From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793211695; b=eEF6S/rkJzKVDSibeNMEwWVEYXM9QnZr1YVrZfJBt2bBqWwaXWqPaQO3n8jabtIjtJNi T/Fr0940RnNCJ+Q/7lqexn5e774GEz9pt0koQ48nFn5V0K3Y8grWUOp21w3zJNBsaULoy apt08Y20yH0oJGoIFZQGYe0+TLMY+aQY5V1IR794qa1ItB38uEgREkXTG2Gpu3wwIw2op maAAL2C9y06C/WFtbP4+Ncq5Yayc9R4FGVJ3Tuko678SUNKEFbZpW5bABsR6fh25XiDNu KBClbsjpBM0yOVlchwP8XTS5Xi044tFwtpGckA5tPd+gTd6xFznKuUxwanZ9Z0W9f6A== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793211695; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=1D2S10lfIVjOV22EJSs0PkbbGKplHuUQOwNELvZ9igI=; b=at/t/QhkJxsEtWYNUDvFHIccKuZGBdBO7B+TlXnupDtKE82mPdwogXaUod+YSxkY2XM0 xmpNcz0j+NL0JYQgk0a+AbLlN9ZC0K1bEwhQfiOGrcvoNsRQRuyyOgRQ5HroY5Yr6+GlD xBWfQhH84Iq1+Tx6iH62GBxo3sf9kon+Vm++2Ope442dbjyVtFOoYSiriisTwCtElhYle tVklm9LZd2MLrj+x4ZkIADU7WSubhWRAkoG1RBhuTS9dagowsc47Eq3xXIEB4Hn6pAnF+ 6whrinwWcSQ7VSlXTRs3KLRsZm6tfZGbjhNQt5N4G/Hnmn7J3RIftXkaF/RBBMzQi3Q== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=Sqj8YLU8; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0CD18606A323; Wed, 28 Oct 2026 18:21:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=Sqj8YLU8 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5B6BE1F01828; Wed, 28 Oct 2026 18:21:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793211694; bh=1D2S10lfIVjOV22EJSs0PkbbGKplHuUQOwNELvZ9igI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Sqj8YLU8obptVn6VIHDK7chZTzQnSn2eJoUpA5kA06yTkOLos0g5GbWpiw+tatA1o 17PCyCt9qKjaykjbkIAyZ+jM5TZoOWjqZeovruYLWHTcdnKM+Ie/VlRKdA2hMDIKxZ EjJDxLH3UkURLuIoyttOpWmwuPQwAc4NFrBie9cY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Vicki Pfau , Jiri Kosina , Lee Jones , Sasha Levin Subject: [PATCH 5.15 422/571] HID: steam: Refactor registration Date: Wed, 28 Oct 2026 17:59:29 +0100 Message-ID: <20261028170018.028405609@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261028170008.009143722@linuxfoundation.org> References: <20261028170008.009143722@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Vicki Pfau [ Upstream commit 6f9b740c31ba7e061b2ebb330d9a3d63f1358f29 ] This refactors and simplifies the registration/unregistration flow. Since we now only perform registration when the client isn't opened anymore, the logic for handling that can be removed, and the rest of the function streamlined. We also remove the previous assumption that we have a serial number to show we're registered, replacing it with a single purpose boolean. In a previous refactor the code for unregistering a battery if later registration steps failed was accidentally left out. As a result, a lingering power_supply object could get left over after the steam object was torn down. This is also fixed here. Signed-off-by: Vicki Pfau Signed-off-by: Jiri Kosina [Lee: Omit sensors, steam_get_attributes(), rumble_work, coalesce_rumble_work and mode_switch changes as e133dc99fc07, a0fbd9437d7d and 1d4549fd1115 are not present] Signed-off-by: Lee Jones Signed-off-by: Sasha Levin --- drivers/hid/hid-steam.c | 70 ++++++++++++++++++----------------------- 1 file changed, 31 insertions(+), 39 deletions(-) diff --git a/drivers/hid/hid-steam.c b/drivers/hid/hid-steam.c index 628e4ef72b81b..544d45f3fc6b5 100644 --- a/drivers/hid/hid-steam.c +++ b/drivers/hid/hid-steam.c @@ -119,6 +119,7 @@ struct steam_device { unsigned long quirks; struct work_struct work_connect; bool connected; + bool registered; char serial_no[STEAM_SERIAL_LEN + 1]; struct power_supply_desc battery_desc; struct power_supply __rcu *battery; @@ -511,9 +512,6 @@ static void steam_battery_unregister(struct steam_device *steam) static int steam_register(struct steam_device *steam) { int ret; - unsigned long client_opened; - unsigned long flags; - bool do_add; /* * This function can be called several times in a row with the @@ -521,59 +519,53 @@ static int steam_register(struct steam_device *steam) * another client send a get_connection_status command, for example. * The battery and serial number are set just once per device. */ - if (!steam->serial_no[0]) { - /* - * Unlikely, but getting the serial could fail, and it is not so - * important, so make up a serial number and go on. - */ - mutex_lock(&steam->mutex); - if (steam_get_serial(steam) < 0) - strlcpy(steam->serial_no, "XXXXXXXXXX", - sizeof(steam->serial_no)); - mutex_unlock(&steam->mutex); - - hid_info(steam->hdev, "Steam Controller '%s' connected", - steam->serial_no); + if (steam->registered) + return 0; - /* ignore battery errors, we can live without it */ - if (steam->quirks & STEAM_QUIRK_WIRELESS) - steam_battery_register(steam); + /* + * Unlikely, but getting the serial could fail, and it is not so + * important, so make up a serial number and go on. + */ + mutex_lock(&steam->mutex); + if (steam_get_serial(steam) < 0 || !steam->serial_no[0]) + strlcpy(steam->serial_no, "XXXXXXXXXX", + sizeof(steam->serial_no)); + mutex_unlock(&steam->mutex); - do_add = true; - } + hid_info(steam->hdev, "Steam Controller '%s' connected", + steam->serial_no); - spin_lock_irqsave(&steam->lock, flags); - client_opened = steam->client_opened; - spin_unlock_irqrestore(&steam->lock, flags); + /* ignore battery errors, we can live without it */ + if (steam->quirks & STEAM_QUIRK_WIRELESS) + steam_battery_register(steam); - if (!client_opened) { - mutex_lock(&steam->mutex); - steam_set_lizard_mode(steam, lizard_mode); - mutex_unlock(&steam->mutex); - ret = steam_input_register(steam); - if (ret != 0) - goto steam_register_input_fail; - } + mutex_lock(&steam->mutex); + steam_set_lizard_mode(steam, lizard_mode); + mutex_unlock(&steam->mutex); + ret = steam_input_register(steam); + if (ret != 0) + goto steam_register_input_fail; - if (do_add) { - mutex_lock(&steam_devices_lock); - if (list_empty(&steam->list)) - list_add(&steam->list, &steam_devices); - mutex_unlock(&steam_devices_lock); - } + steam->registered = true; + mutex_lock(&steam_devices_lock); + if (list_empty(&steam->list)) + list_add(&steam->list, &steam_devices); + mutex_unlock(&steam_devices_lock); return 0; steam_register_input_fail: + steam_battery_unregister(steam); return ret; } static void steam_unregister(struct steam_device *steam) { - if (!steam->serial_no[0]) + if (!steam->registered) return; hid_info(steam->hdev, "Steam Controller '%s' disconnected", steam->serial_no); + steam->registered = false; steam_battery_unregister(steam); steam_input_unregister(steam); mutex_lock(&steam_devices_lock); -- 2.53.0