lkml.org 
[lkml]   [2006]   [Oct]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    SubjectRe: [linux-usb-devel] [PATCH] usb/hid: The HID Simple Driver Interface 0.3.2 (core)
    Date
    On Monday 09 October 2006 18:53, Anssi Hannula wrote:
    > Dmitry Torokhov wrote:
    > > On Sunday 08 October 2006 14:51, Anssi Hannula wrote:
    > >> (I didn't get Dmitry's original mail, so replying here)
    > >>
    > >> raise.sail@gmail.com wrote:
    > >>> Dmitry Torokhov wrote:
    > >>>> Then there is issue with automatic loading of these sub-drivers. How
    > >>>> do they get loaded? Or we force everything to be built-in making HID
    > >>>> module very fat (like psmouse got pretty fat, but with HID prtential
    > >>>> for it to get very fat is much bigger).
    > >>>>
    > >>>> The better way would be to split hid-input into a library module that
    > >>>> parses hid usages and reports and is shared between device-specific
    > >>>> modules that are "real" drivers (usb-drivers, not hid-sub-drivers).
    > >> One possibility is to do that with symbol_request() and friends. That
    > >> would not be pretty though, imho.
    > >>
    > >> DVB subsystem uses that currently to load frontend modules dynamically,
    > >> see dvb_attach() and dvb_frontend_detach() in
    > >> drivers/media/dvb/dvb-core/dvbdev.h and
    > >> drivers/media/dvb/dvb-core/dvb_frontend.c.
    > >>
    > >
    > > Unfortunately this does not quite work when hid is built-in and the rest
    > > are modules :(
    > >
    >
    > How so? I see nothing obvious.
    >

    If hid (and hcd) is compiled in it will try binging to devices before
    userspace is up and symbol_request will not work. You could try
    playing with initramfs but it is kind of a hassle.

    --
    Dmitry
    -
    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: 2006-10-10 07:19    [W:0.028 / U:0.484 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site