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author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-07-21 14:38:08 +0200 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-08-01 14:05:02 +0200 |
commit | baecc470d5fd6e2d94eb2a7e242ba291ac7182ac (patch) | |
tree | b1fa6305b2b2f5e35b52c088148785eddd039010 /drivers/pci/pci.c | |
parent | 16f73eb02d7e1765ccab3d2018e0bd98eb93d973 (diff) | |
download | linux-stable-baecc470d5fd6e2d94eb2a7e242ba291ac7182ac.tar.gz linux-stable-baecc470d5fd6e2d94eb2a7e242ba291ac7182ac.tar.bz2 linux-stable-baecc470d5fd6e2d94eb2a7e242ba291ac7182ac.zip |
PCI / PM: Skip bridges in pci_enable_wake()
PCI bridges only have a reason to generate wakeup signals on behalf
of devices below them, so avoid preparing bridges for wakeup directly
in pci_enable_wake().
Also drop the pci_has_subordinate() check from pci_pm_default_resume()
as this will be done by pci_enable_wake() itself now.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/pci.c')
-rw-r--r-- | drivers/pci/pci.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index af0cc3456dc1..0d142031ebfb 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1912,6 +1912,13 @@ int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable) { int ret = 0; + /* + * Bridges can only signal wakeup on behalf of subordinate devices, + * but that is set up elsewhere, so skip them. + */ + if (pci_has_subordinate(dev)) + return 0; + /* Don't do the same thing twice in a row for one device. */ if (!!enable == !!dev->wakeup_prepared) return 0; |