Re: [PATCH 1/5 V4] PCI: define a function to check and wait till port finish DPC handling

On Sun, Sep 27, 2020 at 11:33 AM Ethan Zhao wrote: > > Once root port DPC capability is enabled and triggered, at the beginning > of DPC is triggered, the DPC status bits are set by hardware and then > sends DPC/DLLSC/PDC interrupts to OS DPC and pciehp drivers, it will > take the port and softwar

[PATCH 1/5 V4] PCI: define a function to check and wait till port finish DPC handling

Once root port DPC capability is enabled and triggered, at the beginning of DPC is triggered, the DPC status bits are set by hardware and then sends DPC/DLLSC/PDC interrupts to OS DPC and pciehp drivers, it will take the port and software DPC interrupt handler 10ms to 50ms (test data on ICS(Ice Lak