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SubjectRe: [PATCH 06/78] media: renesas-ceu: fix pm_runtime_get_sync() usage count (fwd)
Should there be an unlock before line 1104?

thanks,
julia

---------- Forwarded message ----------
Date: Sun, 25 Apr 2021 06:51:17 +0800
From: kernel test robot <lkp@intel.com>
To: kbuild@lists.01.org
Cc: lkp@intel.com, Julia Lawall <julia.lawall@lip6.fr>
Subject: Re: [PATCH 06/78] media: renesas-ceu: fix pm_runtime_get_sync() usage
count

CC: kbuild-all@lists.01.org
In-Reply-To: <29ba3fafde4d2643fae49789e6b378d6b1fd51f5.1619191723.git.mchehab+huawei@kernel.org>
References: <29ba3fafde4d2643fae49789e6b378d6b1fd51f5.1619191723.git.mchehab+huawei@kernel.org>
TO: Mauro Carvalho Chehab <mchehab@kernel.org>
CC: linux-media@vger.kernel.org
CC: linuxarm@huawei.com
CC: mauro.chehab@huawei.com
CC: Mauro Carvalho Chehab <mchehab@kernel.org>
CC: linux-media@vger.kernel.org
CC: Jacopo Mondi <jacopo@jmondi.org>
CC: linux-kernel@vger.kernel.org
CC: linux-renesas-soc@vger.kernel.org

Hi Mauro,

I love your patch! Perhaps something to improve:

[auto build test WARNING on linuxtv-media/master]
[also build test WARNING on rockchip/for-next tegra/for-next v5.12-rc8 next-20210423]
[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/Mauro-Carvalho-Chehab/media-use-pm_runtime_resume_and_get-instead-of-pm_runtime_get_sync/20210424-145029
base: git://linuxtv.org/media_tree.git master
:::::: branch date: 16 hours ago
:::::: commit date: 16 hours ago
config: riscv-allyesconfig (attached as .config)
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@intel.com>
Reported-by: Julia Lawall <julia.lawall@lip6.fr>


cocci warnings: (new ones prefixed by >>)
>> drivers/media/platform/renesas-ceu.c:1104:2-8: preceding lock on line 1100

vim +1104 drivers/media/platform/renesas-ceu.c

32e5a70dc8f4e9 Jacopo Mondi 2018-02-22 1090
32e5a70dc8f4e9 Jacopo Mondi 2018-02-22 1091 static int ceu_open(struct file *file)
32e5a70dc8f4e9 Jacopo Mondi 2018-02-22 1092 {
32e5a70dc8f4e9 Jacopo Mondi 2018-02-22 1093 struct ceu_device *ceudev = video_drvdata(file);
32e5a70dc8f4e9 Jacopo Mondi 2018-02-22 1094 int ret;
32e5a70dc8f4e9 Jacopo Mondi 2018-02-22 1095
32e5a70dc8f4e9 Jacopo Mondi 2018-02-22 1096 ret = v4l2_fh_open(file);
32e5a70dc8f4e9 Jacopo Mondi 2018-02-22 1097 if (ret)
32e5a70dc8f4e9 Jacopo Mondi 2018-02-22 1098 return ret;
32e5a70dc8f4e9 Jacopo Mondi 2018-02-22 1099
32e5a70dc8f4e9 Jacopo Mondi 2018-02-22 @1100 mutex_lock(&ceudev->mlock);
32e5a70dc8f4e9 Jacopo Mondi 2018-02-22 1101 /* Causes soft-reset and sensor power on on first open */
4825ba42eb8d20 Mauro Carvalho Chehab 2021-04-24 1102 ret = pm_runtime_resume_and_get(ceudev->dev);
4825ba42eb8d20 Mauro Carvalho Chehab 2021-04-24 1103 if (ret < 0)
4825ba42eb8d20 Mauro Carvalho Chehab 2021-04-24 @1104 return ret;
4825ba42eb8d20 Mauro Carvalho Chehab 2021-04-24 1105
32e5a70dc8f4e9 Jacopo Mondi 2018-02-22 1106 mutex_unlock(&ceudev->mlock);
32e5a70dc8f4e9 Jacopo Mondi 2018-02-22 1107
32e5a70dc8f4e9 Jacopo Mondi 2018-02-22 1108 return 0;
32e5a70dc8f4e9 Jacopo Mondi 2018-02-22 1109 }
32e5a70dc8f4e9 Jacopo Mondi 2018-02-22 1110

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org[unhandled content-type:application/gzip]
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