net: smsc95xx: aligment issues

net: smsc95xx: aligment issues

[Stefan Wahren]

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

RE: smsc95xx: aligment issues

[Woojung.Huh]

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@i2se.com]
> Sent: Saturday, April 28, 2018 3:59 AM
> To: Nisar Sayed - I17970 <Nisar.Sayed@microchip.com>; Woojung Huh - C21699
> <Woojung.Huh@microchip.com>
> Cc: David S. Miller <davem@davemloft.net>; linux-usb <linux-usb@vger.kernel.org>; netdev
> <netdev@vger.kernel.org>; popcorn mix <popcornmix@gmail.com>; James Hughes
> <james.hughes@raspberrypi.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