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 147A03815E7; Sat, 12 Sep 2026 19:26:20 +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=1789241181; cv=none; b=N5rg/VdLzTv5yBOpS32jvVE9gK6bsE+CBN1UAZZqJ92Wiij8K8uixFeujmQDjrRm7eUQ9xGwXCy7GmOCM+YAyk8VMEQrthyldAxvxcWkwoc1Fa0DVuWB3KNDyAaT6Vi2RYKPwxBQLa8DeJOwRa5SPySR/y34w0AL2rWdP6tKGy0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789241181; c=relaxed/simple; bh=H8GcFA6Q1oZyPcLhSqJX/lRT+xaa3/OXwh6yupebC/s=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Qz4dCceZTbqAZn+R3fC25/5L6EFFUI7xL1kaX3zjUEIjQzzUeZiPiNb3wpl8LbdDEZITrc/RKpWiQ+ZUjZUV3bRJzFPc1bGV5X6hpAMeKDJZp5VX0DXQxrRpa+JlyhWikEIZSF8bYfR6sDWUHIOzzdK0isguwZe4IA9UM7bkw8I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=1wiFIefo; 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="1wiFIefo" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B5AD11F000FF; Sat, 12 Sep 2026 19:26:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789241179; bh=BkH42djEjzHmjSUClG7V7SNjA/wHSqEu4fzp/EWRlCg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=1wiFIefowaFyDVwBIisMTzBbNq4bYFQcXm0CNwZzjN4EOfQUCO+viKl66eIlCy/9s Kd2bpE+VF6VQwI+/sTTU40ObfXKR2vj+OWpo0EsB6e3514z0+ApXZGDwSVb51wtw6v a9714G5pELHhkO9nU8Xw+3UfrQoJx8Ipnugnnujg= 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 5.10 083/798] Bluetooth: hci_bcm: fix usage_count leak when autosuspend_delay is negative Date: Sat, 12 Sep 2026 08:55:11 +0200 Message-ID: <20260912065518.863391116@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065516.948645775@linuxfoundation.org> References: <20260912065516.948645775@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.10-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 @@ -520,6 +520,7 @@ 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); }