c6a6330706
Currently pcie_portdrv_probe() activates runtime PM on a PCIe port even if it will never actually suspend because the BIOS is too old or the "pcie_port_pm=off" option was specified on the kernel command line. A few CPU cycles can be saved by not activating runtime PM at all in these cases, because rpm_idle() and rpm_suspend() will bail out right at the beginning when calling rpm_check_suspend_allowed(), instead of carrying out various locking and assignments, invoking rpm_callback(), getting back -EBUSY and rolling everything back. The conditions checked in pci_bridge_d3_possible() are all static, they never change during uptime of the system, hence it's safe to call this to determine if runtime PM should be activated. No functional change intended. Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Lukas Wunner <lukas@wunner.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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| .. | ||
| aer | ||
| aspm.c | ||
| Kconfig | ||
| Makefile | ||
| pcie-dpc.c | ||
| pme.c | ||
| portdrv_acpi.c | ||
| portdrv_bus.c | ||
| portdrv_core.c | ||
| portdrv_pci.c | ||
| portdrv.h | ||
| ptm.c | ||