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| author |   Bjorn Helgaas <bhelgaas@google.com> | 2021-07-06 10:56:24 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2021-07-06 10:56:24 -0500 |
| commit | e92605b0a0cdafb6c37b9d1ad24fe1cf8280eeb6 (patch) | |
| tree | 36b24d508d7dda8e05062dc49a94e60d105210e0 /drivers/pci | |
| parent | Merge branch 'pci/p2pdma' (diff) | |
| parent | PCI: Leave Apple Thunderbolt controllers on for s2idle or standby (diff) | |
| download | linux-dev-e92605b0a0cdafb6c37b9d1ad24fe1cf8280eeb6.tar.xz linux-dev-e92605b0a0cdafb6c37b9d1ad24fe1cf8280eeb6.zip | |
Merge branch 'pci/pm'
- Leave Apple Thunderbolt controllers on for s2idle or standby so they work
after resume (Konstantin Kharlamov)
* pci/pm:
PCI: Leave Apple Thunderbolt controllers on for s2idle or standby
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/quirks.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index dcb229de1acb..0dde9c5259f2 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -27,6 +27,7 @@ #include <linux/nvme.h> #include <linux/platform_data/x86/apple.h> #include <linux/pm_runtime.h> +#include <linux/suspend.h> #include <linux/switchtec.h> #include <asm/dma.h> /* isa_dma_bridge_buggy */ #include "pci.h" @@ -3634,6 +3635,16 @@ static void quirk_apple_poweroff_thunderbolt(struct pci_dev *dev) return; if (pci_pcie_type(dev) != PCI_EXP_TYPE_UPSTREAM) return; + + /* + * SXIO/SXFP/SXLF turns off power to the Thunderbolt controller. + * We don't know how to turn it back on again, but firmware does, + * so we can only use SXIO/SXFP/SXLF if we're suspending via + * firmware. + */ + if (!pm_suspend_via_firmware()) + return; + bridge = ACPI_HANDLE(&dev->dev); if (!bridge) return; |