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HID: make it possible to force hid-core claim the device 

Introduce 'hid_ignore_special_drivers' module parameter that makes hid-core
claim the device even if it's listed in hid_have_special_driver[]. This
is useful mostly for debugging purposes and specialized initrds, where
all the hid drivers are not avaiable.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Jiri Kosina 2012-03-09 13:55:43 +01:00
parent a786e83cb0
commit 6b1968d5b6
1 changed files with 6 additions and 2 deletions
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8
drivers/hid/hid-core.c
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@ -4,7 +4,7 @@
* Copyright (c) 1999 Andreas Gal
* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
* Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
* Copyright (c) 2006-2010 Jiri Kosina
* Copyright (c) 2006-2012 Jiri Kosina
*/
/*
@ -50,6 +50,10 @@ module_param_named(debug, hid_debug, int, 0600);
MODULE_PARM_DESC(debug, "toggle HID debugging messages");
EXPORT_SYMBOL_GPL(hid_debug);
static int hid_ignore_special_drivers = 0;
module_param_named(ignore_special_drivers, hid_ignore_special_drivers, int, 0600);
MODULE_PARM_DESC(debug, "Ignore any special drivers and handle all devices by generic driver");
/*
* Register a new report for a device.
*/
@ -1678,7 +1682,7 @@ static int hid_bus_match(struct device *dev, struct device_driver *drv)
return 0;
/* generic wants all that don't have specialized driver */
if (!strncmp(hdrv->name, "generic-", 8))
if (!strncmp(hdrv->name, "generic-", 8) && !hid_ignore_special_drivers)
return !hid_match_id(hdev, hid_have_special_driver);
return 1;