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charset=us-ascii Content-Disposition: inline tree: https://android.googlesource.com/kernel/common android15-6.6 head: 9f62a273a8443aa2d97898c5c473974ec3ea77d1 commit: 2d0738a8322bf4e5bfe693d16b3111928a9ccfbf [0/4] md: fix deadlock between mddev_suspend and flush bio config: i386-randconfig-054-20250527 (https://download.01.org/0day-ci/archive/20250527/202505271000.MjXIdIck-lkp@intel.com/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 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 | Closes: https://lore.kernel.org/oe-kbuild-all/202505271000.MjXIdIck-lkp@intel.com/ cocci warnings: (new ones prefixed by >>) >> drivers/md/md.c:564:21-22: Unneeded semicolon vim +564 drivers/md/md.c 532 533 static void md_submit_flush_data(struct work_struct *ws) 534 { 535 struct mddev *mddev = container_of(ws, struct mddev, flush_work); 536 struct bio *bio = mddev->flush_bio; 537 538 /* 539 * must reset flush_bio before calling into md_handle_request to avoid a 540 * deadlock, because other bios passed md_handle_request suspend check 541 * could wait for this and below md_handle_request could wait for those 542 * bios because of suspend check 543 */ 544 spin_lock_irq(&mddev->lock); 545 mddev->prev_flush_start = mddev->start_flush; 546 mddev->flush_bio = NULL; 547 spin_unlock_irq(&mddev->lock); 548 wake_up(&mddev->sb_wait); 549 550 if (bio->bi_iter.bi_size == 0) { 551 /* an empty barrier - all done */ 552 bio_endio(bio); 553 } else { 554 bio->bi_opf &= ~REQ_PREFLUSH; 555 556 /* 557 * make_requst() will never return error here, it only 558 * returns error in raid5_make_request() by dm-raid. 559 * Since dm always splits data and flush operation into 560 * two separate io, io size of flush submitted by dm 561 * always is 0, make_request() will not be called here. 562 */ 563 if (WARN_ON_ONCE(!mddev->pers->make_request(mddev, bio))) > 564 bio_io_error(bio);; 565 } 566 567 /* The pair is percpu_ref_get() from md_flush_request() */ 568 percpu_ref_put(&mddev->active_io); 569 } 570 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki