Received-SPF: pass (google.com: domain of linux-bluetooth+bounces-2666-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.48.161 as permitted sender) client-ip=147.75.48.161;
From: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
To: linux-bluetooth@vger.kernel.org
Subject: [PATCH BlueZ v1] input/device: Fix not handling IdleTimeout when uhid is in use
Date: Wed, 20 Mar 2024 11:45:18 +0000
Message-ID: <20240320114518.751185-1-luiz.dentz@gmail.com>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

When uhid is in use IdleTimeout was not taking any effect, this also
attempt to force the destroy the input device node to make it useful
for users that don't want to keep the input node forever.

Fixes: https://github.com/bluez/bluez/issues/777
---
 profiles/input/device.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/profiles/input/device.c b/profiles/input/device.c
index 1b28cdc17..3467ff79f 100644
--- a/profiles/input/device.c
+++ b/profiles/input/device.c
@@ -77,6 +77,7 @@ struct input_device {
 	unsigned int		report_req_timer;
 	uint32_t		report_rsp_id;
 	bool			virtual_cable_unplug;
+	unsigned int		idle_timer;
 };
 
 static int idle_timeout = 0;
@@ -139,6 +140,9 @@ static void input_device_free(struct input_device *idev)
 		g_free(idev->req);
 	}
 
+	if (idev->idle_timer)
+		timeout_remove(idev->idle_timer);
+
 	if (idev->reconnect_timer > 0)
 		timeout_remove(idev->reconnect_timer);
 
@@ -156,6 +160,29 @@ static void virtual_cable_unplug(struct input_device *idev)
 	idev->virtual_cable_unplug = false;
 }
 
+static bool input_device_idle_timeout(gpointer user_data)
+{
+	struct input_device *idev = user_data;
+
+	idev->idle_timer = 0;
+
+	DBG("path=%s", idev->path);
+
+	if (connection_disconnect(idev, 0) == -ENOTCONN) {
+		/* Force UHID_DESTROY on idle */
+		if (idev->uhid)
+			uhid_disconnect(idev, true);
+	}
+}
+
+static void input_device_idle_reset(struct input_device *idev)
+{
+	timeout_remove(idev->idle_timer);
+	idev->idle_timer = timeout_add_seconds(idle_timeout,
+					input_device_idle_timeout, idev,
+					NULL);
+}
+
 static bool hidp_send_message(GIOChannel *chan, uint8_t hdr,
 					const uint8_t *data, size_t size)
 {
@@ -191,6 +218,8 @@ static bool hidp_send_message(GIOChannel *chan, uint8_t hdr,
 		return false;
 	}
 
+	input_device_idle_reset(idev);
+
 	return true;
 }
 
@@ -297,6 +326,8 @@ static bool hidp_recv_intr_data(GIOChannel *chan, struct input_device *idev)
 		return true;
 	}
 
+	input_device_idle_reset(idev);
+
 	hdr = data[0];
 	if (hdr != (HIDP_TRANS_DATA | HIDP_DATA_RTYPE_INPUT)) {
 		DBG("unsupported HIDP protocol header 0x%02x", hdr);
@@ -520,6 +551,8 @@ static bool hidp_recv_ctrl_message(GIOChannel *chan, struct input_device *idev)
 		return true;
 	}
 
+	input_device_idle_reset(idev);
+
 	hdr = data[0];
 	type = hdr & HIDP_HEADER_TRANS_MASK;
 	param = hdr & HIDP_HEADER_PARAM_MASK;
-- 
2.44.0