linux-kernel - [PATCH 4.19 40/55] HID: steam: Fix input device disappearing

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Message-Id: <20200130183615.719491608@linuxfoundation.org>
Date:   Thu, 30 Jan 2020 19:39:21 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Rodrigo Rivas Costa <rodrigorivascosta@...il.com>,
        Jiri Kosina <jkosina@...e.cz>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 40/55] HID: steam: Fix input device disappearing

From: Rodrigo Rivas Costa <rodrigorivascosta@...il.com>

[ Upstream commit 20eee6e5af35d9586774e80b6e0b1850e7cc9899 ]

The `connected` value for wired devices was not properly initialized,
it must be set to `true` upon creation, because wired devices do not
generate connection events.

When a raw client (the Steam Client) uses the device, the input device
is destroyed. Then, when the raw client finishes, it must be recreated.
But since the `connected` variable was false this never happended.

Signed-off-by: Rodrigo Rivas Costa <rodrigorivascosta@...il.com>
Signed-off-by: Jiri Kosina <jkosina@...e.cz>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/hid/hid-steam.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/hid/hid-steam.c b/drivers/hid/hid-steam.c
index 8dae0f9b819e0..6286204d4c560 100644
--- a/drivers/hid/hid-steam.c
+++ b/drivers/hid/hid-steam.c
@@ -768,8 +768,12 @@ static int steam_probe(struct hid_device *hdev,
 
 	if (steam->quirks & STEAM_QUIRK_WIRELESS) {
 		hid_info(hdev, "Steam wireless receiver connected");
+		/* If using a wireless adaptor ask for connection status */
+		steam->connected = false;
 		steam_request_conn_status(steam);
 	} else {
+		/* A wired connection is always present */
+		steam->connected = true;
 		ret = steam_register(steam);
 		if (ret) {
 			hid_err(hdev,
-- 
2.20.1