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 659B23438BE; Sat, 12 Sep 2026 15:31:50 +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=1789227111; cv=none; b=izFoUFJZn7OvyfjcpW39Zv1jXvu7zS+M8Lmhi4VeWcf9gzio+tQlmMYggj3cHqbN5tqqYD+Zs7o00gMt0EDrAz2Me0LrBqteoIR5fMhlniQDP7B2RTF4jouFqdvaOkpBsUq/pdp2vPBpSFne6OqafYMMWvTX+FykRj/zEHgcJoY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789227111; c=relaxed/simple; bh=Fu+pI9TB9DugAqHgG16pu6SFCTzx730QqggEBfNDdFw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LJpLrFvAlJwguxkmHkjxSGLj+GgRXVU5fUMUjXoyvyfykBpbLwdPFYdQCb7S4ryaDEEGUs3dP0RX4SmwtKNQ9xn14BfK/PSOSxZbSXCHUeEhsQw/M5HrsSaLxtsZemFpca5mqVpCUMceAN/3mNowWtcxzQAyrc7YzxLJ9QWTt1Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=heAEGBCF; 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="heAEGBCF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 673D11F000FF; Sat, 12 Sep 2026 15:31:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789227110; bh=UOX/82ytrS/Xeur5L0fxfU707lDW/jw4PBYg7lcSGrc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=heAEGBCFdvm3dloY2bIbfxB1941UOT1fkCVjeQbJJp8kGeg/nzmPnfW96w4a4eUTm BN0+aII942bE5PSud9jP5ZSELiNRm+x9GHiZIU/H1wh0h2qSNr4UoFjyjCAvD2e/Fp k/PsTU1kD7ktVEtHZv75hQ7p6eW5U6uSXEAnVbuA= 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 6.1 0115/1191] Bluetooth: hci_h5: fix usage_count leak when autosuspend_delay is negative Date: Sat, 12 Sep 2026 08:47:23 +0200 Message-ID: <20260912065550.772789944@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065548.086904252@linuxfoundation.org> References: <20260912065548.086904252@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 6.1-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 @@ -983,8 +983,10 @@ 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);