
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: quoted-printable
Precedence: bulk


Hi,

On 15.09.21 at 16:57, Cai Huoqing wrote:
> When possible use dev_err_probe help to properly deal with the
> PROBE_DEFER error, the benefit is that DEFER issue will be logged
> in the devices_deferred debugfs file.
> And using dev_err_probe() can reduce code size, and simplify the code.
>
> Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
> ---
>  drivers/net/ethernet/alacritech/slicoss.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/net/ethernet/alacritech/slicoss.c b/drivers/net/eth=
ernet/alacritech/slicoss.c
> index 696517eae77f..170ff8c77983 100644
> --- a/drivers/net/ethernet/alacritech/slicoss.c
> +++ b/drivers/net/ethernet/alacritech/slicoss.c
> @@ -1743,10 +1743,8 @@ static int slic_probe(struct pci_dev *pdev, const=
 struct pci_device_id *ent)
>  	int err;
>
>  	err =3D pci_enable_device(pdev);
> -	if (err) {
> -		dev_err(&pdev->dev, "failed to enable PCI device\n");
> -		return err;
> -	}
> +	if (err)
> +		return dev_err_probe(&pdev->dev, err, "failed to enable PCI device\n"=
);
>
>  	pci_set_master(pdev);
>  	pci_try_set_mwi(pdev);
>

in which case does pci_enable_device() ever return -EPROBE_DEFER?

Regards,
Lino