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SubjectRe: Udev coldplugging loads 8139too driver instead of 8139cp
Date
Ondrej Zary wrote:

> On Tuesday 29 January 2008 11:43:53 Michael Tokarev wrote:
>> Stephen Hemminger wrote:
>> > On Tue, 29 Jan 2008 03:46:08 +0300
>> > Michael Tokarev <mjt@tls.msk.ru> wrote:
>>
>> []
>>
>> >> There are 2 drivers for 8139-based NICs. For really different two
>> >> kinds
>> >> of hardware, which both uses the same PCI identifiers. Both drivers
>> >> "claims" to work with all NICs with those PCI ids, because
>> >> "externally" (by means of udev for example) it's impossible to
>> >> distinguish the two kinds of hardware, it becomes clean only when the
>> >> driver (either of the two) loads and actually checks which hardware we
>> >> have here.
>> >
>> > Is there any chance of using subdevice or subversion to tell them
>> > apart? That worked for other vendors like DLINK who slapped same ID on
>> > different cards.
>>
>> If it were that simple... ;)
>>
>> No. The difference is in PCI revision number (byte #8 in PCI config
>> space). If it's >= 0x40 - it's 8139too, < 0x40 - 8139cp. Or 0x20 - I
>> forgot.
>
> Perhaps a module could be created that will claim this device ID and then
> use the correct driver.
>

C'mon, really ...

echo 'alias ...v000010ECd00008139... 8139too' >> /etc/modprobe.conf

>> Here's a code snippet from a shell script I used ages ago to
>> automatically load modules (similar to what udev does nowadays):
>>
>> # special hack for 8139{too,cp} stuff
>> case "$modalias" in
>> *v000010ECd00008139*)
>> rev="$(dd if="$1/config" bs=1 skip=8 count=1 2>/dev/null)"
>> if [ -n "$rev" ]; then
>> list=
>> for module in $modlist; do
>> case "$module" in
>> 8139cp)
>> if [ ".$rev" \< ". " ]; then
>> $vecho1 "$TAG: not loading $module for this device"
>> continue
>> fi
>> ;;
>> 8139too)
>> if [ ".$rev" \> ". " ]; then
>> $vecho1 "$TAG: not loading $module for this device"
>> continue
>> fi
>> ;;
>> esac
>> list="$list $module"
>> done
>> modlist="$list"
>> fi
>> ;;
>> esac
>>
>> /mjt
>> --
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>
>
>




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