Hi Bjorn, On 7/10/2017 7:09 PM, Bjorn Helgaas wrote: > The PCI_EXP_DEVCTL_EXT_TAG bit controls the behavior of the function as a > Requester. As far as I can see, it has nothing to do with whether the > function supports 8-bit tags as a *Completer*, so the implicit assumption > of the spec is that all Completers always support 8-bit tags. My guess is > that's why the ECN thought it would be safe to enable extended tags by > default. > > If that's the case, this is just a defect in the device (the Completer), > and we should blacklist it. Looking at the PCIe Capability version might > happen to correlate with Completer support for 8-bit tags, but that looks > like just a coincidence to me. Sure, I can change to blacklist. I'll not enable it unless the device is blacklisted via quirks. Sinan -- Sinan Kaya Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.
