Comment 4 for bug 1867983

I had time to bisect kernel:

# bad: [af7acadc09d232b50ef83011d9c6368c925ef32f] UBUNTU: Ubuntu-5.3.0-40.32
# good: [1ecdc2a4b15cf2032094966a30bc79992968beb2] UBUNTU: Ubuntu-5.3.0-29.31
git bisect start 'Ubuntu-5.3.0-40.32' 'Ubuntu-5.3.0-29.31'
# good: [ec8e731b6b8941cd561eb4cd5f987dbf0268edcb] md/raid0: avoid RAID0 data corruption due to layout confusion.
git bisect good ec8e731b6b8941cd561eb4cd5f987dbf0268edcb
# bad: [fb787b4169ee66faf0a78488476e0398f5e283a1] spi: gpio: prevent memory leak in spi_gpio_probe
git bisect bad fb787b4169ee66faf0a78488476e0398f5e283a1
# good: [b9a9d432b09d1100c8fe3982b4a53b9307f03466] x86/mce: Lower throttling MCE messages' priority to warning
git bisect good b9a9d432b09d1100c8fe3982b4a53b9307f03466
# bad: [b268b5877901fa69f4a34e94643108c0bb9112e0] tun: fix data-race in gro_normal_list()
git bisect bad b268b5877901fa69f4a34e94643108c0bb9112e0
# bad: [67e07f18209160bbabaf112cfefa4454d299949b] perf jevents: Fix resource leak in process_mapfile() and main()
git bisect bad 67e07f18209160bbabaf112cfefa4454d299949b
# good: [b5c04c65cafa25745356b85ace1c3b80b8ac5d58] s390/mm: add mm_pxd_folded() checks to pxd_free()
git bisect good b5c04c65cafa25745356b85ace1c3b80b8ac5d58
# bad: [99226e3d1768352047769426058c6fb922d05c89] media: rcar_drif: fix a memory disclosure
git bisect bad 99226e3d1768352047769426058c6fb922d05c89
# bad: [03edfe2eecb66a0b664f344df9478b0179733ba5] iio: dln2-adc: fix iio_triggered_buffer_postenable() position
git bisect bad 03edfe2eecb66a0b664f344df9478b0179733ba5
# bad: [2535c05ffda6d344eb4917178a8ecdf7835e87c2] libata: Ensure ata_port probe has completed before detach
git bisect bad 2535c05ffda6d344eb4917178a8ecdf7835e87c2
# good: [be64fadc7c51317046112a4b4c9895575343ced3] net: hns3: add struct netdev_queue debug info for TX timeout
git bisect good be64fadc7c51317046112a4b4c9895575343ced3
# first bad commit: [2535c05ffda6d344eb4917178a8ecdf7835e87c2] libata: Ensure ata_port probe has completed before detach

It seems that the first bad commit just force ata synchronization. I have no idea how I can test this more for now, but I am available for testing.