From patchwork Thu Nov 10 01:50:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "lihuisong (C)" X-Patchwork-Id: 13038235 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 242B0C43217 for ; Thu, 10 Nov 2022 01:52:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231966AbiKJBww (ORCPT ); Wed, 9 Nov 2022 20:52:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47910 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232142AbiKJBwu (ORCPT ); Wed, 9 Nov 2022 20:52:50 -0500 Received: from szxga03-in.huawei.com (szxga03-in.huawei.com [45.249.212.189]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 136ADBC85; Wed, 9 Nov 2022 17:52:50 -0800 (PST) Received: from dggemv703-chm.china.huawei.com (unknown [172.30.72.57]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4N74XB2WGqzJnZL; Thu, 10 Nov 2022 09:49:46 +0800 (CST) Received: from kwepemm600004.china.huawei.com (7.193.23.242) by dggemv703-chm.china.huawei.com (10.3.19.46) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Thu, 10 Nov 2022 09:52:48 +0800 Received: from localhost.localdomain (10.28.79.22) by kwepemm600004.china.huawei.com (7.193.23.242) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Thu, 10 Nov 2022 09:52:47 +0800 From: Huisong Li To: , CC: , , , , , , , , , , , Subject: [PATCH 3/3] mailbox: pcc: fix 'pcc_chan_count' when fail to initialize PCC Date: Thu, 10 Nov 2022 09:50:34 +0800 Message-ID: <20221110015034.7943-4-lihuisong@huawei.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20221110015034.7943-1-lihuisong@huawei.com> References: <20221110015034.7943-1-lihuisong@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.28.79.22] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To kwepemm600004.china.huawei.com (7.193.23.242) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Currently, 'pcc_chan_count' is a non-zero value if PCC subspaces are parsed successfully and subsequent processes is failure during initializing PCC process. This may cause that pcc_mbox_request_channel() can still be executed successfully , which will misleads the caller that this channel is available. Fixes: ce028702ddbc ("mailbox: pcc: Move bulk of PCCT parsing into pcc_mbox_probe") Signed-off-by: Huisong Li --- drivers/mailbox/pcc.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c index 7cee37dd3b73..47d70c5884e3 100644 --- a/drivers/mailbox/pcc.c +++ b/drivers/mailbox/pcc.c @@ -294,6 +294,7 @@ pcc_mbox_request_channel(struct mbox_client *cl, int subspace_id) pr_err("Channel not found for idx: %d\n", subspace_id); return ERR_PTR(-EBUSY); } + dev = chan->mbox->dev; spin_lock_irqsave(&chan->lock, flags); @@ -735,7 +736,8 @@ static int __init pcc_init(void) if (ret) { pr_debug("ACPI PCC probe failed.\n"); - return -ENODEV; + ret = -ENODEV; + goto out; } pcc_pdev = platform_create_bundle(&pcc_mbox_driver, @@ -743,10 +745,13 @@ static int __init pcc_init(void) if (IS_ERR(pcc_pdev)) { pr_debug("Err creating PCC platform bundle\n"); - return PTR_ERR(pcc_pdev); + ret = PTR_ERR(pcc_pdev); + goto out; } - return 0; +out: + pcc_chan_count = 0; + return ret; } /*