git bisect start '--' 'drivers/ata'
# bad: [1506707a6c740db316e422239a53ae5df1727591] Linux 2.6.35.4
git bisect bad 1506707a6c740db316e422239a53ae5df1727591
# good: [e40152ee1e1c7a63f4777791863215e3faa37a86] Linus 2.6.34
git bisect good e40152ee1e1c7a63f4777791863215e3faa37a86
# bad: [c7087652e1890a3feef35b30ee1d4be68e1932cd] libata-sff: clean up BMDMA initialization
git bisect bad c7087652e1890a3feef35b30ee1d4be68e1932cd
# good: [fe6005b81e142c36f066b81ca85f80022c4ac979] pata_scc: make scc_wait_after_reset() static
git bisect good fe6005b81e142c36f066b81ca85f80022c4ac979
# bad: [978c066691a49a205673672a55685305663a2554] libata: Remove excess delay in the tf_load path
git bisect bad 978c066691a49a205673672a55685305663a2554
# good: [41dec29bcb05eb8ec396f70ce791c6e3e4ce4712] libata: introduce sff_set_devctl() method
git bisect good 41dec29bcb05eb8ec396f70ce791c6e3e4ce4712
# good: [276a47a93dbfe5d35261451925020f65cdbfcce8] pata_cmd640: don't read CFR pointlessly
git bisect good 276a47a93dbfe5d35261451925020f65cdbfcce8
# good: [95cc2c70c139936a2142bcd583da8af6f9d88efb] sata_nv: use ata_pci_sff_activate_host() instead of ata_host_activate()
git bisect good 95cc2c70c139936a2142bcd583da8af6f9d88efb