From patchwork Thu Dec 10 09:55:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Kleine-Budde X-Patchwork-Id: 342685 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5826AC4361B for ; Thu, 10 Dec 2020 09:57:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1797323D3C for ; Thu, 10 Dec 2020 09:57:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730340AbgLJJ5g (ORCPT ); Thu, 10 Dec 2020 04:57:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46700 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728476AbgLJJ4e (ORCPT ); Thu, 10 Dec 2020 04:56:34 -0500 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D4DEAC061282 for ; Thu, 10 Dec 2020 01:55:18 -0800 (PST) Received: from gallifrey.ext.pengutronix.de ([2001:67c:670:201:5054:ff:fe8d:eefb] helo=bjornoya.blackshift.org) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1knIfN-0000zF-Ab for netdev@vger.kernel.org; Thu, 10 Dec 2020 10:55:17 +0100 Received: from dspam.blackshift.org (localhost [127.0.0.1]) by bjornoya.blackshift.org (Postfix) with SMTP id 716A65AA1C4 for ; Thu, 10 Dec 2020 09:55:14 +0000 (UTC) Received: from hardanger.blackshift.org (unknown [172.20.34.65]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by bjornoya.blackshift.org (Postfix) with ESMTPS id DAFFE5AA19D; Thu, 10 Dec 2020 09:55:09 +0000 (UTC) Received: from blackshift.org (localhost [::1]) by hardanger.blackshift.org (OpenSMTPD) with ESMTP id a12aba87; Thu, 10 Dec 2020 09:55:08 +0000 (UTC) From: Marc Kleine-Budde To: netdev@vger.kernel.org Cc: davem@davemloft.net, kuba@kernel.org, linux-can@vger.kernel.org, kernel@pengutronix.de, Patrik Flykt , Marc Kleine-Budde Subject: [net-next 4/7] can: m_can: move runtime PM enable/disable to m_can_platform Date: Thu, 10 Dec 2020 10:55:04 +0100 Message-Id: <20201210095507.1551220-5-mkl@pengutronix.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201210095507.1551220-1-mkl@pengutronix.de> References: <20201210095507.1551220-1-mkl@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:201:5054:ff:fe8d:eefb X-SA-Exim-Mail-From: mkl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: netdev@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Patrik Flykt This is a preparatory patch for upcoming PCI based M_CAN devices. The current PM implementation would cause PCI based drivers to enable PM twice, once when the PCI device is added and a second time in m_can_class_register(). This will cause 'Unbalanced pm_runtime_enable!' to be logged, and is a situation that should be avoided. Therefore, in anticipation of PCI devices, move PM enabling out from M_CAN class registration to its only user, the m_can_platform driver. Signed-off-by: Patrik Flykt Link: https://lore.kernel.org/r/20201023115800.46538-2-patrik.flykt@linux.intel.com [mkl: m_can_plat_probe(): fix error handling m_can_class_register(): simplify error handling] Signed-off-by: Marc Kleine-Budde --- drivers/net/can/m_can/m_can.c | 8 +------- drivers/net/can/m_can/m_can_platform.c | 9 ++++++++- 2 files changed, 9 insertions(+), 8 deletions(-) diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index 8f389df26afc..06c136961c7c 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -1826,10 +1826,9 @@ int m_can_class_register(struct m_can_classdev *m_can_dev) int ret; if (m_can_dev->pm_clock_support) { - pm_runtime_enable(m_can_dev->dev); ret = m_can_clk_start(m_can_dev); if (ret) - goto pm_runtime_fail; + return ret; } ret = m_can_dev_setup(m_can_dev); @@ -1855,11 +1854,6 @@ int m_can_class_register(struct m_can_classdev *m_can_dev) */ clk_disable: m_can_clk_stop(m_can_dev); -pm_runtime_fail: - if (ret) { - if (m_can_dev->pm_clock_support) - pm_runtime_disable(m_can_dev->dev); - } return ret; } diff --git a/drivers/net/can/m_can/m_can_platform.c b/drivers/net/can/m_can/m_can_platform.c index c45a889a1afd..36ef791da388 100644 --- a/drivers/net/can/m_can/m_can_platform.c +++ b/drivers/net/can/m_can/m_can_platform.c @@ -115,8 +115,15 @@ static int m_can_plat_probe(struct platform_device *pdev) m_can_init_ram(mcan_class); - return m_can_class_register(mcan_class); + pm_runtime_enable(mcan_class->dev); + ret = m_can_class_register(mcan_class); + if (ret) + goto out_runtime_disable; + + return ret; +out_runtime_disable: + pm_runtime_disable(mcan_class->dev); probe_fail: m_can_class_free_dev(mcan_class->net); return ret;