Re: ftdi_sio usb-serial driver and hotplug

["Anton Fedorov" <datacompboy@call2ru.com>]

В письме от Срд, 25 Фев 2009, 19:25 Kay Sievers пишет:
> On Wed, Feb 25, 2009 at 14:12, Anton Fedorov <datacompboy@call2ru.com> wrote:
>>
>> В письме от Втр, 24 Фев 2009, 22:16 Kay Sievers пишет:
>>>>   I have tried to setup udev, by putting into /etc/udev/rules.d/
>>>>   file z99_ftdi.rules with contents:
>>>> DRIVER="ftdi_sio", SUBSYSTEM="usb-serial", ATTR{latency_timer}="1"
>>>>   test of rules show that it should correctly write on connection,
>>>>   but after reconnect of device it doesn't have latency_timer
>>>>   changed -- it still have 16 latency set :(
>>> Try DRIVERS=, it should work here, because the parent device is also
>>> created by the same driver. The driver value may not be set at the
>>> time the event is processed, because the driver is binding to the
>>> device not already bound.

Sorry for wrong answer last time -- instead of "reply to list" clicked "reply
private" :) yes, you right -- using "DRIVERS=" fixed problem, now latency
correctly set up.
Many thanks!

But why that difference? udevinfo --attribute-walk shows DRIVER="" related to
device, and  http://reactivated.net/writing_udev_rules.html says "you cannot
mix-and-match attributes from multiple parent devices - your rule will not
work".


-- 
Regards,
Anton Fedorov
Call2ru service