linux-kernel - Re: [PATCH] sfc: Fix missing error code in efx_reset

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Date:   Fri, 14 Jan 2022 09:41:47 +0000
From:   Martin Habets <martin.habets@...inx.com>
To:     Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
CC:     <ecree.xilinx@...il.com>, <habetsm.xilinx@...il.com>,
        <davem@...emloft.net>, <kuba@...nel.org>, <ast@...nel.org>,
        <daniel@...earbox.net>, <hawk@...nel.org>,
        <john.fastabend@...il.com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <bpf@...r.kernel.org>,
        Abaci Robot <abaci@...ux.alibaba.com>
Subject: Re: [PATCH] sfc: Fix missing error code in efx_reset_up()

On Fri, Jan 14, 2022 at 12:13:15AM +0800, Jiapeng Chong wrote:
> The error code is missing in this code scenario, add the error code
> '-EINVAL' to the return value 'rc'.
> 
> Eliminate the follow smatch warning:
> 
> drivers/net/ethernet/sfc/efx_common.c:758 efx_reset_up() warn: missing
> error code 'rc'.

The warning is not correct. We want to return an rc of 0 in this case, and
that is what rc is already set to given the earlier code.

Martin

> 
> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
> Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
> ---
>  drivers/net/ethernet/sfc/efx_common.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/sfc/efx_common.c b/drivers/net/ethernet/sfc/efx_common.c
> index af37c990217e..bdfcda8bb5d0 100644
> --- a/drivers/net/ethernet/sfc/efx_common.c
> +++ b/drivers/net/ethernet/sfc/efx_common.c
> @@ -754,8 +754,10 @@ int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok)
>  		goto fail;
>  	}
>  
> -	if (!ok)
> +	if (!ok) {
> +		rc = -EINVAL;
>  		goto fail;
> +	}
>  
>  	if (efx->port_initialized && method != RESET_TYPE_INVISIBLE &&
>  	    method != RESET_TYPE_DATAPATH) {
> -- 
> 2.20.1.7.g153144c