Hi Ming, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on axboe-block/for-next] [also build test WARNING on v5.17-rc6 next-20220302] [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/Ming-Lei/blk-mq-update_nr_hw_queues-related-improvement-bugfix/20220302-201636 base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next compiler: m68k-linux-gcc (GCC) 11.2.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <yujie.liu@xxxxxxxxx> cppcheck possible warnings: (new ones prefixed by >>, may not be real problems) >> block/blk-mq-sysfs.c:282:13: warning: Unsigned variable '--' can't be negative so it is unnecessary to test it. [unsignedPositive] while (--i >= 0) ^ vim +282 block/blk-mq-sysfs.c 67aec14ce87fe25 Jens Axboe 2014-05-30 254 2d0364c8c1a97a1 Bart Van Assche 2017-04-26 255 int __blk_mq_register_dev(struct device *dev, struct request_queue *q) 320ae51feed5c2f Jens Axboe 2013-10-24 256 { 320ae51feed5c2f Jens Axboe 2013-10-24 257 struct blk_mq_hw_ctx *hctx; 44849be579332ce Ming Lei 2022-03-02 @258 unsigned long i; 44849be579332ce Ming Lei 2022-03-02 259 int ret; 320ae51feed5c2f Jens Axboe 2013-10-24 260 2d0364c8c1a97a1 Bart Van Assche 2017-04-26 261 WARN_ON_ONCE(!q->kobj.parent); cecf5d87ff20351 Ming Lei 2019-08-27 262 lockdep_assert_held(&q->sysfs_dir_lock); 4593fdbe7a2f44d Akinobu Mita 2015-09-27 263 1db4909e76f64a8 Ming Lei 2018-11-20 264 ret = kobject_add(q->mq_kobj, kobject_get(&dev->kobj), "%s", "mq"); 320ae51feed5c2f Jens Axboe 2013-10-24 265 if (ret < 0) 4593fdbe7a2f44d Akinobu Mita 2015-09-27 266 goto out; 320ae51feed5c2f Jens Axboe 2013-10-24 267 1db4909e76f64a8 Ming Lei 2018-11-20 268 kobject_uevent(q->mq_kobj, KOBJ_ADD); 320ae51feed5c2f Jens Axboe 2013-10-24 269 320ae51feed5c2f Jens Axboe 2013-10-24 270 queue_for_each_hw_ctx(q, hctx, i) { 67aec14ce87fe25 Jens Axboe 2014-05-30 271 ret = blk_mq_register_hctx(hctx); 320ae51feed5c2f Jens Axboe 2013-10-24 272 if (ret) f05d1ba7871a2c2 Bart Van Assche 2017-04-26 273 goto unreg; 320ae51feed5c2f Jens Axboe 2013-10-24 274 } 320ae51feed5c2f Jens Axboe 2013-10-24 275 4593fdbe7a2f44d Akinobu Mita 2015-09-27 276 q->mq_sysfs_init_done = true; 2d0364c8c1a97a1 Bart Van Assche 2017-04-26 277 4593fdbe7a2f44d Akinobu Mita 2015-09-27 278 out: 2d0364c8c1a97a1 Bart Van Assche 2017-04-26 279 return ret; f05d1ba7871a2c2 Bart Van Assche 2017-04-26 280 f05d1ba7871a2c2 Bart Van Assche 2017-04-26 281 unreg: f05d1ba7871a2c2 Bart Van Assche 2017-04-26 @282 while (--i >= 0) f05d1ba7871a2c2 Bart Van Assche 2017-04-26 283 blk_mq_unregister_hctx(q->queue_hw_ctx[i]); f05d1ba7871a2c2 Bart Van Assche 2017-04-26 284 1db4909e76f64a8 Ming Lei 2018-11-20 285 kobject_uevent(q->mq_kobj, KOBJ_REMOVE); 1db4909e76f64a8 Ming Lei 2018-11-20 286 kobject_del(q->mq_kobj); f05d1ba7871a2c2 Bart Van Assche 2017-04-26 287 kobject_put(&dev->kobj); f05d1ba7871a2c2 Bart Van Assche 2017-04-26 288 return ret; 2d0364c8c1a97a1 Bart Van Assche 2017-04-26 289 } 2d0364c8c1a97a1 Bart Van Assche 2017-04-26 290 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
