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| author |   Mika Westerberg <mika.westerberg@linux.intel.com> | 2018-09-05 14:09:54 +0300 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2018-09-11 08:47:38 -0500 |
| commit | 50ca031b51106b1b46162d4e9ecccb7edc95682f (patch) | |
| tree | b849a69a1a786a6fbc260de1159cd80b17a5aff5 /drivers/pci/quirks.c | |
| parent | MAINTAINERS: Add Gustavo Pimentel as DesignWare PCI maintainer (diff) | |
| download | linux-dev-50ca031b51106b1b46162d4e9ecccb7edc95682f.tar.xz linux-dev-50ca031b51106b1b46162d4e9ecccb7edc95682f.zip | |
Revert "PCI: Add ACS quirk for Intel 300 series"
This reverts f154a718e6cc ("PCI: Add ACS quirk for Intel 300 series").
It turns out that erratum "PCH PCIe* Controller Root Port (ACSCTLR) Appear
As Read Only" has been fixed in 300 series chipsets, even though the
datasheet [1] claims otherwise. To make ACS work properly on 300 series
root ports, revert the faulty commit.
[1] https://www.intel.com/content/dam/www/public/us/en/documents/specification-updates/300-series-c240-series-chipset-pch-spec-update.pdf
Fixes: f154a718e6cc ("PCI: Add ACS quirk for Intel 300 series")
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: stable@vger.kernel.org # v4.18+
Diffstat (limited to 'drivers/pci/quirks.c')
| -rw-r--r-- | drivers/pci/quirks.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index ef7143a274e0..6bc27b7fd452 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -4355,11 +4355,6 @@ static int pci_quirk_qcom_rp_acs(struct pci_dev *dev, u16 acs_flags) * * 0x9d10-0x9d1b PCI Express Root port #{1-12} * - * The 300 series chipset suffers from the same bug so include those root - * ports here as well. - * - * 0xa32c-0xa343 PCI Express Root port #{0-24} - * * [1] http://www.intel.com/content/www/us/en/chipsets/100-series-chipset-datasheet-vol-2.html * [2] http://www.intel.com/content/www/us/en/chipsets/100-series-chipset-datasheet-vol-1.html * [3] http://www.intel.com/content/www/us/en/chipsets/100-series-chipset-spec-update.html @@ -4377,7 +4372,6 @@ static bool pci_quirk_intel_spt_pch_acs_match(struct pci_dev *dev) case 0xa110 ... 0xa11f: case 0xa167 ... 0xa16a: /* Sunrise Point */ case 0xa290 ... 0xa29f: case 0xa2e7 ... 0xa2ee: /* Union Point */ case 0x9d10 ... 0x9d1b: /* 7th & 8th Gen Mobile */ - case 0xa32c ... 0xa343: /* 300 series */ return true; } |