On Mon, Apr 11, 2022 at 07:28:50PM +0530, Manivannan Sadhasivam wrote: > PCI core only accepts the quirks for the host devices that could be passed onto > the PCI device drivers like this one. In this case, this is not a quirk but > actually an aggressive power saving feature (atleast on the Qcom platforms). > Moreover, adding a flag to the PCI bus will make it applicable to all the > child devices of the RC/bridge and that would be wrong. As you correctly state it is not a device quirk. It describes the power management applied by the platform. So we do need to communicate it through the core PM and/or PCI code. Please work with the relevant maintainers. > In our case, the same power saving feature is not applicable to all PCI devices > like WLAN for an example. This doesn't make sense. Your plaform can't know what device is connected to a given root port / slot. So you might have different policies per slot, but that has nothing to do with the Linux drivers for given devices.
