linux-kernel - Re: [PATCH 2/2] phy: qualcomm: eusb2-repeater: Drop the redundant zeroing

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Message-ID: <202401070143.pnnuXAwC-lkp@intel.com>
Date: Sun, 7 Jan 2024 01:30:46 +0800
From: kernel test robot <lkp@...el.com>
To: Abel Vesa <abel.vesa@...aro.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>
Cc: oe-kbuild-all@...ts.linux.dev, linux-arm-msm@...r.kernel.org,
	linux-phy@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Abel Vesa <abel.vesa@...aro.org>
Subject: Re: [PATCH 2/2] phy: qualcomm: eusb2-repeater: Drop the redundant
 zeroing

Hi Abel,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 0fef202ac2f8e6d9ad21aead648278f1226b9053]

url:    https://github.com/intel-lab-lkp/linux/commits/Abel-Vesa/phy-qualcomm-eusb2-repeater-Fix-the-regfields-for-multiple-instances/20240104-225513
base:   0fef202ac2f8e6d9ad21aead648278f1226b9053
patch link:    https://lore.kernel.org/r/20240104-phy-qcom-eusb2-repeater-fixes-v1-2-047b7b6b8333%40linaro.org
patch subject: [PATCH 2/2] phy: qualcomm: eusb2-repeater: Drop the redundant zeroing
config: i386-buildonly-randconfig-004-20240106 (https://download.01.org/0day-ci/archive/20240107/202401070143.pnnuXAwC-lkp@intel.com/config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240107/202401070143.pnnuXAwC-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202401070143.pnnuXAwC-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c: In function 'eusb2_repeater_init':
>> drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c:145:20: warning: unused variable 'regfields' [-Wunused-variable]
     struct reg_field *regfields = rptr->regfields;
                       ^~~~~~~~~


vim +/regfields +145 drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c

56d77c9a10d97d Abel Vesa     2023-02-08  141  
56d77c9a10d97d Abel Vesa     2023-02-08  142  static int eusb2_repeater_init(struct phy *phy)
56d77c9a10d97d Abel Vesa     2023-02-08  143  {
56d77c9a10d97d Abel Vesa     2023-02-08  144  	struct eusb2_repeater *rptr = phy_get_drvdata(phy);
ac0aae0074102c Abel Vesa     2024-01-04 @145  	struct reg_field *regfields = rptr->regfields;
56156a76e765d3 Konrad Dybcio 2023-09-13  146  	struct device_node *np = rptr->dev->of_node;
56156a76e765d3 Konrad Dybcio 2023-09-13  147  	u32 init_tbl[F_NUM_TUNE_FIELDS] = { 0 };
56156a76e765d3 Konrad Dybcio 2023-09-13  148  	u8 override;
56d77c9a10d97d Abel Vesa     2023-02-08  149  	u32 val;
56d77c9a10d97d Abel Vesa     2023-02-08  150  	int ret;
56d77c9a10d97d Abel Vesa     2023-02-08  151  	int i;
56d77c9a10d97d Abel Vesa     2023-02-08  152  
56d77c9a10d97d Abel Vesa     2023-02-08  153  	ret = regulator_bulk_enable(rptr->cfg->num_vregs, rptr->vregs);
56d77c9a10d97d Abel Vesa     2023-02-08  154  	if (ret)
56d77c9a10d97d Abel Vesa     2023-02-08  155  		return ret;
56d77c9a10d97d Abel Vesa     2023-02-08  156  
4ba2e52718c0ce Konrad Dybcio 2023-09-13  157  	regmap_field_update_bits(rptr->regs[F_EN_CTL1], EUSB2_RPTR_EN, EUSB2_RPTR_EN);
56d77c9a10d97d Abel Vesa     2023-02-08  158  
56156a76e765d3 Konrad Dybcio 2023-09-13  159  	memcpy(init_tbl, rptr->cfg->init_tbl, sizeof(init_tbl));
56156a76e765d3 Konrad Dybcio 2023-09-13  160  
56156a76e765d3 Konrad Dybcio 2023-09-13  161  	if (!of_property_read_u8(np, "qcom,tune-usb2-amplitude", &override))
56156a76e765d3 Konrad Dybcio 2023-09-13  162  		init_tbl[F_TUNE_IUSB2] = override;
56156a76e765d3 Konrad Dybcio 2023-09-13  163  
56156a76e765d3 Konrad Dybcio 2023-09-13  164  	if (!of_property_read_u8(np, "qcom,tune-usb2-disc-thres", &override))
56156a76e765d3 Konrad Dybcio 2023-09-13  165  		init_tbl[F_TUNE_HSDISC] = override;
56156a76e765d3 Konrad Dybcio 2023-09-13  166  
56156a76e765d3 Konrad Dybcio 2023-09-13  167  	if (!of_property_read_u8(np, "qcom,tune-usb2-preem", &override))
56156a76e765d3 Konrad Dybcio 2023-09-13  168  		init_tbl[F_TUNE_USB2_PREEM] = override;
56156a76e765d3 Konrad Dybcio 2023-09-13  169  
56156a76e765d3 Konrad Dybcio 2023-09-13  170  	for (i = 0; i < F_NUM_TUNE_FIELDS; i++)
56156a76e765d3 Konrad Dybcio 2023-09-13  171  		regmap_field_update_bits(rptr->regs[i], init_tbl[i], init_tbl[i]);
56d77c9a10d97d Abel Vesa     2023-02-08  172  
4ba2e52718c0ce Konrad Dybcio 2023-09-13  173  	ret = regmap_field_read_poll_timeout(rptr->regs[F_RPTR_STATUS],
4ba2e52718c0ce Konrad Dybcio 2023-09-13  174  					     val, val & RPTR_OK, 10, 5);
56d77c9a10d97d Abel Vesa     2023-02-08  175  	if (ret)
56d77c9a10d97d Abel Vesa     2023-02-08  176  		dev_err(rptr->dev, "initialization timed-out\n");
56d77c9a10d97d Abel Vesa     2023-02-08  177  
56d77c9a10d97d Abel Vesa     2023-02-08  178  	return ret;
56d77c9a10d97d Abel Vesa     2023-02-08  179  }
56d77c9a10d97d Abel Vesa     2023-02-08  180  

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https://github.com/intel/lkp-tests/wiki