From patchwork Thu Aug 4 15:09:53 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Hovold X-Patchwork-Id: 12936491 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 76118C282E7 for ; Thu, 4 Aug 2022 15:10:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239774AbiHDPKT (ORCPT ); Thu, 4 Aug 2022 11:10:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47494 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239158AbiHDPKD (ORCPT ); Thu, 4 Aug 2022 11:10:03 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EFBE35F9B8; Thu, 4 Aug 2022 08:09:57 -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 80347B824B9; Thu, 4 Aug 2022 15:09:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1FB1BC433B5; Thu, 4 Aug 2022 15:09:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1659625795; bh=su1qZdfKRKL1PgRyMjnBJaoi0zKc/vCrn+42pIEye6Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=I4nrMAiTzXcGOE38UQFzJeLJ0KEjb8TOsucdYwnEHRn6lPP+73Xl2YAA77ps1Amil /TAZDZ4jizpFS+Z+5Iz9YH7rdMvJY1P/UVSZqAUZVoK0si76yDr1BcBzpijIF+IWFt P85p08xAxnPbPZX6ZA2bvOMLwlsXqxKH8AiNiH24wjyXQxyERgp475FP9L6657H3Ge QjqB8fmwrbIKAdwsA+1s3rWDVNp7o9lNBjDX8CLcVD+ChDwU4acLlhcRrBbbTEyQzY qE7JJaQPwiu2I5zW3H/nOKzOxhkWo6F1kapxlYLJpbt8sekO5+bOeWi40ekccp+K5s hdB93JQkp/OSg== Received: from johan by xi.lan with local (Exim 4.94.2) (envelope-from ) id 1oJcUK-00069Q-Sm; Thu, 04 Aug 2022 17:10:16 +0200 From: Johan Hovold To: Greg Kroah-Hartman , Felipe Balbi Cc: Rob Herring , Krzysztof Kozlowski , Andy Gross , Bjorn Andersson , Manivannan Sadhasivam , Konrad Dybcio , Krishna Kurapati , Stephen Boyd , Doug Anderson , "Matthias Kaehlcke" , Pavankumar Kondeti , quic_ppratap@quicinc.com, quic_vpulyala@quicinc.com, linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Johan Hovold , stable@vger.kernel.org, Andrew Halaney Subject: [PATCH v2 1/9] usb: dwc3: fix PHY disable sequence Date: Thu, 4 Aug 2022 17:09:53 +0200 Message-Id: <20220804151001.23612-2-johan+linaro@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220804151001.23612-1-johan+linaro@kernel.org> References: <20220804151001.23612-1-johan+linaro@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Generic PHYs must be powered-off before they can be tore down. Similarly, suspending legacy PHYs after having powered them off makes no sense. Fix the dwc3_core_exit() (e.g. called during suspend) and open-coded dwc3_probe() error-path sequences that got this wrong. Note that this makes dwc3_core_exit() match the dwc3_core_init() error path with respect to powering off the PHYs. Fixes: 03c1fd622f72 ("usb: dwc3: core: add phy cleanup for probe error handling") Fixes: c499ff71ff2a ("usb: dwc3: core: re-factor init and exit paths") Cc: stable@vger.kernel.org # 4.8 Reviewed-by: Andrew Halaney Reviewed-by: Matthias Kaehlcke Signed-off-by: Johan Hovold Reviewed-by: Manivannan Sadhasivam --- drivers/usb/dwc3/core.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index c5c238ab3083..16d1f328775f 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -833,15 +833,16 @@ static void dwc3_core_exit(struct dwc3 *dwc) { dwc3_event_buffers_cleanup(dwc); + usb_phy_set_suspend(dwc->usb2_phy, 1); + usb_phy_set_suspend(dwc->usb3_phy, 1); + phy_power_off(dwc->usb2_generic_phy); + phy_power_off(dwc->usb3_generic_phy); + usb_phy_shutdown(dwc->usb2_phy); usb_phy_shutdown(dwc->usb3_phy); phy_exit(dwc->usb2_generic_phy); phy_exit(dwc->usb3_generic_phy); - usb_phy_set_suspend(dwc->usb2_phy, 1); - usb_phy_set_suspend(dwc->usb3_phy, 1); - phy_power_off(dwc->usb2_generic_phy); - phy_power_off(dwc->usb3_generic_phy); dwc3_clk_disable(dwc); reset_control_assert(dwc->reset); } @@ -1879,16 +1880,16 @@ static int dwc3_probe(struct platform_device *pdev) dwc3_debugfs_exit(dwc); dwc3_event_buffers_cleanup(dwc); - usb_phy_shutdown(dwc->usb2_phy); - usb_phy_shutdown(dwc->usb3_phy); - phy_exit(dwc->usb2_generic_phy); - phy_exit(dwc->usb3_generic_phy); - usb_phy_set_suspend(dwc->usb2_phy, 1); usb_phy_set_suspend(dwc->usb3_phy, 1); phy_power_off(dwc->usb2_generic_phy); phy_power_off(dwc->usb3_generic_phy); + usb_phy_shutdown(dwc->usb2_phy); + usb_phy_shutdown(dwc->usb3_phy); + phy_exit(dwc->usb2_generic_phy); + phy_exit(dwc->usb3_generic_phy); + dwc3_ulpi_exit(dwc); err4: