linux-kernel - BUG: USB3.0 µPD720200 complains about over-current

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <1286985669.4853.14.camel@x41.itrotid.ee>
Date:	Wed, 13 Oct 2010 19:01:09 +0300
From:	Tõnu Samuel <tonu@....ee>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Cc:	tonu@....ee
Subject: BUG: USB3.0 µPD720200 complains about
 over-current

Hi!

I know, this is place where only Gods speak and others not. But I am
sure there is something odd I found and someone here can take care of
it.

In situation when nothing is connected to any USB ports Ubuntu 10.04.1
stock kernel complains:
spider@...der:~$ zcat /var/log/kern.log.2.gz | grep -i current | head
Sep 29 23:30:12 spider kernel: [    9.048388] hub 8-0:1.0: over-current
change on port 1
Sep 29 23:30:12 spider kernel: [    9.152036] hub 8-0:1.0: over-current
change on port 2
Sep 29 23:30:12 spider kernel: [    9.256038] hub 8-0:1.0: over-current
change on port 3
Sep 29 23:30:12 spider kernel: [    9.360037] hub 8-0:1.0: over-current
change on port 1
Sep 29 23:30:12 spider kernel: [    9.464036] hub 8-0:1.0: over-current
change on port 2
Sep 29 23:30:12 spider kernel: [    9.570621] hub 8-0:1.0: over-current
change on port 3
Sep 29 23:30:12 spider kernel: [    9.672037] hub 8-0:1.0: over-current
change on port 1
Sep 29 23:30:12 spider kernel: [    9.776038] hub 8-0:1.0: over-current
change on port 2
Sep 29 23:30:12 spider kernel: [    9.880049] hub 8-0:1.0: over-current
change on port 3
Sep 29 23:30:13 spider kernel: [    9.984041] hub 8-0:1.0: over-current
change on port 1
spider@...der:~$ 

This runs forever and makes computer busy forever just running those
messages. I verified same behavior exists with vanilla 2.6.35.7.
Disabling USB3.0 in BIOS turns off problem and all USB2 ports remain to
work. So probably this is xHCI driver who complains. I looked bit around
in source and see it is copied from USB2 code and possibly USB3 has
something different. I've read USB3 can supply more power, so possibly
something here has changed.

My hardware:

Motherboard ASUS M4A88T-I Deluxe
http://www.asus.com/product.aspx?P_ID=jGAoIFEziW5sPYy7

it has USB3 chip "NEC D720200F1" on it:
http://digi.physic.ut.ee/mw/images/d/de/20100926_digi_007.png

NEC is joined Renesas, so this is his link for datasheet etc:
http://www2.renesas.com/usb/en/product/upd720200.html

If you propose patch, I can give him test run.

   Tõnu

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/