Hi,
this is really patch v6. Missed to change the email subject. My bad.
Best regards,
Stefan Mätje
Am Mittwoch, den 01.12.2021, 23:03 +0100 schrieb Stefan Mätje:
> The purpose of this patch is to introduce a new CAN driver to support
> the esd GmbH 402 family of CAN interface boards. The hardware design
> is based on a CAN controller implemented in a FPGA attached to a
> PCIe link.
>
> More information on these boards can be found following the links
> included in the commit message.
>
> This patch supports all boards but will operate the CAN-FD capable
> boards only in Classic-CAN mode. The CAN-FD support will be added
> when the initial patch has stabilized.
>
> The patch is reuses the previous work of my former colleague:
> Link:
> https://lore.kernel.org/linux-can/1426592308-23817-1-git-send-email-thomas.koerper@xxxxxx/
>
> *Note*: scripts/checkpatch.pl still emits the following warnings:
> - esd_402_pci-core.c:270: Possible unnecessary 'out of memory' message
> This error message is there to tell the user that the DMA allocation
> failed and not an allocation for normal kernel memory.
> - esdacc.h:255: The irq_cnt pointer is still declared volatile and
> this has a reason and is explained in detail in the header
> referencing the exception noted in volatile-considered-harmful.rst.
>
> The patch is based on the linux-can-next testing branch.
>
> Changes in v6:
> - Fixed the statistic handling of RX overrun errors and increase
> net_device_stats::rx_errors instead of net_device_stats::rx_dropped.
> - Added a patch to not increase rx statistics when generating a CAN
> rx error message frame as suggested on the linux-can list.
> - Added a patch to not not increase rx_bytes statistics for RTR frames
> as suggested on the linux-can list.
>
> The last two patches change the statistics handling from the previous
> style used in other drivers to the newly suggested one.
>
