diff options
| author | Kai-Heng Feng <kai.heng.feng@canonical.com> | 2020-05-06 01:34:21 +0800 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2020-06-29 20:07:51 -0400 |
| commit | edbdbc723b4e0a0a9d6b7dd2808fabf4bd6a0e36 (patch) | |
| tree | 431e95a97159f4707fc9f0c16936d46a5f8d365e /include/linux | |
| parent | 3993a8eb1ed00e6e65457cfc5112c61b5853a755 (diff) | |
PCI/ASPM: Allow ASPM on links to PCIe-to-PCI/PCI-X Bridges
[ Upstream commit 66ff14e59e8a30690755b08bc3042359703fb07a ]
7d715a6c1ae5 ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/linux')
0 files changed, 0 insertions, 0 deletions