From mboxrd@z Thu Jan 1 00:00:00 1970 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 16C44C761A6 for ; Mon, 3 Apr 2023 14:35:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233577AbjDCOf2 (ORCPT ); Mon, 3 Apr 2023 10:35:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42358 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233582AbjDCOfZ (ORCPT ); Mon, 3 Apr 2023 10:35:25 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4006E2701 for ; Mon, 3 Apr 2023 07:35:23 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id ED977B81C96 for ; Mon, 3 Apr 2023 14:35:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6CA51C433D2; Mon, 3 Apr 2023 14:35:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1680532520; bh=UJvwCMbuQins9OiCsCCL7DT2Adm/PW8+hpqKzU0gX1g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rnSJQyBM76pewgrdULa1xwcI/DL/5ZEk3pQHWo26cvQ39nh7tTTjnl8OqIADKXHlt VCmDNVMcTWSFR160SLdiDALd46c1I6W0sL0vzBrWORus/GzOu5d5rY9ZSTaS5SZbcO eccHiXE30ZUKcGnTTxSFFl+3GcwBx2cYY6t3Dmxc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Siddharth Vadapalli , Leon Romanovsky , Tony Nguyen , Roger Quadros , Paolo Abeni , Sasha Levin Subject: [PATCH 6.1 015/181] net: ethernet: ti: am65-cpsw/cpts: Fix CPTS release action Date: Mon, 3 Apr 2023 16:07:30 +0200 Message-Id: <20230403140415.613916322@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230403140415.090615502@linuxfoundation.org> References: <20230403140415.090615502@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Siddharth Vadapalli [ Upstream commit 4ad8766cd3982744e53f107f378d2c65b76ff9a8 ] The am65_cpts_release() function is registered as a devm_action in the am65_cpts_create() function in am65-cpts driver. When the am65-cpsw driver invokes am65_cpts_create(), am65_cpts_release() is added in the set of devm actions associated with the am65-cpsw driver's device. In the event of probe failure or probe deferral, the platform_drv_probe() function invokes dev_pm_domain_detach() which powers off the CPSW and the CPSW's CPTS hardware, both of which share the same power domain. Since the am65_cpts_disable() function invoked by the am65_cpts_release() function attempts to reset the CPTS hardware by writing to its registers, the CPTS hardware is assumed to be powered on at this point. However, the hardware is powered off before the devm actions are executed. Fix this by getting rid of the devm action for am65_cpts_release() and invoking it directly on the cleanup and exit paths. Fixes: f6bd59526ca5 ("net: ethernet: ti: introduce am654 common platform time sync driver") Signed-off-by: Siddharth Vadapalli Reviewed-by: Leon Romanovsky Reviewed-by: Tony Nguyen Reviewed-by: Roger Quadros Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- drivers/net/ethernet/ti/am65-cpsw-nuss.c | 2 ++ drivers/net/ethernet/ti/am65-cpts.c | 15 +++++---------- drivers/net/ethernet/ti/am65-cpts.h | 5 +++++ 3 files changed, 12 insertions(+), 10 deletions(-) diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c index 00911e9360525..8ff1c84a23ce7 100644 --- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c +++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c @@ -2817,6 +2817,7 @@ static int am65_cpsw_nuss_probe(struct platform_device *pdev) err_free_phylink: am65_cpsw_nuss_phylink_cleanup(common); + am65_cpts_release(common->cpts); err_of_clear: of_platform_device_destroy(common->mdio_dev, NULL); err_pm_clear: @@ -2845,6 +2846,7 @@ static int am65_cpsw_nuss_remove(struct platform_device *pdev) */ am65_cpsw_nuss_cleanup_ndev(common); am65_cpsw_nuss_phylink_cleanup(common); + am65_cpts_release(common->cpts); of_platform_device_destroy(common->mdio_dev, NULL); diff --git a/drivers/net/ethernet/ti/am65-cpts.c b/drivers/net/ethernet/ti/am65-cpts.c index e2f0fb286143b..9948ac14e68db 100644 --- a/drivers/net/ethernet/ti/am65-cpts.c +++ b/drivers/net/ethernet/ti/am65-cpts.c @@ -918,14 +918,13 @@ static int am65_cpts_of_parse(struct am65_cpts *cpts, struct device_node *node) return cpts_of_mux_clk_setup(cpts, node); } -static void am65_cpts_release(void *data) +void am65_cpts_release(struct am65_cpts *cpts) { - struct am65_cpts *cpts = data; - ptp_clock_unregister(cpts->ptp_clock); am65_cpts_disable(cpts); clk_disable_unprepare(cpts->refclk); } +EXPORT_SYMBOL_GPL(am65_cpts_release); struct am65_cpts *am65_cpts_create(struct device *dev, void __iomem *regs, struct device_node *node) @@ -1003,18 +1002,12 @@ struct am65_cpts *am65_cpts_create(struct device *dev, void __iomem *regs, } cpts->phc_index = ptp_clock_index(cpts->ptp_clock); - ret = devm_add_action_or_reset(dev, am65_cpts_release, cpts); - if (ret) { - dev_err(dev, "failed to add ptpclk reset action %d", ret); - return ERR_PTR(ret); - } - ret = devm_request_threaded_irq(dev, cpts->irq, NULL, am65_cpts_interrupt, IRQF_ONESHOT, dev_name(dev), cpts); if (ret < 0) { dev_err(cpts->dev, "error attaching irq %d\n", ret); - return ERR_PTR(ret); + goto reset_ptpclk; } dev_info(dev, "CPTS ver 0x%08x, freq:%u, add_val:%u\n", @@ -1023,6 +1016,8 @@ struct am65_cpts *am65_cpts_create(struct device *dev, void __iomem *regs, return cpts; +reset_ptpclk: + am65_cpts_release(cpts); refclk_disable: clk_disable_unprepare(cpts->refclk); return ERR_PTR(ret); diff --git a/drivers/net/ethernet/ti/am65-cpts.h b/drivers/net/ethernet/ti/am65-cpts.h index cf9fbc28fd032..c0ae0117e5737 100644 --- a/drivers/net/ethernet/ti/am65-cpts.h +++ b/drivers/net/ethernet/ti/am65-cpts.h @@ -18,6 +18,7 @@ struct am65_cpts_estf_cfg { }; #if IS_ENABLED(CONFIG_TI_K3_AM65_CPTS) +void am65_cpts_release(struct am65_cpts *cpts); struct am65_cpts *am65_cpts_create(struct device *dev, void __iomem *regs, struct device_node *node); int am65_cpts_phc_index(struct am65_cpts *cpts); @@ -29,6 +30,10 @@ int am65_cpts_estf_enable(struct am65_cpts *cpts, int idx, struct am65_cpts_estf_cfg *cfg); void am65_cpts_estf_disable(struct am65_cpts *cpts, int idx); #else +static inline void am65_cpts_release(struct am65_cpts *cpts) +{ +} + static inline struct am65_cpts *am65_cpts_create(struct device *dev, void __iomem *regs, struct device_node *node) -- 2.39.2