linux-kernel - Re: [PATCH v2 6/7] soc: mediatek: mmsys: Add reset controller support

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Message-ID: <baf4a35e-8025-460c-85b6-214ad23d7b89@intel.com>
Date:   Fri, 16 Jul 2021 17:01:36 +0800
From:   kernel test robot <rong.a.chen@...el.com>
To:     Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     chunkuang.hu@...nel.org, hsinyi@...omium.org, kernel@...labora.com,
        drinkcat@...omium.org, eizan@...omium.org,
        linux-mediatek@...ts.infradead.org, matthias.bgg@...il.com,
        jitao.shi@...iatek.com, Philipp Zabel <p.zabel@...gutronix.de>,
        kbuild-all@...ts.01.org
Subject: Re: [PATCH v2 6/7] soc: mediatek: mmsys: Add reset controller support


Hi Enric,

I love your patch! Perhaps something to improve:

[auto build test WARNING on robh/for-next]
[also build test WARNING on pza/reset/next linux/master linus/master 
v5.14-rc1 next-20210714]
[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/0day-ci/linux/commits/Enric-Balletbo-i-Serra/Add-support-to-the-mmsys-driver-to-be-a-reset-controller/20210714-181318
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git 
for-next
compiler: riscv64-linux-gcc (GCC) 9.3.0

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


cppcheck possible warnings: (new ones prefixed by >>, may not real problems)

>> drivers/soc/mediatek/mtk-mmsys.c:104:6: warning: Unused variable: i [unusedVariable]
     int i;
         ^

vim +104 drivers/soc/mediatek/mtk-mmsys.c

2c758e301ed95a Enric Balletbo i Serra 2020-03-25   97  08a3068f9490f0 
Enric Balletbo i Serra 2021-07-14   98  static int 
mtk_mmsys_reset_update(struct reset_controller_dev *rcdev, unsigned long id,
08a3068f9490f0 Enric Balletbo i Serra 2021-07-14   99  				  bool assert)
08a3068f9490f0 Enric Balletbo i Serra 2021-07-14  100  {
08a3068f9490f0 Enric Balletbo i Serra 2021-07-14  101  	struct mtk_mmsys 
*mmsys = container_of(rcdev, struct mtk_mmsys, rcdev);
08a3068f9490f0 Enric Balletbo i Serra 2021-07-14  102  	unsigned long flags;
08a3068f9490f0 Enric Balletbo i Serra 2021-07-14  103  	u32 reg;
08a3068f9490f0 Enric Balletbo i Serra 2021-07-14 @104  	int i;
08a3068f9490f0 Enric Balletbo i Serra 2021-07-14  105  08a3068f9490f0 
Enric Balletbo i Serra 2021-07-14  106  	spin_lock_irqsave(&mmsys->lock, 
flags);
08a3068f9490f0 Enric Balletbo i Serra 2021-07-14  107  08a3068f9490f0 
Enric Balletbo i Serra 2021-07-14  108  	reg = readl_relaxed(mmsys->regs 
+ MMSYS_SW0_RST_B);
08a3068f9490f0 Enric Balletbo i Serra 2021-07-14  109  08a3068f9490f0 
Enric Balletbo i Serra 2021-07-14  110  	if (assert)
08a3068f9490f0 Enric Balletbo i Serra 2021-07-14  111  		reg &= ~BIT(id);
08a3068f9490f0 Enric Balletbo i Serra 2021-07-14  112  	else
08a3068f9490f0 Enric Balletbo i Serra 2021-07-14  113  		reg |= BIT(id);
08a3068f9490f0 Enric Balletbo i Serra 2021-07-14  114  08a3068f9490f0 
Enric Balletbo i Serra 2021-07-14  115  	writel_relaxed(reg, mmsys->regs 
+ MMSYS_SW0_RST_B);
08a3068f9490f0 Enric Balletbo i Serra 2021-07-14  116  08a3068f9490f0 
Enric Balletbo i Serra 2021-07-14  117 
spin_unlock_irqrestore(&mmsys->lock, flags);
08a3068f9490f0 Enric Balletbo i Serra 2021-07-14  118  08a3068f9490f0 
Enric Balletbo i Serra 2021-07-14  119  	return 0;
08a3068f9490f0 Enric Balletbo i Serra 2021-07-14  120  }
08a3068f9490f0 Enric Balletbo i Serra 2021-07-14  121
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org