From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 64BC04879D for ; Thu, 30 Nov 2023 14:49:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="xf+dml83" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 851DEC433C7; Thu, 30 Nov 2023 14:49:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1701355776; bh=hMheOj8RPHj5wMNOt8ThWMLheDs7QNjHBCKF8r15qnI=; h=Subject:To:Cc:From:Date:From; b=xf+dml83WExL1UnWR2oFM4A8PUMihLDlXopyt+xz6cftv79TgkQ7iMXB4qLh5dbG0 MwQDuhzEEpp8gYMoH+v9KcVjTihGQTfxK9a2y++bxbSP6yxEPD3yAvyhe1saSPDNy7 GHYLkcBa2T8J2MH6oVz6oHS+ovqPA2FOQXtfXXyQ= Subject: FAILED: patch "[PATCH] USB: xhci-plat: fix legacy PHY double init" failed to apply to 5.15-stable tree To: johan+linaro@kernel.org,gregkh@linuxfoundation.org,mripard@kernel.org,stanley_chang@realtek.com,stefan.eichenberger@toradex.com Cc: From: Date: Thu, 30 Nov 2023 14:49:32 +0000 Message-ID: <2023113032-tucking-rubbed-da52@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 16b7e0cccb243033de4406ffb4d892365041a1e7 # git commit -s git send-email --to '' --in-reply-to '2023113032-tucking-rubbed-da52@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: 16b7e0cccb24 ("USB: xhci-plat: fix legacy PHY double init") 424e02931e2b ("usb: xhci: plat: remove error log for failure to get usb-phy") 9134c1fd0503 ("usb: xhci: plat: Add USB 3.0 phy support") e0fe986972f5 ("usb: host: xhci-plat: prepare operation w/o shared hcd") 0cf1ea040a7e ("usb: host: xhci-plat: create shared hcd after having added main hcd") 8e10548f7f48 ("Revert "usb: host: xhci: mvebu: make USB 3.0 PHY optional for Armada 3720"") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 16b7e0cccb243033de4406ffb4d892365041a1e7 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Fri, 3 Nov 2023 17:43:23 +0100 Subject: [PATCH] USB: xhci-plat: fix legacy PHY double init Commits 7b8ef22ea547 ("usb: xhci: plat: Add USB phy support") and 9134c1fd0503 ("usb: xhci: plat: Add USB 3.0 phy support") added support for looking up legacy PHYs from the sysdev devicetree node and initialising them. This broke drivers such as dwc3 which manages PHYs themself as the PHYs would now be initialised twice, something which specifically can lead to resources being left enabled during suspend (e.g. with the usb_phy_generic PHY driver). As the dwc3 driver uses driver-name matching for the xhci platform device, fix this by only looking up and initialising PHYs for devices that have been matched using OF. Note that checking that the platform device has a devicetree node would currently be sufficient, but that could lead to subtle breakages in case anyone ever tries to reuse an ancestor's node. Fixes: 7b8ef22ea547 ("usb: xhci: plat: Add USB phy support") Fixes: 9134c1fd0503 ("usb: xhci: plat: Add USB 3.0 phy support") Cc: stable@vger.kernel.org # 4.1 Cc: Maxime Ripard Cc: Stanley Chang Signed-off-by: Johan Hovold Tested-by: Stefan Eichenberger Tested-by: Stanley Chang Link: https://lore.kernel.org/r/20231103164323.14294-1-johan+linaro@kernel.org Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c index b93161374293..732cdeb73920 100644 --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -148,7 +149,7 @@ int xhci_plat_probe(struct platform_device *pdev, struct device *sysdev, const s int ret; int irq; struct xhci_plat_priv *priv = NULL; - + bool of_match; if (usb_disabled()) return -ENODEV; @@ -253,16 +254,23 @@ int xhci_plat_probe(struct platform_device *pdev, struct device *sysdev, const s &xhci->imod_interval); } - hcd->usb_phy = devm_usb_get_phy_by_phandle(sysdev, "usb-phy", 0); - if (IS_ERR(hcd->usb_phy)) { - ret = PTR_ERR(hcd->usb_phy); - if (ret == -EPROBE_DEFER) - goto disable_clk; - hcd->usb_phy = NULL; - } else { - ret = usb_phy_init(hcd->usb_phy); - if (ret) - goto disable_clk; + /* + * Drivers such as dwc3 manages PHYs themself (and rely on driver name + * matching for the xhci platform device). + */ + of_match = of_match_device(pdev->dev.driver->of_match_table, &pdev->dev); + if (of_match) { + hcd->usb_phy = devm_usb_get_phy_by_phandle(sysdev, "usb-phy", 0); + if (IS_ERR(hcd->usb_phy)) { + ret = PTR_ERR(hcd->usb_phy); + if (ret == -EPROBE_DEFER) + goto disable_clk; + hcd->usb_phy = NULL; + } else { + ret = usb_phy_init(hcd->usb_phy); + if (ret) + goto disable_clk; + } } hcd->tpl_support = of_usb_host_tpl_support(sysdev->of_node); @@ -285,15 +293,17 @@ int xhci_plat_probe(struct platform_device *pdev, struct device *sysdev, const s goto dealloc_usb2_hcd; } - xhci->shared_hcd->usb_phy = devm_usb_get_phy_by_phandle(sysdev, - "usb-phy", 1); - if (IS_ERR(xhci->shared_hcd->usb_phy)) { - xhci->shared_hcd->usb_phy = NULL; - } else { - ret = usb_phy_init(xhci->shared_hcd->usb_phy); - if (ret) - dev_err(sysdev, "%s init usb3phy fail (ret=%d)\n", - __func__, ret); + if (of_match) { + xhci->shared_hcd->usb_phy = devm_usb_get_phy_by_phandle(sysdev, + "usb-phy", 1); + if (IS_ERR(xhci->shared_hcd->usb_phy)) { + xhci->shared_hcd->usb_phy = NULL; + } else { + ret = usb_phy_init(xhci->shared_hcd->usb_phy); + if (ret) + dev_err(sysdev, "%s init usb3phy fail (ret=%d)\n", + __func__, ret); + } } xhci->shared_hcd->tpl_support = hcd->tpl_support;