Commit 15d4c430 authored Sep 30, 2014 by Benjamin Tissoires Committed by Sasha Levin Apr 12, 2016

HID: core: do not scan reports if the group is already set



[ Upstream commit 9578f41aeaee5010384f4f8484da1566e2ce4901 ]

This allows the transport layer (I have in mind hid-logitech-dj and uhid)
to set the group before it is added to the hid bus. This way, it can
bypass the hid_scan_report() call, and choose in advance which driver
will handle the newly created hid device.

Signed-off-by: Benjamin Tisssoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

parent 8f021777

drivers/hid/hid-core.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -2554,7 +2554,8 @@ int hid_add_device(struct hid_device *hdev)
		* Scan generic devices for group information
		*/
		if (hid_ignore_special_drivers \|\|
		!hid_match_id(hdev, hid_have_special_driver)) {
		(!hdev->group &&
		!hid_match_id(hdev, hid_have_special_driver))) {
		ret = hid_scan_report(hdev);
		if (ret)
		hid_warn(hdev, "bad device descriptor (%d)\n", ret);