Hi Diana,
We've pushed a patch to fix a potential issue around the handling of the echo frames. It has been included in 4.15. Are you able to build and run this version of the Kernel?
Regards,
> -----Original Message-----
> From: Diana Burgess <diana@xxxxxxxxxxxxxxxx>
> Sent: vendredi 23 février 2018 02:23
> To: Stéphane Grosjean <s.grosjean@xxxxxxxxxxxxxxx>; linux-
> can@xxxxxxxxxxxxxxx; linux-rt-users@xxxxxxxxxxxxxxx
> Cc: Philipp Schrader <philipp@xxxxxxxxxxxxxxxx>
> Subject: peak_pciefd 0000:06:00.0 can1: can_put_echo_skb: BUG! echo_skb
> is occupied!
>
> Hi,
>
> I am seeing the following error:
>
> peak_pciefd 0000:06:00.0 can1: can_put_echo_skb: BUG! echo_skb is
> occupied!
>
> I am running 4.13.10-rt3 kernel using the following PCIe card connect to my
> board:
>
> 06:00.0 Network controller: PEAK-System Technik GmbH Device 0013 (rev 01)
> Subsystem: PEAK-System Technik GmbH Device 0014
> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR- FastB2B- DisINTx-
> Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
> Latency: 0, Cache Line Size: 64 bytes
> Interrupt: pin A routed to IRQ 16
> Region 0: Memory at fb100000 (32-bit, non-prefetchable) [size=64K]
> Capabilities: <access denied>
> Kernel driver in use: peak_pciefd
>
> This occurs when I am sending messages over the CAN bus with and without
> the other device on the bus also sending.
>
> I have not seen this issue with other can devices in similar setups (different
> kernel versions). It also only seems to occur on CAN1 which is set to a higher
> baud rate then all the other buses.
>
> I do have CONFIG PREEMPT RT turned on which might be exposing this issue
> more often.
>
> Has anyone seen this before? Does anyone know how to fix this or have a
> fix?
>
> Thanks,
> Diana Burgess
--
PEAK-System Technik GmbH
Sitz der Gesellschaft Darmstadt - HRB 9183
Geschaeftsfuehrung: Alexander Gach / Uwe Wilhelm
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