On Mon, Feb 26, 2018 at 04:21:07PM +0300, Mika Westerberg wrote: > Hi, > > When Thunderbolt controller is configured to be in native enumeration mode > it actually includes two slightly different modes. First there is non-RTD3 > mode where the Thunderbolt host controller is only present when there is a > device connected. The second one is RTD3 mode where the controller is > always present. > > In non-RTD3 mode the Thunderbolt host controller (NHI) and USB host (xHCI) > controller are not hotplugged using native PCIe hotplug but instead they > will be hotplugged via BIOS triggered ACPI Notify() to the root port. This > is done to preserve resources since the NHI and xHCI only need 1 MB of MMIO > space and no additional buses. Currently Linux does not support this very > well and ends up failing the hotplug in one way or another. More detailed > explanation is in changelog of patch [4/5]. > > This series fixes this issue and in addition includes fixes for few other > issues found during testing on a system that has Thunderbolt controller in > non-RTD3 native PCIe enumeration mode. However, the fixes here are not in > any way Thunderbolt specific and should be applicable to other systems as > well. > > The previous versions of the patch series can be found here: > > v2: https://www.spinics.net/lists/linux-pci/msg69186.html > v1: https://www.spinics.net/lists/linux-acpi/msg80607.html > > Changes from v2: > > - Added Rafael's tag to patch [1/5]. > - Updated changelog of patch [1/5] to include more details about how the > problem can be observed from dmesg and lspci output. > > Changes from v1: > > - Drop 'cmax - max ?: 1' and use similar construct than we use in second > pass loop in patch [1/5]. > - Drop unnecessary parentheses in patch [1/5]. > - Added Rafael's tag to patches [2-5/5]. Hi Bjorn, Do you have any comments on the series? It would be nice to get it merged for v4.17 if no objections. Thanks!
