linux-kernel - Re: [PATCH v3] fsl_ucc_hdlc: process the result of hold

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Message-ID: <50a3da63-37d3-1f44-657b-afeaf8c62741@csgroup.eu>
Date:   Mon, 28 Aug 2023 13:11:09 +0000
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Alexandra Diupina <adiupina@...ralinux.ru>,
        Zhao Qiang <qiang.zhao@....com>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "David S. Miller" <davem@...emloft.net>,
        "lvc-project@...uxtesting.org" <lvc-project@...uxtesting.org>
Subject: Re: [PATCH v3] fsl_ucc_hdlc: process the result of hold_open()



Le 28/08/2023 à 14:12, Alexandra Diupina a écrit :
> [Vous ne recevez pas souvent de courriers de adiupina@...ralinux.ru. Découvrez pourquoi ceci est important à https://aka.ms/LearnAboutSenderIdentification ]
> 
> Process the result of hold_open() and return it from
> uhdlc_open() in case of an error
> It is necessary to pass the error code up the control flow,
> similar to a possible error in request_irq()
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> 
> Fixes: c19b6d246a35 ("drivers/net: support hdlc function for QE-UCC")
> Signed-off-by: Alexandra Diupina <adiupina@...ralinux.ru>

Reviewed-by: Christophe Leroy <christophe.leroy@...roup.eu>

> ---
> v3: Fix the commits tree
> v2: Remove the 'rc' variable (stores the return value of the
> hdlc_open()) as Christophe Leroy <christophe.leroy@...roup.eu> suggested
>   drivers/net/wan/fsl_ucc_hdlc.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/wan/fsl_ucc_hdlc.c b/drivers/net/wan/fsl_ucc_hdlc.c
> index 47c2ad7a3e42..4164abea7725 100644
> --- a/drivers/net/wan/fsl_ucc_hdlc.c
> +++ b/drivers/net/wan/fsl_ucc_hdlc.c
> @@ -731,7 +731,7 @@ static int uhdlc_open(struct net_device *dev)
>                  napi_enable(&priv->napi);
>                  netdev_reset_queue(dev);
>                  netif_start_queue(dev);
> -               hdlc_open(dev);
> +               return hdlc_open(dev);
>          }
> 
>          return 0;
> --
> 2.30.2
>