linux-kernel - Re: r8169 with 64bit DMA is broken

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Message-ID: <20100331092315.1a5ac86a@gmail.com>
Date:	Wed, 31 Mar 2010 09:23:15 -0300
From:	Ismael Luceno <ismael.luceno@...il.com>
To:	Robert Hancock <hancockrwd@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: r8169 with 64bit DMA is broken

El Mon, 29 Mar 2010 20:15:47 -0600
Robert Hancock <hancockrwd@...il.com> escribió:
> That sounds similar to a previous report.. Can you CC the thread on
> linux-kernel (if you've seen it)?

Sorry, I am not subscribed.

> Also, what does dmesg show when loading the driver? There should be a
> string showing the chip version, something like this:
<...>

r8169 0000:05:00.0: eth0: RTL8102e at 0xffffc900100be000,
00:26:b9:a0:33:86, XID 04e00000 IRQ 28

Then, after initialization, it shows two "link up" messages, and that's
all it reports. It's a nice blackhole :P.

> On Mon, Mar 29, 2010 at 2:05 AM, Ismael Luceno
> <ismael.luceno@...il.com> wrote:
> > On 2.6.33 it worked fine, but then I decided to upgrade to
> > 2.6.34-rc2 and it simply didn't detected the carrier correctly
> > anymore (it was like if the cable was always plugged...).
> >
> > After a short inspection, the obvious offender was commit
> > 353176888386d9025062a12dcec08d49af10cf2c.
> >
> > I tried with use_dac=0, but it didn't work (I had no time to
> > investigate it further), but after reverting the commit it worked
> > again.
> >
> > The system is a Dell Inspiron mini 1012, lspci reports:
> > 05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
> > RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02)
> > Subsystem: Dell Device 041a Flags: bus master, fast devsel, latency
> > 0, IRQ 28 I/O ports at 2000 [size=256]
> >        Memory at f0f20000 (64-bit, prefetchable) [size=4K]
> >        Memory at f0f10000 (64-bit, prefetchable) [size=64K]
> >        [virtual] Expansion ROM at f0f40000 [disabled] [size=128K]
> >        Capabilities: <access denied>
> >        Kernel driver in use: r8169
> >        Kernel modules: r8169
> >
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