• Jason Nader's avatar
    ata: ahci: Do not apply Intel PCS quirk on Intel Alder Lake · 9e2f46cd
    Jason Nader authored
    Commit b8b8b4e0 ("ata: ahci: Add Intel Alder Lake-P AHCI controller
    to low power chipsets list") added Intel Alder Lake to the ahci_pci_tbl.
    
    Because of the way that the Intel PCS quirk was implemented, having
    an explicit entry in the ahci_pci_tbl caused the Intel PCS quirk to
    be applied. (The quirk was not being applied if there was no explict
    entry.)
    
    Thus, entries that were added to the ahci_pci_tbl also got the Intel
    PCS quirk applied.
    
    The quirk was cleaned up in commit 7edbb605 ("ahci: clean up
    intel_pcs_quirk"), such that it is clear which entries that actually
    applies the Intel PCS quirk.
    
    Newer Intel AHCI controllers do not need the Intel PCS quirk,
    and applying it when not needed actually breaks some platforms.
    
    Do not apply the Intel PCS quirk for Intel Alder Lake.
    This is in line with how things worked before commit b8b8b4e0 ("ata:
    ahci: Add Intel Alder Lake-P AHCI controller to low power chipsets list"),
    such that certain platforms using Intel Alder Lake will work once again.
    
    Cc: stable@vger.kernel.org # 6.7
    Fixes: b8b8b4e0 ("ata: ahci: Add Intel Alder Lake-P AHCI controller to low power chipsets list")
    Signed-off-by: default avatarJason Nader <dev@kayoway.com>
    Signed-off-by: default avatarNiklas Cassel <cassel@kernel.org>
    9e2f46cd
ahci.c 67.5 KB