[PATCH BlueZ v2 1/2] Revert "input/hog: Remove HID device after HoG device disconnects"

From: Sonny Sasaka <sonnysasaka@chromium.org>
To: linux-bluetooth@vger.kernel.org
Cc: Sonny Sasaka <sonnysasaka@chromium.org>,
	Alain Michaud <alainm@chromium.org>
Subject: [PATCH BlueZ v2 1/2] Revert "input/hog: Remove HID device after HoG device disconnects"
Date: Fri, 11 Dec 2020 15:30:46 -0800	[thread overview]
Message-ID: <20201211233047.108658-1-sonnysasaka@chromium.org> (raw)

This reverts commit d6cafa1f0c3ea1989f8a580e52f418b0998a3552.

In commit d6cafa1f0c3e ("input/hog: Remove HID device after HoG device
disconnects"), the bt_hog structure is destroyed in order to fix a bug
where the UHID connection is not destroyed. This fix has the cost of
increasing reconnection time because every reconnection would need to
re-read the report map again. An improvement to this fix is, instead of
removing the bt_hog structure, we can just destroy the UHID with
UHID_DESTROY event and use the existing bt_hog structure to keep the
cache of the report map to avoid re-reading the report map at
reconnection.

Reviewed-by: Alain Michaud <alainm@chromium.org>

---
 profiles/input/hog.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/profiles/input/hog.c b/profiles/input/hog.c
index 91de4c70f..d50b82321 100644
--- a/profiles/input/hog.c
+++ b/profiles/input/hog.c
@@ -207,8 +207,6 @@ static int hog_disconnect(struct btd_service *service)
 	struct hog_device *dev = btd_service_get_user_data(service);
 
 	bt_hog_detach(dev->hog);
-	bt_hog_unref(dev->hog);
-	dev->hog = NULL;
 
 	btd_service_disconnecting_complete(service, 0);
 
-- 
2.26.2

