From patchwork Wed May 14 16:02:23 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Philipp Zabel X-Patchwork-Id: 4176051 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 0BCA29F387 for ; Wed, 14 May 2014 16:02:38 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1B38D20204 for ; Wed, 14 May 2014 16:02:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DE110201C7 for ; Wed, 14 May 2014 16:02:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755514AbaENQCf (ORCPT ); Wed, 14 May 2014 12:02:35 -0400 Received: from metis.ext.pengutronix.de ([92.198.50.35]:50492 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755453AbaENQCe (ORCPT ); Wed, 14 May 2014 12:02:34 -0400 Received: from dude.hi.pengutronix.de ([10.1.0.7] helo=dude.pengutronix.de) by metis.ext.pengutronix.de with esmtp (Exim 4.72) (envelope-from ) id 1WkbdP-0002X0-IZ; Wed, 14 May 2014 18:02:23 +0200 From: Philipp Zabel To: "Rafael J. Wysocki" Cc: Viresh Kumar , Shawn Guo , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, kernel@pengutronix.de, Philipp Zabel Subject: [PATCH RESEND 1/2] cpufreq: imx6q: Drop devm_clk/regulator_get usage Date: Wed, 14 May 2014 18:02:23 +0200 Message-Id: <1400083344-20042-1-git-send-email-p.zabel@pengutronix.de> X-Mailer: git-send-email 2.0.0.rc0 X-SA-Exim-Connect-IP: 10.1.0.7 X-SA-Exim-Mail-From: p.zabel@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-pm@vger.kernel.org Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This driver is using devres managed calls incorrectly, giving the cpu0 device as first parameter instead of the cpufreq platform device. This results in resources not being freed if the cpufreq platform device is unbound, for example if probing has to be deferred for a missing regulator. Supporting probe deferral properly is a prerequisite to enabling the internal LDO bypass on i.MX6 and regulating the CPU voltage with an external regulator. Acked-by: Viresh Kumar Acked-by: Shawn Guo Signed-off-by: Philipp Zabel --- Resent to linux-pm@vger.kernel.org instead of cpufreq@vger.kernel.org. --- drivers/cpufreq/imx6q-cpufreq.c | 53 ++++++++++++++++++++++++++++++----------- 1 file changed, 39 insertions(+), 14 deletions(-) diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c index e27fca8..92a82ec 100644 --- a/drivers/cpufreq/imx6q-cpufreq.c +++ b/drivers/cpufreq/imx6q-cpufreq.c @@ -170,25 +170,25 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev) return -ENOENT; } - arm_clk = devm_clk_get(cpu_dev, "arm"); - pll1_sys_clk = devm_clk_get(cpu_dev, "pll1_sys"); - pll1_sw_clk = devm_clk_get(cpu_dev, "pll1_sw"); - step_clk = devm_clk_get(cpu_dev, "step"); - pll2_pfd2_396m_clk = devm_clk_get(cpu_dev, "pll2_pfd2_396m"); + arm_clk = clk_get(cpu_dev, "arm"); + pll1_sys_clk = clk_get(cpu_dev, "pll1_sys"); + pll1_sw_clk = clk_get(cpu_dev, "pll1_sw"); + step_clk = clk_get(cpu_dev, "step"); + pll2_pfd2_396m_clk = clk_get(cpu_dev, "pll2_pfd2_396m"); if (IS_ERR(arm_clk) || IS_ERR(pll1_sys_clk) || IS_ERR(pll1_sw_clk) || IS_ERR(step_clk) || IS_ERR(pll2_pfd2_396m_clk)) { dev_err(cpu_dev, "failed to get clocks\n"); ret = -ENOENT; - goto put_node; + goto put_clk; } - arm_reg = devm_regulator_get(cpu_dev, "arm"); - pu_reg = devm_regulator_get(cpu_dev, "pu"); - soc_reg = devm_regulator_get(cpu_dev, "soc"); + arm_reg = regulator_get(cpu_dev, "arm"); + pu_reg = regulator_get(cpu_dev, "pu"); + soc_reg = regulator_get(cpu_dev, "soc"); if (IS_ERR(arm_reg) || IS_ERR(pu_reg) || IS_ERR(soc_reg)) { dev_err(cpu_dev, "failed to get regulators\n"); ret = -ENOENT; - goto put_node; + goto put_reg; } /* @@ -201,21 +201,21 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev) ret = of_init_opp_table(cpu_dev); if (ret < 0) { dev_err(cpu_dev, "failed to init OPP table: %d\n", ret); - goto put_node; + goto put_reg; } num = dev_pm_opp_get_opp_count(cpu_dev); if (num < 0) { ret = num; dev_err(cpu_dev, "no OPP table is found: %d\n", ret); - goto put_node; + goto put_reg; } } ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table); if (ret) { dev_err(cpu_dev, "failed to init cpufreq table: %d\n", ret); - goto put_node; + goto put_reg; } /* Make imx6_soc_volt array's size same as arm opp number */ @@ -301,7 +301,24 @@ soc_opp_out: free_freq_table: dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table); -put_node: +put_reg: + if (!IS_ERR(arm_reg)) + regulator_put(arm_reg); + if (!IS_ERR(pu_reg)) + regulator_put(pu_reg); + if (!IS_ERR(soc_reg)) + regulator_put(soc_reg); +put_clk: + if (!IS_ERR(arm_clk)) + clk_put(arm_clk); + if (!IS_ERR(pll1_sys_clk)) + clk_put(pll1_sys_clk); + if (!IS_ERR(pll1_sw_clk)) + clk_put(pll1_sw_clk); + if (!IS_ERR(step_clk)) + clk_put(step_clk); + if (!IS_ERR(pll2_pfd2_396m_clk)) + clk_put(pll2_pfd2_396m_clk); of_node_put(np); return ret; } @@ -310,6 +327,14 @@ static int imx6q_cpufreq_remove(struct platform_device *pdev) { cpufreq_unregister_driver(&imx6q_cpufreq_driver); dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table); + regulator_put(arm_reg); + regulator_put(pu_reg); + regulator_put(soc_reg); + clk_put(arm_clk); + clk_put(pll1_sys_clk); + clk_put(pll1_sw_clk); + clk_put(step_clk); + clk_put(pll2_pfd2_396m_clk); return 0; }