Re: CAN-USB adapter unplug

["Stefan Mätje" <Stefan.Maetje@esd.eu>]

Am 29.11.2017 um 13:20 schrieb Marc Kleine-Budde:
> On 11/28/2017 10:09 PM, Martin Kelly wrote:
>>> Both applied to can.
>>
>> Thanks! By the way as far as I can tell from code inspection, it appears 
>> that most of the other drivers in net/can/usb should have the same 
>> disconnect bug. gs_usb appears to be clear, as it returns in its default 
>> case. Unfortunately mcba_usb is the only device I have to test with, but 
>> those with other devices may want to check for this.
> 
> Can you create patches for the affected drivers and send them to the
> list and the maintainers of the driver on Cc?
> 
> I don't have access to every USB adapter neither.
> 
> Marc
> 

Hi,

I have seen Martin's emails these days and tried to reproduce the error here
with an esd CAN-USB/2 device (handled by esd_usb2.c). The only thing I get 
in the log are some messages like this:

kernel: [14776.152459] usb 2-1: Rx URB aborted (-71)

There is no endless loop. How could I reproduce the bad behavior? For the
quick test I used an Ubuntu 4.4.0-101-generic kernel.

In any case I will add the patch handling EPIPE on a test system and have a 
look what it might change.

Regards,
Stefan Mätje

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Dipl.-Ing. Stefan Mätje
System-Design

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