lkml.org 
[lkml]   [2011]   [Jul]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH] drivercore: Add driver probe deferral mechanism
On Tue, Jul 5, 2011 at 11:29 AM, Greg KH <gregkh@suse.de> wrote:
> On Tue, Jul 05, 2011 at 11:17:46AM -0600, Grant Likely wrote:
>> On Tue, Jul 5, 2011 at 10:36 AM, Greg KH <gregkh@suse.de> wrote:
>> > On Tue, Jul 05, 2011 at 10:28:37AM -0600, Grant Likely wrote:
>> >> On Tue, Jul 5, 2011 at 10:11 AM, Kay Sievers <kay.sievers@vrfy.org> wrote:
>> >> > On Tue, Jul 5, 2011 at 17:50, Greg KH <gregkh@suse.de> wrote:
>> >> >
>> >> >> I wonder if doing this all from a workqueue in the first place is going
>> >> >> to cause problems as probe isn't normally done this way at all.
>> >> >
>> >> > Yeah, I would expect unforeseen problems with the async thread too.
>> >> > It's probably all solvable, but it sounds troublesome to find out if
>> >> > things go wrong.
>> >> >
>> >> > We have sync hooks (BUS_NOTIFY_*) where any kind of code can subscribe
>> >> > to when devices get added or get bound to a driver. Can't the code
>> >> > that relies on later hookups to already existing devices/bindings not
>> >> > just plug into that?
>> >>
>> >> I tried that.  It resulted in a lot of complexity that each driver
>> >> needs to implement correctly which is why I started looking for a
>> >> different way to go about it.
>> >
>> > No, the bus that wants this just has to do it, not the drivers
>> > themselves, right?
>>
>> It's not about the bus_type, and there is nothing that the bus can do
>> to solve this problem because it the dependencies are completely
>> orthogonal to the bus.  ie. what does an i2c bus know about the audio
>> path to a codec?  The problem must be solved at the driver scope.
>
> Ok, let's look at your next implementation and see how it goes.

Okay, thanks. I'll get it posted soon.

g.
--
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/

\
 
 \ /
  Last update: 2011-07-05 19:39    [W:0.616 / U:0.396 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site