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66ff14e59e
linux/drivers/pci/pcie
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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
..
aer_inject.c PCI/AER: Fix the broken interrupt injection 2020-03-08 11:07:12 +01:00
aer.c PCI/AER: Rationalize error status register clearing 2020-03-28 13:19:05 -05:00
aspm.c PCI/ASPM: Allow ASPM on links to PCIe-to-PCI/PCI-X Bridges 2020-05-07 16:39:44 -05:00
bw_notification.c pci-v5.2-changes 2019-05-14 10:30:10 -07:00
dpc.c PCI/AER: Rationalize error status register clearing 2020-03-28 13:19:05 -05:00
edr.c PCI/DPC: Add Error Disconnect Recover (EDR) support 2020-03-28 13:19:04 -05:00
err.c PCI/AER: Rationalize error status register clearing 2020-03-28 13:19:05 -05:00
Kconfig pci-v5.7-changes 2020-04-03 14:25:02 -07:00
Makefile PCI/DPC: Add Error Disconnect Recover (EDR) support 2020-03-28 13:19:04 -05:00
pme.c PCI/PME: Replace dev_printk(KERN_DEBUG) with dev_info() 2019-05-09 16:27:29 -05:00
portdrv_core.c PCI/ERR: Remove service dependency in pcie_do_recovery() 2020-03-28 13:18:54 -05:00
portdrv_pci.c PCI/DPC: Add "pcie_ports=dpc-native" to allow DPC without AER control 2019-10-25 15:11:43 -05:00
portdrv.h PCI/ERR: Remove service dependency in pcie_do_recovery() 2020-03-28 13:18:54 -05:00
ptm.c PCI/PTM: Remove spurious "d" from granularity message 2019-11-21 07:52:32 -06:00