linux-kernel - [PATCH] ucc_geth: invalid rx checksum error values

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Date:	Wed, 22 Oct 2014 13:07:02 +0000
From:	"Kokoris, Ioannis" <ioannis.kokoris@...fy.com>
To:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>
CC:	"timur@...escale.com" <timur@...escale.com>
Subject: [PATCH] ucc_geth: invalid rx checksum error values

Hi, 

The value in QE UCC ethernet interfaces shows random values:

# ethtool -S eth0
NIC statistics:
     ...
     rx-ip-checksum-errors: 3933892214

The problem is located in a mismatch between the rx_fw_stat_gstrings fields
- used in ucc_geth_ethtool - and the ucc_geth_rx_firmware_statistics_pram
fields - used in ucc_geth.
Although the QE UCC Ethernet Controller includes the Rx checksum error
counter in the 'Rx firmware counters', the related field is missing from the
ucc_geth driver.  
After adding the RxChecksumError field in
ucc_geth_rx_firmware_statistics_pram structure the counter works fine.



Signed-off-by: Ioannis Kokkoris <ioannis.kokoris@...fy.com>


diff -Nru a/drivers/net/ethernet/freescale/ucc_geth.h
b/drivers/net/ethernet/freescale/ucc_geth.h
--- a/drivers/net/ethernet/freescale/ucc_geth.h 2014-10-22
15:19:16.000000000 +0300
+++ b/drivers/net/ethernet/freescale/ucc_geth.h 2014-10-22
15:24:39.000000000 +0300
@@ -541,6 +541,8 @@
                                   replaced */
        u32 insertvlan;         /* total frames that had their VLAN tag
                                   inserted */
+       u32 checksumerr;        /* total frames that have IP Checksum Error
+                                */
 } __packed;

 struct ucc_geth_rx_interrupt_coalescing_entry {



Best Regards,
Ioannis

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