linux-kernel - gianfar ethernet driver losses Rx-Messages

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Message-ID: <CADSz7_efMoSG9wYr_jaaXtG8YB0FkhB4862iL40Y-BeUw+UB+A@mail.gmail.com>
Date:   Mon, 11 Apr 2022 12:01:04 +0530
From:   Vishnu Motghare <vishnumotghare@...il.com>
To:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Cc:     claudiu.manoil@....com, davem@...emloft.net, kuba@...nel.org
Subject: gianfar ethernet driver losses Rx-Messages

I have Freescale LS1021A target with kernel version - 5.10.35-rt. The
device has 3 ethernet ports & one of the ports is used for EtherCAT.
The Samba service is running on the device, which configures on all
interfaces by default. We have observed that EtherCAT master losses RX
messages frequently. On analyzing the tcpdump messages, it is seen
that loss of RX message is seen immediately after NetBIOS packets
which are from the samba service. The loss of message counter reported
by EtherCat Master & Kernel driver is the same. To get the missed RX
error I've applied a patch from the mainline kernel -
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/patch/drivers/net/ethernet/freescale/gianfar.c?id=14870b75fe0be5c565339f008ba25326f86a7ce8

How gianfar ethernet driver lose RX messages immediately after NetBios
packets? Any help is appreciated.

ifconfig output:

ETH1 Link encap:Ethernet  HWaddr 70:B3:D5:AB:45:73
          inet addr:192.168.137.248  Bcast:255.255.255.255  Mask:255.255.255.0
          UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
          RX packets:737729 errors:0 dropped:8 overruns:0 frame:0
          TX packets:737753 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:96268280 (91.8 MiB)  TX bytes:96273512 (91.8 MiB)
          Base address:0x3000