Re: [PATCH v6 4/7] hisi_ptt: Add tune function support for HiSilicon PCIe Tune and Trace device

From: kernel test robot <lkp@intel.com>
To: Yicong Yang <yangyicong@hisilicon.com>,
	gregkh@linuxfoundation.org, helgaas@kernel.org,
	alexander.shishkin@linux.intel.com, lorenzo.pieralisi@arm.com,
	will@kernel.org, mark.rutland@arm.com,
	mathieu.poirier@linaro.org, suzuki.poulose@arm.com,
	mike.leach@linaro.org, leo.yan@linaro.org,
	jonathan.cameron@huawei.com, daniel.thompson@linaro.org,
	joro@8bytes.org, john.garry@huawei.com,
	shameerali.kolothum.thodi@huawei.com, robin.murphy@arm.com,
	peterz@infradead.org, mingo@redhat.com, acme@kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, coresight@lists.linaro.org,
	linux-pci@vger.kernel.org, linux-perf-users@vger.kernel.org,
	iommu@lists.linux-foundation.org
Cc: kbuild-all@lists.01.org, prime.zeng@huawei.com,
	liuqi115@huawei.com, zhangshaokun@hisilicon.com,
	linuxarm@huawei.com, yangyicong@hisilicon.com
Subject: Re: [PATCH v6 4/7] hisi_ptt: Add tune function support for HiSilicon PCIe Tune and Trace device
Date: Thu, 7 Apr 2022 12:28:05 +0800	[thread overview]
Message-ID: <202204071201.AcePULOR-lkp@intel.com> (raw)
In-Reply-To: <20220406071730.41031-5-yangyicong@hisilicon.com>

Hi Yicong,

I love your patch! Perhaps something to improve:

[auto build test WARNING on joro-iommu/next]
[also build test WARNING on linus/master linux/master v5.18-rc1 next-20220406]
[cannot apply to tip/perf/core]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/intel-lab-lkp/linux/commits/Yicong-Yang/Add-support-for-HiSilicon-PCIe-Tune-and-Trace-device/20220406-200044
base:   https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next
config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20220407/202204071201.AcePULOR-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/9400668b70cbcd5ec74a52f043c3a333b80135f8
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Yicong-Yang/Add-support-for-HiSilicon-PCIe-Tune-and-Trace-device/20220406-200044
        git checkout 9400668b70cbcd5ec74a52f043c3a333b80135f8
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=alpha SHELL=/bin/bash drivers/hwtracing/ptt/

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

All warnings (new ones prefixed by >>):

   drivers/hwtracing/ptt/hisi_ptt.c: In function 'hisi_ptt_tune_data_get':
>> drivers/hwtracing/ptt/hisi_ptt.c:46:16: warning: conversion from 'long unsigned int' to 'u32' {aka 'unsigned int'} changes value from '18446744073709551615' to '4294967295' [-Woverflow]
      46 |         writel(~0UL, hisi_ptt->iobase + HISI_PTT_TUNING_DATA);
         |                ^~~~
   drivers/hwtracing/ptt/hisi_ptt.c: At top level:
   drivers/hwtracing/ptt/hisi_ptt.c:1131:6: warning: no previous prototype for 'hisi_ptt_remove' [-Wmissing-prototypes]
    1131 | void hisi_ptt_remove(struct pci_dev *pdev)
         |      ^~~~~~~~~~~~~~~

vim +46 drivers/hwtracing/ptt/hisi_ptt.c

    33	
    34	static int hisi_ptt_tune_data_get(struct hisi_ptt *hisi_ptt,
    35					  u32 event, u16 *data)
    36	{
    37		u32 reg;
    38	
    39		reg = readl(hisi_ptt->iobase + HISI_PTT_TUNING_CTRL);
    40		reg &= ~(HISI_PTT_TUNING_CTRL_CODE | HISI_PTT_TUNING_CTRL_SUB);
    41		reg |= FIELD_PREP(HISI_PTT_TUNING_CTRL_CODE | HISI_PTT_TUNING_CTRL_SUB,
    42				  event);
    43		writel(reg, hisi_ptt->iobase + HISI_PTT_TUNING_CTRL);
    44	
    45		/* Write all 1 to indicates it's the read process */
  > 46		writel(~0UL, hisi_ptt->iobase + HISI_PTT_TUNING_DATA);
    47	
    48		if (!hisi_ptt_wait_tuning_finish(hisi_ptt))
    49			return -ETIMEDOUT;
    50	
    51		reg = readl(hisi_ptt->iobase + HISI_PTT_TUNING_DATA);
    52		reg &= HISI_PTT_TUNING_DATA_VAL_MASK;
    53		*data = FIELD_GET(HISI_PTT_TUNING_DATA_VAL_MASK, reg);
    54	
    55		return 0;
    56	}
    57	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

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