linux-kernel - drivers/net/ethernet/sfc/ef100_rx.c:44:9-10: WARNING: return of 0/1 in function 'check

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Date:   Sat, 22 Aug 2020 09:23:01 +0800
From:   kernel test robot <lkp@...el.com>
To:     Edward Cree <ecree@...arflare.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: drivers/net/ethernet/sfc/ef100_rx.c:44:9-10: WARNING: return of 0/1
 in function 'check_fcs' with return type bool

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f873db9acd3c92d4741bc3676c9eb511b2f9a6f6
commit: 8e57daf70671e482209b5d231a181f04845cf73e sfc_ef100: RX path for EF100
date:   3 weeks ago
config: i386-randconfig-c003-20200821 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0

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


coccinelle warnings: (new ones prefixed by >>)

>> drivers/net/ethernet/sfc/ef100_rx.c:44:9-10: WARNING: return of 0/1 in function 'check_fcs' with return type bool

# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8e57daf70671e482209b5d231a181f04845cf73e
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 8e57daf70671e482209b5d231a181f04845cf73e
vim +/check_fcs +44 drivers/net/ethernet/sfc/ef100_rx.c

    20	
    21	/* Get the value of a field in the RX prefix */
    22	#define PREFIX_OFFSET_W(_f)	(ESF_GZ_RX_PREFIX_ ## _f ## _LBN / 32)
    23	#define PREFIX_OFFSET_B(_f)	(ESF_GZ_RX_PREFIX_ ## _f ## _LBN % 32)
    24	#define PREFIX_WIDTH_MASK(_f)	((1UL << ESF_GZ_RX_PREFIX_ ## _f ## _WIDTH) - 1)
    25	#define PREFIX_WORD(_p, _f)	le32_to_cpu((__force __le32)(_p)[PREFIX_OFFSET_W(_f)])
    26	#define PREFIX_FIELD(_p, _f)	((PREFIX_WORD(_p, _f) >> PREFIX_OFFSET_B(_f)) & \
    27					 PREFIX_WIDTH_MASK(_f))
    28	
    29	#define ESF_GZ_RX_PREFIX_NT_OR_INNER_L3_CLASS_LBN	\
    30			(ESF_GZ_RX_PREFIX_CLASS_LBN + ESF_GZ_RX_PREFIX_HCLASS_NT_OR_INNER_L3_CLASS_LBN)
    31	#define ESF_GZ_RX_PREFIX_NT_OR_INNER_L3_CLASS_WIDTH	\
    32			ESF_GZ_RX_PREFIX_HCLASS_NT_OR_INNER_L3_CLASS_WIDTH
    33	
    34	static bool check_fcs(struct efx_channel *channel, u32 *prefix)
    35	{
    36		u16 rxclass;
    37		u8 l2status;
    38	
    39		rxclass = le16_to_cpu((__force __le16)PREFIX_FIELD(prefix, CLASS));
    40		l2status = PREFIX_FIELD(&rxclass, HCLASS_L2_STATUS);
    41	
    42		if (likely(l2status == ESE_GZ_RH_HCLASS_L2_STATUS_OK))
    43			/* Everything is ok */
  > 44			return 0;
    45	
    46		if (l2status == ESE_GZ_RH_HCLASS_L2_STATUS_FCS_ERR)
    47			channel->n_rx_eth_crc_err++;
    48		return 1;
    49	}
    50	

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

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