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 207E647DFBF; Sat, 12 Sep 2026 13:36:33 +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=1789220194; cv=none; b=IYDhKYiTDa05+bvSGFaxq/BgQyPnjIKruiRp+RH/kTi1g96XhXMXjDkcRDzyS0xgYUOjno6t391QKZN1TSjsqLf05b2joAq4XseBuSkpTtrUHogd2Lah/xNRIPngiFjF9RuNe1HGFUHM9MJfK2M5rLq+4ImV9GWPs2JdbUtuZGY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789220194; c=relaxed/simple; bh=Un85N9SitUQ+h4A1k2Zqcdf8kbqsrEnxek3Lo2eAF74=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YQQyG59CV6JgAUXgzokojJ46M539Wo5+2d0+/wnLghc3fZAlaWQrkwuJ4iHjSo0blfCJw2QtDDuJ02SHpaFBs0U3XYYFqUUwu88CfJAupgNzsRKntU09GvGFGM0q+3jDfbowvpiDCRE0PjsSukMrJRjqxvCdxZsDJjUc0nrfMuw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=kilqbJas; 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="kilqbJas" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E8DB51F000FF; Sat, 12 Sep 2026 13:36:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789220193; bh=JfbaOe0BJcZxRd1bCd3fQIG9zqRkK/y/vm9hw0UhqVU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=kilqbJasGTd3UIRLMAFrXO0IVBa+t34Y7MAddJg+OjQuZ2CaxW/1bLEsx82qOOFzo jbhFaI9sw6SJ66B54uFKGgTXT4/wv0q3uamWX+yd/EQIuXyR1N3yD5XxYWjonk45ns ReQO2gBTWdMYJovJr27k3YiQzXsekdYfjuZRqZyA= 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 6.6 0128/1424] Bluetooth: hci_bcm: fix usage_count leak when autosuspend_delay is negative Date: Sat, 12 Sep 2026 08:42:40 +0200 Message-ID: <20260912065610.165776943@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065607.279695368@linuxfoundation.org> References: <20260912065607.279695368@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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Guangshuo Li commit dc6b7c771a963e20aedf4a21ffa22543b9837ba8 upstream. bcm_request_irq() calls pm_runtime_use_autosuspend(), but bcm_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: e88ab30d3669 ("Bluetooth: hci_bcm: Add suspend/resume runtime PM functions") 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_bcm.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/bluetooth/hci_bcm.c +++ b/drivers/bluetooth/hci_bcm.c @@ -548,6 +548,7 @@ static int bcm_close(struct hci_uart *hu if (IS_ENABLED(CONFIG_PM) && bdev->irq_acquired) { devm_free_irq(bdev->dev, bdev->irq, bdev); device_init_wakeup(bdev->dev, false); + pm_runtime_dont_use_autosuspend(bdev->dev); pm_runtime_disable(bdev->dev); }