From: kernel test robot <lkp@intel.com>
To: Rob Clark <robdclark@gmail.com>, dri-devel@lists.freedesktop.org
Cc: Rob Clark <robdclark@chromium.org>,
Len Brown <len.brown@intel.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
linux-arm-msm@vger.kernel.org,
"open list:POWER MANAGEMENT CORE" <linux-pm@vger.kernel.org>,
llvm@lists.linux.dev, open list <linux-kernel@vger.kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Pavel Machek <pavel@ucw.cz>,
oe-kbuild-all@lists.linux.dev, freedreno@lists.freedesktop.org
Subject: Re: [PATCH v2 18/23] PM / QoS: Decouple request alloc from dev_pm_qos_mtx
Date: Tue, 21 Mar 2023 04:34:57 +0800 [thread overview]
Message-ID: <202303210420.9g2z6MgO-lkp@intel.com> (raw)
In-Reply-To: <20230320144356.803762-19-robdclark@gmail.com>
Hi Rob,
I love your patch! Perhaps something to improve:
[auto build test WARNING on drm-misc/drm-misc-next]
[also build test WARNING on rafael-pm/linux-next drm-intel/for-linux-next drm-intel/for-linux-next-fixes drm-tip/drm-tip linus/master v6.3-rc3 next-20230320]
[cannot apply to chanwoo/devfreq-testing]
[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#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Rob-Clark/drm-msm-Pre-allocate-hw_fence/20230320-224826
base: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
patch link: https://lore.kernel.org/r/20230320144356.803762-19-robdclark%40gmail.com
patch subject: [PATCH v2 18/23] PM / QoS: Decouple request alloc from dev_pm_qos_mtx
config: x86_64-randconfig-a014 (https://download.01.org/0day-ci/archive/20230321/202303210420.9g2z6MgO-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
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/2d7e4629d7265d7e77fc72d01e84d27d805b7485
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Rob-Clark/drm-msm-Pre-allocate-hw_fence/20230320-224826
git checkout 2d7e4629d7265d7e77fc72d01e84d27d805b7485
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/base/power/ drivers/char/tpm/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303210420.9g2z6MgO-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/base/power/qos.c:947:8: warning: variable 'req' is uninitialized when used here [-Wuninitialized]
if (!req) {
^~~
drivers/base/power/qos.c:938:33: note: initialize the variable 'req' to silence this warning
struct dev_pm_qos_request *req;
^
= NULL
1 warning generated.
vim +/req +947 drivers/base/power/qos.c
2d984ad132a87c Rafael J. Wysocki 2014-02-11 917
2d984ad132a87c Rafael J. Wysocki 2014-02-11 918 /**
2d984ad132a87c Rafael J. Wysocki 2014-02-11 919 * dev_pm_qos_update_user_latency_tolerance - Update user space latency tolerance.
2d984ad132a87c Rafael J. Wysocki 2014-02-11 920 * @dev: Device to update the user space latency tolerance for.
2d984ad132a87c Rafael J. Wysocki 2014-02-11 921 * @val: New user space latency tolerance for @dev (negative values disable).
2d984ad132a87c Rafael J. Wysocki 2014-02-11 922 */
2d984ad132a87c Rafael J. Wysocki 2014-02-11 923 int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val)
2d984ad132a87c Rafael J. Wysocki 2014-02-11 924 {
2d7e4629d7265d Rob Clark 2023-03-20 925 struct dev_pm_qos_request *req = NULL;
2d984ad132a87c Rafael J. Wysocki 2014-02-11 926 int ret;
2d984ad132a87c Rafael J. Wysocki 2014-02-11 927
00dd582e52a535 Rob Clark 2023-03-20 928 ret = dev_pm_qos_constraints_ensure_allocated(dev);
00dd582e52a535 Rob Clark 2023-03-20 929 if (ret)
00dd582e52a535 Rob Clark 2023-03-20 930 return ret;
00dd582e52a535 Rob Clark 2023-03-20 931
2d7e4629d7265d Rob Clark 2023-03-20 932 if (!dev->power.qos->latency_tolerance_req)
2d7e4629d7265d Rob Clark 2023-03-20 933 req = kzalloc(sizeof(*req), GFP_KERNEL);
2d7e4629d7265d Rob Clark 2023-03-20 934
2d984ad132a87c Rafael J. Wysocki 2014-02-11 935 mutex_lock(&dev_pm_qos_mtx);
2d984ad132a87c Rafael J. Wysocki 2014-02-11 936
00dd582e52a535 Rob Clark 2023-03-20 937 if (!dev->power.qos->latency_tolerance_req) {
2d984ad132a87c Rafael J. Wysocki 2014-02-11 938 struct dev_pm_qos_request *req;
2d984ad132a87c Rafael J. Wysocki 2014-02-11 939
2d984ad132a87c Rafael J. Wysocki 2014-02-11 940 if (val < 0) {
80a6f7c79b7822 Andrew Lutomirski 2016-11-29 941 if (val == PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT)
80a6f7c79b7822 Andrew Lutomirski 2016-11-29 942 ret = 0;
80a6f7c79b7822 Andrew Lutomirski 2016-11-29 943 else
2d984ad132a87c Rafael J. Wysocki 2014-02-11 944 ret = -EINVAL;
2d984ad132a87c Rafael J. Wysocki 2014-02-11 945 goto out;
2d984ad132a87c Rafael J. Wysocki 2014-02-11 946 }
2d984ad132a87c Rafael J. Wysocki 2014-02-11 @947 if (!req) {
2d984ad132a87c Rafael J. Wysocki 2014-02-11 948 ret = -ENOMEM;
2d984ad132a87c Rafael J. Wysocki 2014-02-11 949 goto out;
2d984ad132a87c Rafael J. Wysocki 2014-02-11 950 }
2d984ad132a87c Rafael J. Wysocki 2014-02-11 951 ret = __dev_pm_qos_add_request(dev, req, DEV_PM_QOS_LATENCY_TOLERANCE, val);
2d984ad132a87c Rafael J. Wysocki 2014-02-11 952 if (ret < 0) {
2d984ad132a87c Rafael J. Wysocki 2014-02-11 953 kfree(req);
2d984ad132a87c Rafael J. Wysocki 2014-02-11 954 goto out;
2d984ad132a87c Rafael J. Wysocki 2014-02-11 955 }
2d984ad132a87c Rafael J. Wysocki 2014-02-11 956 dev->power.qos->latency_tolerance_req = req;
2d984ad132a87c Rafael J. Wysocki 2014-02-11 957 } else {
2d7e4629d7265d Rob Clark 2023-03-20 958 /*
2d7e4629d7265d Rob Clark 2023-03-20 959 * If we raced with another thread to allocate the request,
2d7e4629d7265d Rob Clark 2023-03-20 960 * simply free the redundant allocation and move on.
2d7e4629d7265d Rob Clark 2023-03-20 961 */
2d7e4629d7265d Rob Clark 2023-03-20 962 if (req)
2d7e4629d7265d Rob Clark 2023-03-20 963 kfree(req);
2d7e4629d7265d Rob Clark 2023-03-20 964
2d984ad132a87c Rafael J. Wysocki 2014-02-11 965 if (val < 0) {
2d984ad132a87c Rafael J. Wysocki 2014-02-11 966 __dev_pm_qos_drop_user_request(dev, DEV_PM_QOS_LATENCY_TOLERANCE);
2d984ad132a87c Rafael J. Wysocki 2014-02-11 967 ret = 0;
2d984ad132a87c Rafael J. Wysocki 2014-02-11 968 } else {
2d984ad132a87c Rafael J. Wysocki 2014-02-11 969 ret = __dev_pm_qos_update_request(dev->power.qos->latency_tolerance_req, val);
2d984ad132a87c Rafael J. Wysocki 2014-02-11 970 }
2d984ad132a87c Rafael J. Wysocki 2014-02-11 971 }
2d984ad132a87c Rafael J. Wysocki 2014-02-11 972
2d984ad132a87c Rafael J. Wysocki 2014-02-11 973 out:
2d984ad132a87c Rafael J. Wysocki 2014-02-11 974 mutex_unlock(&dev_pm_qos_mtx);
2d984ad132a87c Rafael J. Wysocki 2014-02-11 975 return ret;
2d984ad132a87c Rafael J. Wysocki 2014-02-11 976 }
034e7906211c18 Andrew Lutomirski 2016-11-29 977 EXPORT_SYMBOL_GPL(dev_pm_qos_update_user_latency_tolerance);
13b2c4a0c3b1cd Mika Westerberg 2015-07-27 978
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
next prev parent reply other threads:[~2023-03-20 20:36 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-20 14:43 [PATCH v2 00/23] drm/msm+PM+icc: Make job_run() reclaim-safe Rob Clark
2023-03-20 14:43 ` [PATCH v2 01/23] drm/msm: Pre-allocate hw_fence Rob Clark
2023-03-20 16:52 ` Christian König
2023-03-20 20:32 ` Rob Clark
2023-03-20 14:43 ` [PATCH v2 02/23] drm/msm: Move submit bo flags update from obj lock Rob Clark
2023-03-20 14:43 ` [PATCH v2 03/23] drm/msm/gem: Tidy up VMA API Rob Clark
2023-03-20 14:43 ` [PATCH v2 04/23] drm/msm: Decouple vma tracking from obj lock Rob Clark
2023-03-20 14:43 ` [PATCH v2 05/23] drm/msm/gem: Simplify vmap vs LRU tracking Rob Clark
2023-03-20 14:43 ` [PATCH v2 06/23] drm/gem: Export drm_gem_lru_move_tail_locked() Rob Clark
2023-03-20 14:43 ` [PATCH v2 07/23] drm/msm/gem: Move update_lru() Rob Clark
2023-03-20 14:43 ` [PATCH v2 08/23] drm/msm/gem: Protect pin_count/madv by LRU lock Rob Clark
2023-03-20 14:43 ` [PATCH v2 09/23] drm/msm/gem: Avoid obj lock in job_run() Rob Clark
2023-03-20 14:43 ` [PATCH v2 10/23] drm/msm: Switch idr_lock to spinlock Rob Clark
2023-03-20 14:43 ` [PATCH v2 11/23] drm/msm: Use idr_preload() Rob Clark
2023-03-20 14:43 ` [PATCH v2 12/23] drm/msm/gpu: Move fw loading out of hw_init() path Rob Clark
2023-03-20 14:43 ` [PATCH v2 13/23] drm/msm/gpu: Move BO allocation out of hw_init Rob Clark
2023-03-20 14:43 ` [PATCH v2 14/23] drm/msm/a6xx: Move ioremap out of hw_init path Rob Clark
2023-03-20 14:43 ` [PATCH v2 15/23] PM / devfreq: Drop unneed locking to appease lockdep Rob Clark
2023-03-20 14:43 ` [PATCH v2 16/23] PM / devfreq: Teach lockdep about locking order Rob Clark
2023-03-20 14:43 ` [PATCH v2 17/23] PM / QoS: Fix constraints alloc vs reclaim locking Rob Clark
2023-03-27 17:53 ` Rafael J. Wysocki
2023-03-27 19:52 ` Rob Clark
2023-03-20 14:43 ` [PATCH v2 18/23] PM / QoS: Decouple request alloc from dev_pm_qos_mtx Rob Clark
2023-03-20 20:13 ` kernel test robot
2023-03-20 20:34 ` kernel test robot [this message]
2023-03-21 4:53 ` Dan Carpenter
2023-03-20 14:43 ` [PATCH v2 19/23] PM / QoS: Teach lockdep about dev_pm_qos_mtx locking order Rob Clark
2023-03-20 14:43 ` [PATCH v2 20/23] soc: qcom: smd-rpm: Use GFP_ATOMIC in write path Rob Clark
2023-03-20 14:43 ` [PATCH v2 21/23] interconnect: Fix locking for runpm vs reclaim Rob Clark
2023-03-20 14:43 ` [PATCH v2 22/23] interconnect: Teach lockdep about icc_bw_lock order Rob Clark
2023-03-20 14:43 ` [PATCH v2 23/23] drm/sched: Add (optional) fence signaling annotation Rob Clark
2023-03-21 2:55 ` Luben Tuikov
2023-04-07 17:41 ` (subset) [PATCH v2 00/23] drm/msm+PM+icc: Make job_run() reclaim-safe Bjorn Andersson
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