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Subject: Re: [PATCH net] net: ethernet: lantiq_etop: Fix compilation error
To:     Aleksander Jan Bajkowski <olek2@wp.pl>, davem@davemloft.net,
        kuba@kernel.org, arnd@arndb.de, jgg@ziepe.ca,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Cc:     kernel test robot <lkp@intel.com>
References: <20211109222354.3688-1-olek2@wp.pl>
From:   Randy Dunlap <rdunlap@infradead.org>
Message-ID: <af4c86bc-add3-1f88-c854-aba81251cf85@infradead.org>
Date:   Tue, 9 Nov 2021 17:33:10 -0800
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On 11/9/21 2:23 PM, Aleksander Jan Bajkowski wrote:
> This fixes the error detected when compiling the driver.
> 
> Fixes: 14d4e308e0aa ("net: lantiq: configure the burst length in ethernet drivers")
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
> ---
>   drivers/net/ethernet/lantiq_etop.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/lantiq_etop.c b/drivers/net/ethernet/lantiq_etop.c
> index 2258e3f19161..6433c909c6b2 100644
> --- a/drivers/net/ethernet/lantiq_etop.c
> +++ b/drivers/net/ethernet/lantiq_etop.c
> @@ -262,7 +262,7 @@ ltq_etop_hw_init(struct net_device *dev)
>   	/* enable crc generation */
>   	ltq_etop_w32(PPE32_CGEN, LQ_PPE32_ENET_MAC_CFG);
>   
> -	ltq_dma_init_port(DMA_PORT_ETOP, priv->tx_burst_len, rx_burst_len);
> +	ltq_dma_init_port(DMA_PORT_ETOP, priv->tx_burst_len, priv->rx_burst_len);
>   
>   	for (i = 0; i < MAX_DMA_CHAN; i++) {
>   		int irq = LTQ_DMA_CH0_INT + i;
> 

Hi Aleksander,

That does indeed fix the first build problem that kernel test robot reported.

I was hoping that you would address the others also (quoting here):

    drivers/net/ethernet/lantiq_etop.c: In function 'ltq_etop_probe':
>> drivers/net/ethernet/lantiq_etop.c:673:15: error: implicit declaration of function 'device_property_read_u32' [-Werror=implicit-function-declaration]
      673 |         err = device_property_read_u32(&pdev->dev, "lantiq,tx-burst-length", &priv->tx_burst_len);
          |               ^~~~~~~~~~~~~~~~~~~~~~~~
    drivers/net/ethernet/lantiq_etop.c: At top level:
    drivers/net/ethernet/lantiq_etop.c:730:1: warning: no previous prototype for 'init_ltq_etop' [-Wmissing-prototypes]
      730 | init_ltq_etop(void)
          | ^~~~~~~~~~~~~
    drivers/net/ethernet/lantiq_etop.c: In function 'ltq_etop_hw_init':
    drivers/net/ethernet/lantiq_etop.c:276:25: warning: ignoring return value of 'request_irq' declared with attribute 'warn_unused_result' [-Wunused-result]
      276 |                         request_irq(irq, ltq_etop_dma_irq, 0, "etop_tx", priv);
          |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    drivers/net/ethernet/lantiq_etop.c:284:25: warning: ignoring return value of 'request_irq' declared with attribute 'warn_unused_result' [-Wunused-result]
      284 |                         request_irq(irq, ltq_etop_dma_irq, 0, "etop_rx", priv);
          |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    cc1: some warnings being treated as errors


If not, I can send the patch that I have prepared.

thanks.
-- 
~Randy