From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E21D933993; Sat, 12 Sep 2026 17:07:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789232863; cv=none; b=CBLchlb0grve+d+nEecsoIOeSXeIuzEb5PgZfMrf6CjdxbC/OTwCBqVFzpUldjPT2uwHcIToEgLSdeqdJyOlwd8jQqRVs/k6MEMMxXq6K6ZZ3lJpmFZzY65KoeWyYRNlTz3M1i41ZFsnCbMUuLhY7z76TifkKPC7fKAGdUF7g4U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789232863; c=relaxed/simple; bh=0ncR02q1469umx3NzgZGX2zoCsA/x7qFbC2yDjrE+Hc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qT0FCd1CTfJI1LNjCfcWbUpy7389gxJeEdCKmDGJK0XSUmd466Gq2KVYqYKXcFXhBYaVJFK/XGt9dukCggp0YW4VviaxNddA6LwZsWJ/MDadqOM/C52Xh+JwCwtNO4AOTBncwXmdjc/IAz/RPQK6o+otfWBCyY9PHVpD+QZkdvg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Cw0qwuGY; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Cw0qwuGY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 852961F000FF; Sat, 12 Sep 2026 17:07:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789232861; bh=teYC/W7a+qLm7F6h3GFGXPlk7EQ32kGXrWvbQj6M8Yw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Cw0qwuGYLbZV6+798edBdBR0Sr5ocgzqisM87Ga+79W1gzJB5IAVAHjoO0lJt+zFv uhXLBkQsAMdXdto0Sk7LNvUVigmz90W05uEkFmc+JU64S0QXwcgntnXKiTMrJhu7ZT 2NjtoFuqLuqkJNCudxa5PeCPwE8TFezO8ocjYzz4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Guangshuo Li , Luiz Augusto von Dentz Subject: [PATCH 5.15 097/935] Bluetooth: hci_h5: fix usage_count leak when autosuspend_delay is negative Date: Sat, 12 Sep 2026 08:52:07 +0200 Message-ID: <20260912065529.047522503@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065526.833703348@linuxfoundation.org> References: <20260912065526.833703348@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Guangshuo Li commit 853a92b97ca547a7ddd9790ff90651b2fd943498 upstream. h5_btrtl_open() calls pm_runtime_use_autosuspend(), but h5_btrtl_close() does not call the matching pm_runtime_dont_use_autosuspend() when tearing down runtime PM. If the autosuspend delay is set to a negative value while autosuspend is enabled, the runtime PM core increments usage_count to prevent runtime suspend. Without calling pm_runtime_dont_use_autosuspend() during driver teardown, this reference is not dropped and usage_count remains unbalanced. Add the missing pm_runtime_dont_use_autosuspend() call before disabling runtime PM. This issue was found by manual code inspection. Fixes: d9dd833cf6d2 ("Bluetooth: hci_h5: Add runtime suspend") Cc: stable@vger.kernel.org Signed-off-by: Guangshuo Li Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Greg Kroah-Hartman --- drivers/bluetooth/hci_h5.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/bluetooth/hci_h5.c +++ b/drivers/bluetooth/hci_h5.c @@ -981,8 +981,10 @@ static void h5_btrtl_open(struct h5 *h5) static void h5_btrtl_close(struct h5 *h5) { - if (!test_bit(H5_WAKEUP_DISABLE, &h5->flags)) + if (!test_bit(H5_WAKEUP_DISABLE, &h5->flags)) { + pm_runtime_dont_use_autosuspend(&h5->hu->serdev->dev); pm_runtime_disable(&h5->hu->serdev->dev); + } gpiod_set_value_cansleep(h5->device_wake_gpio, 0); gpiod_set_value_cansleep(h5->enable_gpio, 0);