Re: r8152: data corruption in various scenarios

[Mark Lord <mlord@pobox.com>]

On 2019-01-06 2:14 p.m., Kai Heng Feng wrote:>> On Jan 5, 2019, at 10:14 PM, Mark Lord
<mlord@pobox.com> wrote:
..
>> There is even now a special hack in the upstream r8152.c to attempt to detect
>> a Dell TB16 dock and disable RX Aggregation in the driver to prevent such issues.
>>
>> Well.. I have a WD15 dock, not a TB16, and that same hack also catches my dock
>> in its net:
>>
>>    [5.794641] usb 4-1.2: Dell TB16 Dock, disable RX aggregation
> 
> The serial should be unique according to Dell.
>
>> So one issue is that the code is not correctly identifying the dock,
>> and the WD15 is claimed to be immune from the r8152 issues.
> 
> The WD15 I tested didn't use that serial number though...

What info do you need from me about the WD15 so this can be corrected?

>>   xhci_hcd 0000:39:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 13
>> comp_code 1
> 
> This is probably an xHC bug. A similar issue is fixed by commit 9da5a1092b13
> ("xhci: Bad Ethernet performance plugged in ASM1042A host”). 
> 
>> I just got that exact message above, with the r8152 in my 1-day old WD15 dock,
>> with the TB16 "workaround" enabled in Linux kernel 4.20.0.
> 
> Is the xHC WD15 connected an ASMedia one?

I don't know.  I *think* it identifies as a DSL6340 (see below).

Here is lspci and lsusb:

$ lspci -vt
-[0000:00]-+-00.0  Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers
           +-02.0  Intel Corporation UHD Graphics 620
           +-04.0  Intel Corporation Skylake Processor Thermal Subsystem
           +-14.0  Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller
           +-14.2  Intel Corporation Sunrise Point-LP Thermal subsystem
           +-15.0  Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0
           +-15.1  Intel Corporation Sunrise Point-LP Serial IO I2C Controller #1
           +-16.0  Intel Corporation Sunrise Point-LP CSME HECI #1
           +-1c.0-[01-39]----00.0-[02-39]--+-00.0-[03]--
           |                               +-01.0-[04-38]--
           |                               \-02.0-[39]----00.0  Intel Corporation DSL6340 USB 3.1
Controller [Alpine Ridge]
           +-1c.4-[3a]----00.0  Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter
           +-1d.0-[3b]----00.0  Samsung Electronics Co Ltd Device a808
           +-1f.0  Intel Corporation Device 9d4e
           +-1f.2  Intel Corporation Sunrise Point-LP PMC
           +-1f.3  Intel Corporation Sunrise Point-LP HD Audio
           \-1f.4  Intel Corporation Sunrise Point-LP SMBus
$ lsusb -t
/:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 10000M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/7p, 5000M
        |__ Port 2: Dev 3, If 0, Class=Vendor Specific Class, Driver=r8152, 5000M
/:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/7p, 480M
        |__ Port 5: Dev 3, If 1, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 5: Dev 3, If 2, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 5: Dev 3, If 0, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 5: Dev 3, If 3, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 6: Dev 4, If 0, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 6: Dev 4, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 6: Dev 4, If 2, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 7: Dev 5, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/12p, 480M
    |__ Port 3: Dev 2, If 0, Class=Wireless, Driver=btusb, 12M
    |__ Port 3: Dev 2, If 1, Class=Wireless, Driver=btusb, 12M

Thanks for having a look.
-- 
Mark Lord
Real-Time Remedies Inc.
mlord@pobox.com