linux-kernel - Re: [PATCH 2/2] clocksource: Ingenic: Add support for the Ingenic X1000 OST.

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Date:   Thu, 25 Jun 2020 16:47:32 +0800
From:   kernel test robot <lkp@...el.com>
To:     周琰杰 (Zhou Yanjie) 
        <zhouyanjie@...yeetech.com>, linux-kernel@...r.kernel.org
Cc:     kbuild-all@...ts.01.org, devicetree@...r.kernel.org,
        daniel.lezcano@...aro.org, tglx@...utronix.de, robh+dt@...nel.org,
        paul@...pouillou.net, dongsheng.qiu@...enic.com,
        aric.pzqi@...enic.com, rick.tyliu@...enic.com,
        yanfei.li@...enic.com
Subject: Re: [PATCH 2/2] clocksource: Ingenic: Add support for the Ingenic
 X1000 OST.

Hi "周琰杰,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on tip/timers/core]
[cannot apply to daniel.lezcano/clockevents/next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use  as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Zhou-Yanjie/Add-support-for-the-OST-in-Ingenic-X1000/20200625-005621
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 809eb4e9bf9d84eb5b703358afd0d564d514f6d2
config: x86_64-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-13) 9.3.0

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

All warnings (new ones prefixed by >>):

   drivers/clocksource/ingenic-sysost.c: In function 'ingenic_ost_cevt_set_next':
>> drivers/clocksource/ingenic-sysost.c:221:9: warning: conversion from 'long unsigned int' to 'unsigned int' changes value from '18446744073709551614' to '4294967294' [-Woverflow]
     221 |  writel(~OSTFR_FFLAG, ost->base + OST_REG_OSTFR);
   drivers/clocksource/ingenic-sysost.c:225:9: warning: conversion from 'long unsigned int' to 'unsigned int' changes value from '18446744073709551614' to '4294967294' [-Woverflow]
     225 |  writel(~OSTMR_FMASK, ost->base + OST_REG_OSTMR);
   drivers/clocksource/ingenic-sysost.c: In function 'ingenic_ost_init':
   drivers/clocksource/ingenic-sysost.c:477:5: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized]
     477 |  if (ret)
         |     ^

vim +221 drivers/clocksource/ingenic-sysost.c

   215	
   216	static int ingenic_ost_cevt_set_next(unsigned long next,
   217					     struct clock_event_device *evt)
   218	{
   219		struct ingenic_ost *ost = to_ingenic_ost(evt);
   220	
 > 221		writel(~OSTFR_FFLAG, ost->base + OST_REG_OSTFR);
   222		writel(next, ost->base + OST_REG_OST1DFR);
   223		writel(OSTCR_OST1CLR, ost->base + OST_REG_OSTCR);
   224		writel(OSTESR_OST1ENS, ost->base + OST_REG_OSTESR);
   225		writel(~OSTMR_FMASK, ost->base + OST_REG_OSTMR);
   226	
   227		return 0;
   228	}
   229	

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

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