[PATCH] usb: ehci: Fix "EHCI timed out on TD - token=XXXX" error on ehci-hcd

[Tom Rini]

On Mon, Mar 02, 2020 at 01:39:49AM +0100, Marek Vasut wrote:
> On 3/2/20 12:04 AM, Tom Rini wrote:
> [...]
> 
> >>> 3 USB Device(s) found
> >>>        scanning usb for ethernet devices... 0 Ethernet Device(s) found
> >>> Hit any key to stop autoboot:  2  0 
> >>> BeagleBoard # usb tree
> >>> USB device tree:
> >>>   1  Hub (480 Mb/s, 0mA)
> >>>   |  u-boot EHCI Host Controller 
> >>>   |
> >>>   |+-2  Hub (480 Mb/s, 2mA)
> >>>     |
> >>>     |+-3  See Interface (480 Mb/s, 0mA)
> >>>          ??????????? ??????????? ???????????
> >>>        
> >>> BeagleBoard # 
> >>>
> >>> Note that the hub and ethernet are on-SBC and not something I'm plugging
> >>> in.  Thanks!
> >>
> >> The device #3 is a usb mass storage or what is it ?
> > 
> > It's a usb ethernet device.
> > 
> >> Can you try and implement usb_get_max_xfer_size for musb and make it
> >> report 240*512 unconditionally (*size = 240*512; return 0;) ? I think
> >> that would "fix" it for you on omap too.
> > 
> > I'll pencil in some time to try that, thanks.
> 
> That's not gonna help you with USB ethernet. I recall seeing flakiness
> with asix devices, maybe that's what you're running into?
> 
> Do you have any further details on that device ? lsusb -vvv would help.

I can only give:

BeagleBoard # usb info
1: Hub,  USB Revision 2.0
 - u-boot EHCI Host Controller
 - Class: Hub
 - PacketSize: 64  Configurations: 1
 - Vendor: 0x0000  Product 0x0000 Version 1.0
   Configuration: 1
   - Interfaces: 1 Self Powered 0mA
     Interface: 0
     - Alternate Setting 0, Endpoints: 1
     - Class Hub
     - Endpoint 1 In Interrupt MaxPacket 8 Interval 255ms

2: Hub,  USB Revision 2.0
 - Class: Hub
 - PacketSize: 64  Configurations: 1
 - Vendor: 0x0424  Product 0x9514 Version 2.0
   Configuration: 1
   - Interfaces: 1 Self Powered Remote Wakeup 2mA
     Interface: 0
     - Alternate Setting 0, Endpoints: 1
     - Class Hub
     - Endpoint 1 In Interrupt MaxPacket 1 Interval 12ms
     - Endpoint 1 In Interrupt MaxPacket 1 Interval 12ms

3: Vendor specific,  USB Revision 2.0
 - Class: Vendor specific
 - PacketSize: 64  Configurations: 1
 - Vendor: 0x0424  Product 0xec00 Version 2.0
   Configuration: 1
   - Interfaces: 1 Self Powered Remote Wakeup 2mA
     Interface: 0
     - Alternate Setting 0, Endpoints: 3
     - Class Vendor specific
     - Endpoint 1 In Bulk MaxPacket 512
     - Endpoint 2 Out Bulk MaxPacket 512
     - Endpoint 3 In Interrupt MaxPacket 16 Interval 4ms

As the old Fedora core image on the SD card there isn't happy and I
don't have time to dig in to that problem right now.  But please note
that the issue here is a relatively recent regression as Guillaume
reported.

-- 
Tom
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