lkml.org 
[lkml]   [2012]   [Jan]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: loading firmware while usermodehelper disabled.
From
Date


Matthew Garrett <mjg@redhat.com> wrote:

>On Mon, Jan 02, 2012 at 11:31:55PM +0000, Jack Stone wrote:
>
>> Rather than merging the drivers we could make the uvcvideo (or any
>other
>> generic driver) driver expose a "subdriver" interface that allows
>> another module to bind to the specific ID and add extra handling to
>> certain events. We could then use that interface to provide a
>firmware
>> driver for each device that needs it. The firmware driver could bind
>to
>> the bootstrap device and to the uvcvideo subdriver interface and it
>> would then have all the lifetime info we need. [Credit to Linus for
>> suggesting this idea]
>
>No, the uvcvideo driver would need to call out to load the firmware
>loader driver, otherwise you'll never know to load the firmware loader
>driver.

So we have a table of USB ids that list the devices that need firmware drivers. When the uvcvideo driver registers the firmware interface with a USB id that matches the list we load the firmware driver and pass it a "warm start" event so it can cache the firmware.

As long as we can identify the devices that *might* need firmware then we are ok.

Thanks,

Jack

--
Sent from my Android phone with K-9 Mail. Please excuse my brevity.


\
 
 \ /
  Last update: 2012-01-03 01:25    [from the cache]
©2003-2011 Jasper Spaans