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HID: fix hid_ignore_special_drivers module parameter 

hid_ignore_special_drivers works fine until hid_scan_report autodetects and
reassign devices (for hid-multitouch, hid-microsoft and hid-rmi).

Simplify the handling of the parameter: if it is there, use hid-generic, no
matter what, and if not, scan the device or rely on the hid_have_special_driver
table.

This was detected while trying to disable hid-multitouch on a Surface Pro cover
which prevented to use the keyboard.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
CC: stable@vger.kernel.org
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Benjamin Tissoires 2016-02-12 17:10:37 +01:00 committed by Jiri Kosina
parent 5d74325a22
commit 4392bf3333
1 changed files with 4 additions and 3 deletions
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7
drivers/hid/hid-core.c
View File

@ -2661,9 +2661,10 @@ int hid_add_device(struct hid_device *hdev)
/*
* Scan generic devices for group information
*/
if (hid_ignore_special_drivers ||
(!hdev->group &&
!hid_match_id(hdev, hid_have_special_driver))) {
if (hid_ignore_special_drivers) {
hdev->group = HID_GROUP_GENERIC;
} else if (!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);