linux-kernel - Re: [linux-usb-devel] [PATCH] usb/hid: The HID Simple Driver Interface 0.3.2 (core)

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Message-ID: <452948AD.8030600@gmail.com>
Date:	Sun, 08 Oct 2006 21:51:25 +0300
From:	Anssi Hannula <anssi.hannula@...il.com>
To:	"raise.sail@...il.com" <raise.sail@...il.com>
CC:	Dmitry Torokhov <dmitry.torokhov@...il.com>, greg <greg@...ah.com>,
	Randy Dunlap <rdunlap@...otime.net>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-usb-devel <linux-usb-devel@...ts.sourceforge.net>
Subject: Re: [linux-usb-devel] [PATCH] usb/hid: The HID Simple Driver	Interface
 0.3.2 (core)

(I didn't get Dmitry's original mail, so replying here)

raise.sail@...il.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.

-- 
Anssi Hannula

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