diff options
| author | Bjorn Helgaas <bhelgaas@google.com> | 2019-10-16 23:23:20 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2019-11-21 02:34:47 +0300 |
| commit | baef7f8e5e91f85ce7625c11370479f9f0778fae (patch) | |
| tree | 7e89c8694274a6530b2ebafff73780129883cdca /drivers/pci/pci.c | |
| parent | 993cc6d1bd3af734693a74a3ccc9445dd5b31f9c (diff) | |
| download | linux-baef7f8e5e91f85ce7625c11370479f9f0778fae.tar.xz | |
PCI/PM: Simplify pci_set_power_state()
Check for the PCI_DEV_FLAGS_NO_D3 quirk early, before calling
__pci_start_power_transition(). This way all the cases where we don't need
to do anything at all are checked up front.
This doesn't fix anything because if the caller requested D3hot or D3cold,
__pci_start_power_transition() is a no-op. But calling it is pointless and
makes the code harder to analyze.
Link: https://lore.kernel.org/r/20191101204558.210235-4-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 9378fe5fe475..ea98c77a6512 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1117,8 +1117,6 @@ int pci_set_power_state(struct pci_dev *dev, pci_power_t state) if (dev->current_state == state) return 0; - __pci_start_power_transition(dev, state); - /* * This device is quirked not to be put into D3, so don't put it in * D3 @@ -1126,6 +1124,8 @@ int pci_set_power_state(struct pci_dev *dev, pci_power_t state) if (state >= PCI_D3hot && (dev->dev_flags & PCI_DEV_FLAGS_NO_D3)) return 0; + __pci_start_power_transition(dev, state); + /* * To put device in D3cold, we put device into D3hot in native * way, then put device into D3cold with platform ops |