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66ff14e59e
linux/drivers/pci
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Kai-Heng Feng 66ff14e59e PCI/ASPM: Allow ASPM on links to PCIe-to-PCI/PCI-X Bridges 
7d715a6c1a ("PCI: add PCI Express ASPM support") added the ability for
Linux to enable ASPM, but for some undocumented reason, it didn't enable
ASPM on links where the downstream component is a PCIe-to-PCI/PCI-X Bridge.

Remove this exclusion so we can enable ASPM on these links.

The Dell OptiPlex 7080 mentioned in the bugzilla has a TI XIO2001
PCIe-to-PCI Bridge.  Enabling ASPM on the link leading to it allows the
Intel SoC to enter deeper Package C-states, which is a significant power
savings.

[bhelgaas: commit log]
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=207571
Link: https://lore.kernel.org/r/20200505173423.26968-1-kai.heng.feng@canonical.com
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-05-07 16:39:44 -05:00
..
controller pci-v5.7-changes 2020-04-03 14:25:02 -07:00
endpoint PCI: dwc: Fix dw_pcie_ep_raise_msix_irq() to get correct MSI-X table address 2020-04-02 17:57:10 +01:00
hotplug powerpc updates for 5.7 2020-04-05 11:12:59 -07:00
pcie PCI/ASPM: Allow ASPM on links to PCIe-to-PCI/PCI-X Bridges 2020-05-07 16:39:44 -05:00
switch pci/switchtec: Replace completion wait queue usage for poll 2020-03-21 16:00:20 +01:00
access.c PCI/AER: Save AER Capability for suspend/resume 2019-10-18 17:05:42 -05:00
ats.c PCI/ATS: Export symbols of PASID functions 2020-03-18 21:32:25 +00:00
bus.c PCI: Unexport pci_bus_get() and pci_bus_put() 2019-07-23 18:32:49 -05:00
ecam.c
host-bridge.c
iov.c PCI/IOV: Fix memory leak in pci_iov_add_virtfn() 2019-12-09 15:51:32 -06:00
irq.c
Kconfig Merge branch 'pci/trivial' 2019-11-28 08:54:55 -06:00
Makefile PCI: Allow building PCIe things without PCIEPORTBUS 2019-11-21 07:52:33 -06:00
mmap.c PCI: Fix typos and whitespace errors 2019-07-09 07:24:53 -05:00
msi.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
of.c PCI: Make devm_of_pci_get_host_bridge_resources() static 2019-11-20 17:00:14 +00:00
p2pdma.c PCI/P2PDMA: Add Intel Sky Lake-E Root Ports B, C, D to the whitelist 2020-03-18 18:09:07 -05:00
pci-acpi.c Merge branch 'pci/misc' 2020-04-02 14:26:38 -05:00
pci-bridge-emul.c PCI: pci-bridge-emul: Use new constant PCI_STATUS_ERROR_BITS 2020-03-04 14:21:00 -08:00
pci-bridge-emul.h PCI: pci-bridge-emul: Fix big-endian support 2019-10-17 12:42:48 +01:00
pci-driver.c PCI/PM: Add missing link delays required by the PCIe spec 2019-11-20 17:37:24 -06:00
pci-label.c
pci-mid.c PCI: intel-mid: Convert to new X86 CPU match macros 2020-03-24 21:35:06 +01:00
pci-pf-stub.c PCI: Fix typos and whitespace errors 2019-07-09 07:24:53 -05:00
pci-stub.c
pci-sysfs.c Merge branch 'pci/misc' 2020-04-02 14:26:38 -05:00
pci.c pci-v5.7-changes 2020-04-03 14:25:02 -07:00
pci.h Merge branch 'pci/enumeration' 2020-04-02 14:26:32 -05:00
probe.c Merge branch 'pci/enumeration' 2020-04-02 14:26:32 -05:00
proc.c proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
quirks.c Merge branch 'pci/virtualization' 2020-04-02 14:26:45 -05:00
remove.c
rom.c PCI: Use ioremap(), not phys_to_virt() for platform ROM 2020-03-30 09:52:23 -05:00
search.c Merge branch 'pci/host-vmd' 2020-01-29 17:00:02 -06:00
setup-bus.c PCI: Add support for root bus sizing 2020-03-30 09:52:34 -05:00
setup-irq.c
setup-res.c
slot.c PCI: Add pci_speed_string() 2020-03-10 14:05:33 -05:00
syscall.c PCI: Lock down BAR access when the kernel is locked down 2019-08-19 21:54:15 -07:00
vc.c Merge branch 'pci/trivial' 2019-09-23 16:10:31 -05:00
vpd.c PCI/VPD: Prevent VPD access for Amazon's Annapurna Labs Root Port 2019-09-16 14:10:09 +01:00
xen-pcifront.c