linux-kernel - Re: [PATCH 3/3] can: xilinx: fix xcan_start

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Message-ID: <02e9be66-1345-2af7-c343-9f94d71e1d10@pengutronix.de>
Date:   Fri, 27 Apr 2018 09:55:16 +0200
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     Michal Simek <michal.simek@...inx.com>,
        Luc Van Oostenryck <luc.vanoostenryck@...il.com>
Cc:     Wolfgang Grandegger <wg@...ndegger.com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>,
        "open list:CAN NETWORK DRIVERS" <linux-can@...r.kernel.org>,
        "open list:NETWORKING DRIVERS" <netdev@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "moderated list:ARM/Allwinner sunXi SoC support" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 3/3] can: xilinx: fix xcan_start_xmit()'s return type

On 04/27/2018 09:49 AM, Michal Simek wrote:
> On 26.4.2018 23:13, Luc Van Oostenryck wrote:
>> The method ndo_start_xmit() is defined as returning an 'netdev_tx_t',
>> which is a typedef for an enum type, but the implementation in this
>> driver returns an 'int'.
>>
>> Fix this by returning 'netdev_tx_t' in this driver too.
>>
>> Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@...il.com>
>> ---
>>  drivers/net/can/xilinx_can.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/net/can/xilinx_can.c b/drivers/net/can/xilinx_can.c
>> index 89aec07c2..a19648606 100644
>> --- a/drivers/net/can/xilinx_can.c
>> +++ b/drivers/net/can/xilinx_can.c
>> @@ -386,7 +386,7 @@ static int xcan_do_set_mode(struct net_device *ndev, enum can_mode mode)
>>   *
>>   * Return: 0 on success and failure value on error
>>   */
>> -static int xcan_start_xmit(struct sk_buff *skb, struct net_device *ndev)
>> +static netdev_tx_t xcan_start_xmit(struct sk_buff *skb, struct net_device *ndev)
>>  {
>>  	struct xcan_priv *priv = netdev_priv(ndev);
>>  	struct net_device_stats *stats = &ndev->stats;
>>
> 
> It was applied already but there should be also kernel-doc update too to
> use enum values instead of 0.

Like this:

> diff --git a/drivers/net/can/xilinx_can.c b/drivers/net/can/xilinx_can.c
> index f07ce4945356..d0ad1473f689 100644
> --- a/drivers/net/can/xilinx_can.c
> +++ b/drivers/net/can/xilinx_can.c
> @@ -398,7 +398,7 @@ static int xcan_do_set_mode(struct net_device *ndev, enum can_mode mode)
>   * function uses the next available free txbuff and populates their fields to
>   * start the transmission.
>   *
> - * Return: 0 on success and failure value on error
> + * Return: NETDEV_TX_OK on success and NETDEV_TX_BUSY when the tx queue is full
>   */
>  static netdev_tx_t xcan_start_xmit(struct sk_buff *skb, struct net_device *ndev)
>  {

I can squash in that change.

Marc

-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
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