From mboxrd@z Thu Jan 1 00:00:00 1970 From: Adrian Bunk Subject: Re: [BUG] skge 0000:02:05: read data parity error Date: Mon, 14 Jan 2008 23:01:05 +0200 Message-ID: <20080114210105.GG9847@does.not.exist> References: <6101e8c40801141157j1ce7d3f0if2e4eb2344b6c844@mail.gmail.com> <20080114125200.28cb4c69@deepthought> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Oliver Pinter =?utf-8?B?KFBpbnTDqXIgT2xpdsOpcik=?= , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, gregkh@suse.de To: Stephen Hemminger Return-path: Content-Disposition: inline In-Reply-To: <20080114125200.28cb4c69@deepthought> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Mon, Jan 14, 2008 at 12:52:00PM -0800, Stephen Hemminger wrote: > On Mon, 14 Jan 2008 20:57:49 +0100 > "Oliver Pinter (Pint=C3=A9r Oliv=C3=A9r)" wro= te: >=20 > > Hi All! > >=20 > > It is fully reproductable under 2.6.22.15, 2.6.23.13 (all tainted a= nd > > not tainted [4 different kernel] ) and 2 different PC: > >=20 > > [BUG] skge 0000:02:05: read data parity error > > [BUG] skge 0000:02:05: read data parity error > >=20 > > steps: > > 1. login as root > > 2. start mc > > 3. cd /sys/bus/pci/drivers/skge/0000:02:05.0 > > 4. press F3 (mcview) on resource0 > > 5. the system hang up, without panic or bug ... only this message > > printed 2x: [BUG] skge 0000:02:05: read data parity error >=20 > This is not a bug. >=20 > The hardware has some debug registers that if accessed cause a read > back to the host. Since this can point anywhere, it will cause errors > or system hang. >=20 > The point is don't do it. Is it really a good idea that _reading_ files under /sys can kill your=20 machine? That sounds like a huge trap for people debugging their machine (or e.g= =2E=20 forgetting to exclude /sys from their backup). cu Adrian --=20 "Is there not promise of rain?" Ling Tan asked suddenly out of the darkness. There had been need of rain for many days. "Only a promise," Lao Er said. Pearl S. Buck - Dragon Seed -- To unsubscribe from this list: send the line "unsubscribe linux-kernel"= in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/