On 04.10.19 14:48:13, Bjorn Helgaas wrote: > commit 37b22fbfec2d > Author: George Cherian <george.cherian@xxxxxxxxxxx> > Date: Thu Sep 19 02:43:34 2019 +0000 > > PCI: Apply Cavium ACS quirk to CN99xx and CN11xxx Root Ports > > Add an array of Cavium Root Port device IDs and apply the quirk only to the > listed devices. > > Instead of applying the quirk to all Root Ports where > "(dev->device & 0xf800) == 0xa000", apply it only to CN88xx 0xa180 and > 0xa170 Root Ports. No, this can't be removed. It is a match all for all CN8xxx variants (note the 3 'x', all TX1 cores). So all device ids from 0xa000 to 0xa7FF are affected here and need the quirk. > > Also apply the quirk to CN99xx (0xaf84) and CN11xxx (0xb884) Root Ports. I thought the quirk is CN8xxx specific, but I could be wrong here. -Robert > > Link: https://urldefense.proofpoint.com/v2/url?u=https-3A__lore.kernel.org_r_20190919024319.GA8792-40dc5-2Deodlnx05.marvell.com&d=DwIBAg&c=nKjWec2b6R0mOyPaz7xtfQ&r=8vKOpC26NZGzQPAMiIlimxyEGCRSJiq-j8yyjPJ6VZ4&m=Vmml-rx3t63ZbbXZ0XaESAM9yAlexE29R-giTbcj4Qk&s=57jKIj8BAydbLpftLt5Ssva7vD6GuoCaIpjTi-sB5kU&e= > Fixes: f2ddaf8dfd4a ("PCI: Apply Cavium ThunderX ACS quirk to more Root Ports") > Fixes: b404bcfbf035 ("PCI: Add ACS quirk for all Cavium devices") > Signed-off-by: George Cherian <george.cherian@xxxxxxxxxxx> > Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> > Cc: stable@xxxxxxxxxxxxxxx # v4.12+ > > diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c > index 320255e5e8f8..4e5048cb5ec6 100644 > --- a/drivers/pci/quirks.c > +++ b/drivers/pci/quirks.c > @@ -4311,17 +4311,24 @@ static int pci_quirk_amd_sb_acs(struct pci_dev *dev, u16 acs_flags) > #endif > } > > +static const u16 pci_quirk_cavium_acs_ids[] = { > + 0xa180, 0xa170, /* CN88xx family of devices */ > + 0xaf84, /* CN99xx family of devices */ > + 0xb884, /* CN11xxx family of devices */ > +}; > + > static bool pci_quirk_cavium_acs_match(struct pci_dev *dev) > { > - /* > - * Effectively selects all downstream ports for whole ThunderX 1 > - * family by 0xf800 mask (which represents 8 SoCs), while the lower > - * bits of device ID are used to indicate which subdevice is used > - * within the SoC. > - */ > - return (pci_is_pcie(dev) && > - (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT) && > - ((dev->device & 0xf800) == 0xa000)); > + int i; > + > + if (!pci_is_pcie(dev) || pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT) > + return false; > + > + for (i = 0; i < ARRAY_SIZE(pci_quirk_cavium_acs_ids); i++) > + if (pci_quirk_cavium_acs_ids[i] == dev->device) > + return true; > + > + return false; > } > > static int pci_quirk_cavium_acs(struct pci_dev *dev, u16 acs_flags)
