linux-kernel - Re: [PATCH 3/3] scsi: don't add scsi command result bytes

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Message-ID: <201806122304.eQl0pfM8%fengguang.wu@intel.com>
Date:   Tue, 12 Jun 2018 23:46:18 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Johannes Thumshirn <jthumshirn@...e.de>
Cc:     kbuild-all@...org,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        Linux Kernel Mailinglist <linux-kernel@...r.kernel.org>,
        Linux SCSI Mailinglist <linux-scsi@...r.kernel.org>,
        Johannes Thumshirn <jthumshirn@...e.de>
Subject: Re: [PATCH 3/3] scsi: don't add scsi command result bytes

Hi Johannes,

I love your patch! Perhaps something to improve:

[auto build test WARNING on mkp-scsi/for-next]
[also build test WARNING on v4.17 next-20180612]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Johannes-Thumshirn/Preparation-patch-set-for-SCSI-results-rework/20180612-221711
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git for-next
config: x86_64-randconfig-x010-201823 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   In file included from drivers/scsi/sym53c8xx_2/sym_fw.c:40:0:
   drivers/scsi/sym53c8xx_2/sym_glue.h: In function 'sym_set_cam_result_ok':
>> drivers/scsi/sym53c8xx_2/sym_glue.h:259:47: warning: suggest parentheses around arithmetic in operand of '|' [-Wparentheses]
     cmd->result = DID_OK << 16 | cp->ssss_status & 0x7f;
                                  ~~~~~~~~~~~~~~~~^~~~~~

vim +259 drivers/scsi/sym53c8xx_2/sym_glue.h

   252	
   253	/*
   254	 *  Build CAM result for a successful IO and for a failed IO.
   255	 */
   256	static inline void sym_set_cam_result_ok(struct sym_ccb *cp, struct scsi_cmnd *cmd, int resid)
   257	{
   258		scsi_set_resid(cmd, resid);
 > 259		cmd->result = DID_OK << 16 | cp->ssss_status & 0x7f;
   260	}
   261	void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid);
   262	

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