From 9578f41aeaee5010384f4f8484da1566e2ce4901 Mon Sep 17 00:00:00 2001 From: Benjamin Tissoires Date: Tue, 30 Sep 2014 13:18:24 -0400 Subject: [PATCH] HID: core: do not scan reports if the group is already set 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 Signed-off-by: Jiri Kosina --- drivers/hid/hid-core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c index aef7c56ca5e7..946540e1764d 100644 --- a/drivers/hid/hid-core.c +++ b/drivers/hid/hid-core.c @@ -2535,7 +2535,8 @@ 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); -- GitLab