RE: [PATCH 4/5] PCI: only return true when dev io state is really changed

-...@vger.kernel.org; linux-kernel@vger.kernel.org; Jia, Pei P Subject: Re: [PATCH 4/5] PCI: only return true when dev io state is really changed On Thu, Sep 24, 2020 at 10:34:22PM -0400, Ethan Zhao wrote: > When uncorrectable error happens, AER driver and DPC driver interrupt > handlers

Re: [PATCH 4/5] PCI: only return true when dev io state is really changed

On Thu, Sep 24, 2020 at 10:34:22PM -0400, Ethan Zhao wrote: > When uncorrectable error happens, AER driver and DPC driver interrupt > handlers likely call >pcie_do_recovery()->pci_walk_bus()->report_frozen_detected() with > pci_channel_io_frozen the same time. Call chains are better to read if

Re: [PATCH 4/5] PCI: only return true when dev io state is really changed

Hi Ethan, On 9/24/20 9:34 PM, Ethan Zhao wrote: When uncorrectable error happens, AER driver and DPC driver interrupt handlers likely call pcie_do_recovery()->pci_walk_bus()->report_frozen_detected() with pci_channel_io_frozen the same time. If pci_dev_set_io_state() return true even if

[PATCH 4/5] PCI: only return true when dev io state is really changed

When uncorrectable error happens, AER driver and DPC driver interrupt handlers likely call pcie_do_recovery()->pci_walk_bus()->report_frozen_detected() with pci_channel_io_frozen the same time. If pci_dev_set_io_state() return true even if the original state is pci_channel_io_frozen, that wil