netdev - RE: smsc95xx: aligment issues

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Date:   Mon, 30 Apr 2018 15:44:24 +0000
From:   <Woojung.Huh@...rochip.com>
To:     <stefan.wahren@...e.com>, <Nisar.Sayed@...rochip.com>
CC:     <davem@...emloft.net>, <linux-usb@...r.kernel.org>,
        <netdev@...r.kernel.org>, <popcornmix@...il.com>,
        <james.hughes@...pberrypi.org>
Subject: RE: smsc95xx: aligment issues

Hi Stefan,

Thanks for report. We will try to repro issue and contact you if need more details.

Regards,
Woojung

> -----Original Message-----
> From: Stefan Wahren [mailto:stefan.wahren@...e.com]
> Sent: Saturday, April 28, 2018 3:59 AM
> To: Nisar Sayed - I17970 <Nisar.Sayed@...rochip.com>; Woojung Huh - C21699
> <Woojung.Huh@...rochip.com>
> Cc: David S. Miller <davem@...emloft.net>; linux-usb <linux-usb@...r.kernel.org>; netdev
> <netdev@...r.kernel.org>; popcorn mix <popcornmix@...il.com>; James Hughes
> <james.hughes@...pberrypi.org>
> Subject: net: smsc95xx: aligment issues
> 
> Hi,
> after connecting a Raspberry Pi 1 B to my local network i'm seeing aligment issues under
> /proc/cpu/alignment:
> 
> User:		0
> System:		142 (_decode_session4+0x12c/0x3c8)
> Skipped:	0
> Half:		0
> Word:		0
> DWord:		127
> Multi:		15
> User faults:	2 (fixup)
> 
> I've also seen outputs with _csum_ipv6_magic.
> 
> Kernel config: bcm2835_defconfig
> Reproducible kernel trees: current linux-next, 4.17-rc2 and 4.14.37 (i didn't test older versions)
> 
> Please tell if you need more information to narrow down this issue.
> 
> Best regards
> Stefan