Re: [PATCH V2 2/2] net: fec: add ndo_select_queue to fix TX bandwidth fluctuations

From: kernel test robot <lkp@intel.com>
To: Joakim Zhang <qiangqing.zhang@nxp.com>,
	davem@davemloft.net, kuba@kernel.org,
	frieder.schrempf@kontron.de, andrew@lunn.ch
Cc: kbuild-all@lists.01.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH V2 2/2] net: fec: add ndo_select_queue to fix TX bandwidth fluctuations
Date: Fri, 18 Jun 2021 23:11:25 +0800	[thread overview]
Message-ID: <202106182349.fU22m0sU-lkp@intel.com> (raw)
In-Reply-To: <20210611095005.3909-3-qiangqing.zhang@nxp.com>

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Hi Joakim,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on net-next/master]

url:    https://github.com/0day-ci/linux/commits/Joakim-Zhang/net-fec-fix-TX-bandwidth-fluctuations/20210616-221117
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git c7654495916e109f76a67fd3ae68f8fa70ab4faa
config: parisc-randconfig-s031-20210618 (attached as .config)
compiler: hppa-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://github.com/0day-ci/linux/commit/a0ef15273c2798319e07a8277161e99b4a22b41e
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Joakim-Zhang/net-fec-fix-TX-bandwidth-fluctuations/20210616-221117
        git checkout a0ef15273c2798319e07a8277161e99b4a22b41e
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=parisc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

sparse warnings: (new ones prefixed by >>)
>> drivers/net/ethernet/freescale/fec_main.c:3250:30: sparse: sparse: cast to restricted __be16
>> drivers/net/ethernet/freescale/fec_main.c:3250:16: sparse: sparse: restricted __be16 degrades to integer

vim +3250 drivers/net/ethernet/freescale/fec_main.c

  3244	
  3245	static u16 fec_enet_get_raw_vlan_tci(struct sk_buff *skb)
  3246	{
  3247		struct vlan_ethhdr *vhdr;
  3248		unsigned short vlan_TCI = 0;
  3249	
> 3250		if (skb->protocol == ntohs(ETH_P_ALL)) {
  3251			vhdr = (struct vlan_ethhdr *)(skb->data);
  3252			vlan_TCI = ntohs(vhdr->h_vlan_TCI);
  3253		}
  3254	
  3255		return vlan_TCI;
  3256	}
  3257	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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