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 B16B14078C0; Fri, 4 Sep 2026 05:20:16 +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=1788499217; cv=none; b=cbEGUNuzADNK9b2pv8GgOvcYI2VPHbNOcSaekhBilJCaLGKFCxHyilqY+qAZMvieFsCufZnYvg+hs/y9+uLueTUpjpuH64q75u9JnOm1YMy/qOggl08TfnCgYTLTS0oJ08uweuDShqtIc1XRtG7CrirZQstsIQJfQTf9FYlej5E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788499217; c=relaxed/simple; bh=7rm3eOvPvZOgG0ZmWl36pVJ1k1bl6docXecKPWsI2/k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qKlOl2CEuVK+25O7NjUIVuQtrpm3Z1yoLo+WUWH/Le9K9ipxHT3ASYcIV93EePcmWbNc3frNKhMgyxUQA5kW88LHp28OM5dfcba+uvRRrA9HKsJwh8m8ks2TcZvxFOreQ0rPgnnhZQa26BGhYjnB9vQL8cVmoizdIdcvyYIGnj0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=axS4UHbQ; 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="axS4UHbQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0BE7A1F00A3D; Fri, 4 Sep 2026 05:20:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788499216; bh=sOnNf20fprVCwbXIAlqJlLJpt9hH8W0H/P05uIKxIvk=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=axS4UHbQmAiIiR0bcElOFIrI5kBFhlpI8N7VtWBC+9SxixdheVYF0sQpUZqWMM8nI xNK1AVZ5WEZ4T4Mkngn2aW3Pbs9VMs8RhygM7dHU0ZKN/duvFU9sldL66wVFq2yxMY jtZwlHBxuYoWLM/3tXrn3nZOtulCFaqthNB1rI/o= 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 7.2 338/713] Bluetooth: hci_bcm: fix usage_count leak when autosuspend_delay is negative Date: Fri, 4 Sep 2026 06:55:06 +0200 Message-ID: <20260904045811.404225515@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260904045803.810145556@linuxfoundation.org> References: <20260904045803.810145556@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 7.2-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 @@ -547,6 +547,7 @@ 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); }