diff options
author | Bjorn Helgaas <bhelgaas@google.com> | 2017-07-02 18:49:49 -0500 |
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committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-07-02 18:49:49 -0500 |
commit | 8cd93850347bb4487d332d6638a22c7686ae237d (patch) | |
tree | 85b22746847e5690692245d5d3a5d2b0ea93dff5 /arch/x86/pci/fixup.c | |
parent | 74da4a0180fb2091802087764e67ac5e53667217 (diff) | |
parent | 13cfc732160f7bc7e596128ce34cda361c556966 (diff) |
Merge branch 'pci/resource' into next
* pci/resource:
PCI: Work around poweroff & suspend-to-RAM issue on Macbook Pro 11
PCI: Do not disregard parent resources starting at 0x0
Conflicts:
arch/x86/pci/fixup.c
Diffstat (limited to 'arch/x86/pci/fixup.c')
-rw-r--r-- | arch/x86/pci/fixup.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/x86/pci/fixup.c b/arch/x86/pci/fixup.c index 2259acdcede5..11e407489db0 100644 --- a/arch/x86/pci/fixup.c +++ b/arch/x86/pci/fixup.c @@ -586,3 +586,35 @@ static void pci_fixup_amd_ehci_pme(struct pci_dev *dev) >> PCI_PM_CAP_PME_SHIFT); } DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x7808, pci_fixup_amd_ehci_pme); + +/* + * Apple MacBook Pro: Avoid [mem 0x7fa00000-0x7fbfffff] + * + * Using the [mem 0x7fa00000-0x7fbfffff] region, e.g., by assigning it to + * the 00:1c.0 Root Port, causes a conflict with [io 0x1804], which is used + * for soft poweroff and suspend-to-RAM. + * + * As far as we know, this is related to the address space, not to the Root + * Port itself. Attaching the quirk to the Root Port is a convenience, but + * it could probably also be a standalone DMI quirk. + * + * https://bugzilla.kernel.org/show_bug.cgi?id=103211 + */ +static void quirk_apple_mbp_poweroff(struct pci_dev *pdev) +{ + struct device *dev = &pdev->dev; + struct resource *res; + + if ((!dmi_match(DMI_PRODUCT_NAME, "MacBookPro11,4") && + !dmi_match(DMI_PRODUCT_NAME, "MacBookPro11,5")) || + pdev->bus->number != 0 || pdev->devfn != PCI_DEVFN(0x1c, 0)) + return; + + res = request_mem_region(0x7fa00000, 0x200000, + "MacBook Pro poweroff workaround"); + if (res) + dev_info(dev, "claimed %s %pR\n", res->name, res); + else + dev_info(dev, "can't work around MacBook Pro poweroff issue\n"); +} +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x8c10, quirk_apple_mbp_poweroff); |