linux-kernel - Re: [PATCH 2/3] ntb: IDT 89HPES*NT* PCIe-switches NTB device driver

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Date:	Thu, 28 Jul 2016 00:29:44 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Serge Semin <fancer.lancer@...il.com>
Cc:	kbuild-all@...org, jdmason@...zu.us, dave.jiang@...el.com,
	Allen.Hubbe@....com, Xiangliang.Yu@....com,
	Sergey.Semin@...latforms.ru, linux-ntb@...glegroups.com,
	linux-kernel@...r.kernel.org, Serge Semin <fancer.lancer@...il.com>
Subject: Re: [PATCH 2/3] ntb: IDT 89HPES*NT* PCIe-switches NTB device driver

Hi,

[auto build test WARNING on ntb/ntb-next]
[cannot apply to v4.7 next-20160727]
[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/Serge-Semin/ntb-Asynchronous-NTB-devices-support/20160727-082033
base:   https://github.com/jonmason/ntb ntb-next
config: sparc64-allmodconfig (attached as .config)
compiler: sparc64-linux-gnu-gcc (Debian 5.4.0-6) 5.4.0 20160609
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=sparc64 

All warnings (new ones prefixed by >>):

   drivers/ntb/hw/idt/ntb_hw_idt.c: In function 'idt_ntb_setmw':
>> drivers/ntb/hw/idt/ntb_hw_idt.c:1170:56: warning: right shift count >= width of type [-Wshift-count-overflow]
     idt_ntb_writereg(cfg, IDT_NT_PCI_LUTMDATA, (u32)(addr >> 32));
                                                           ^

vim +1170 drivers/ntb/hw/idt/ntb_hw_idt.c

  1154	
  1155		/* Collect the Lookup table offset */
  1156		idt_ntb_writefld_var(&lut_indxbar, IDT_NT_LUT_INDEX,
  1157				     ndev->mw_self_offset + mwindx);
  1158		idt_ntb_writefld_var(&lut_indxbar, IDT_NT_LUT_BAR, BAR2);
  1159	
  1160		/* Collect the Lookup table entry partition and valid bits */
  1161		idt_ntb_writefld_var(&lut_partval, IDT_NT_LUT_PART, ndev->part);
  1162		idt_ntb_writefld_var(&lut_partval, IDT_NT_LUT_VALID, ON);
  1163	
  1164		/* Start critical section writing to the local port Lookup table */
  1165		spin_lock_irqsave(&pdata->lut_lock, irqflags);
  1166		/* Write the data to the Lookup table registers of the peer */
  1167		idt_ntb_writereg(cfg, IDT_NT_PCI_LUTOFFSET, lut_indxbar);
  1168		idt_ntb_writereg(cfg, IDT_NT_PCI_LUTLDATA, (u32)addr);
  1169	#ifdef CONFIG_64BIT
> 1170		idt_ntb_writereg(cfg, IDT_NT_PCI_LUTMDATA, (u32)(addr >> 32));
  1171	#else
  1172		idt_ntb_writereg(cfg, IDT_NT_PCI_LUTMDATA, (u32)0);
  1173	#endif /* !CONFIG_64BIT */
  1174		idt_ntb_writereg(cfg, IDT_NT_PCI_LUTUDATA, lut_partval);
  1175		/* Finally unlock the Lookup table */
  1176		spin_unlock_irqrestore(&pdata->lut_lock, irqflags);
  1177	
  1178		return SUCCESS;

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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