git bisect start
# bad: [e73f0f0ee7541171d89f2e2491130c7771ba58d3] Linux 5.14-rc1
git bisect bad e73f0f0ee7541171d89f2e2491130c7771ba58d3
# good: [62fb9874f5da54fdb243003b386128037319b219] Linux 5.13
git bisect good 62fb9874f5da54fdb243003b386128037319b219
# good: [e058a84bfddc42ba356a2316f2cf1141974625c9] Merge tag 'drm-next-2021-07-01' of git://anongit.freedesktop.org/drm/drm
git bisect good e058a84bfddc42ba356a2316f2cf1141974625c9
# bad: [eed0218e8cae9fcd186c30e9fcf5fe46a87e056e] Merge tag 'char-misc-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
git bisect bad eed0218e8cae9fcd186c30e9fcf5fe46a87e056e
# good: [bd31b9efbf549d9630bf2f269a3a56dcb29fcac1] Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
git bisect good bd31b9efbf549d9630bf2f269a3a56dcb29fcac1
# bad: [855ff900b8605df2b9ea309534cd2f02dc0c4cb8] Merge branch 'i2c/for-mergewindow' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
git bisect bad 855ff900b8605df2b9ea309534cd2f02dc0c4cb8
# good: [192664528154a84fab4e6d820f9cb2e2e0835544] Merge remote-tracking branch 'asoc/for-5.14' into asoc-next
git bisect good 192664528154a84fab4e6d820f9cb2e2e0835544
# good: [a3b7f9b8fa2967e1b3c2a402301715124c90306b] ALSA: hda/realtek: fix mute/micmute LEDs for HP ProBook 445 G8
git bisect good a3b7f9b8fa2967e1b3c2a402301715124c90306b
# good: [f92a322a63517a798f2da57d56b483a6ae8f45a1] Merge branch 'work.d_path' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
git bisect good f92a322a63517a798f2da57d56b483a6ae8f45a1
# good: [8e8d9442d1139d05d0c3b83efa34c4b7693d2969] Merge tag 'vfio-v5.14-rc1' of git://github.com/awilliam/linux-vfio
git bisect good 8e8d9442d1139d05d0c3b83efa34c4b7693d2969
# bad: [87cf5127968ab3c543ebd98253052b928f9b47da] i2c: core-smbus: Expose PEC calculate function for generic use
git bisect bad 87cf5127968ab3c543ebd98253052b928f9b47da
# bad: [02fa1189927f69f0f9d617789943fb4ae748012b] dt-bindings: i2c: Move i2c-omap.txt to YAML format
git bisect bad 02fa1189927f69f0f9d617789943fb4ae748012b
# good: [7475d2fbca9c0daf15fcd7d2fd440782af56dad7] i2c: rcar: Drop "renesas,i2c-rcar"
git bisect good 7475d2fbca9c0daf15fcd7d2fd440782af56dad7
# good: [cb3c66af9585c0301a772332e195ead1fe3b29cf] i2c: core: Make debug message even more debuggish
git bisect good cb3c66af9585c0301a772332e195ead1fe3b29cf
# bad: [5a7b95fb993ec399c8a685552aa6a8fc995c40bd] i2c: core: support bus regulator controlling in adapter
git bisect bad 5a7b95fb993ec399c8a685552aa6a8fc995c40bd
# first bad commit: [5a7b95fb993ec399c8a685552aa6a8fc995c40bd] i2c: core: support bus regulator controlling in adapter