linux-kernel - Re: [PATCH] net: sfc: checks status of efx_mcdi

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Message-Id: <20181227.162550.173701726860933882.davem@davemloft.net>
Date:   Thu, 27 Dec 2018 16:25:50 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     kjlu@....edu
Cc:     pakki001@....edu, linux-net-drivers@...arflare.com,
        ecree@...arflare.com, bkenward@...arflare.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: sfc: checks status of efx_mcdi_rpc

From: Kangjie Lu <kjlu@....edu>
Date: Tue, 25 Dec 2018 23:05:17 -0600

> efx_mcdi_rpc() could fail. The fix checks its status and issues an error
> message if it fails.
> 
> Signed-off-by: Kangjie Lu <kjlu@....edu>
> ---
>  drivers/net/ethernet/sfc/mcdi.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/net/ethernet/sfc/mcdi.c b/drivers/net/ethernet/sfc/mcdi.c
> index dfad93fca0a6..9486e6534dea 100644
> --- a/drivers/net/ethernet/sfc/mcdi.c
> +++ b/drivers/net/ethernet/sfc/mcdi.c
> @@ -1819,6 +1819,9 @@ void efx_mcdi_set_id_led(struct efx_nic *efx, enum efx_led_mode mode)
>  
>  	rc = efx_mcdi_rpc(efx, MC_CMD_SET_ID_LED, inbuf, sizeof(inbuf),
>  			  NULL, 0, NULL);
> +	if (rc)
> +		netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n",
> +				__func__, rc);

"__func__" did not fail, efx_mcdi_rpc() did.