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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>
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@ -2661,9 +2661,10 @@ int hid_add_device(struct hid_device *hdev)
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/*
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* Scan generic devices for group information
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*/
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if (hid_ignore_special_drivers ||
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(!hdev->group &&
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!hid_match_id(hdev, hid_have_special_driver))) {
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if (hid_ignore_special_drivers) {
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hdev->group = HID_GROUP_GENERIC;
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} else if (!hdev->group &&
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!hid_match_id(hdev, hid_have_special_driver)) {
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ret = hid_scan_report(hdev);
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if (ret)
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hid_warn(hdev, "bad device descriptor (%d)\n", ret);
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