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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4C710C88E4D for ; Fri, 11 Sep 2026 22:12:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Message-ID: Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:References: List-Owner; bh=dr4kTFi/Bl7v/uXXkSoBnkVWtkU1qSQLLKFVw8YaRSs=; b=f9fR2zwrYEyPkD 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DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789164731; bh=zcSpC8B/zBe1QBiSP3SsQ8IbOXdwAlEg8XGj9L10bq8=; h=Date:From:To:Cc:Subject:In-Reply-To; b=fpZSM3z6PJ9swFzsvH+djv6QNuc3r3Jbh6fc5fg1plDIs1WScdIHvAlLBKslHFOpC VUlgeo0f4KrBy7cqz2x9XD+Eh3NSgeWTi4XevOllxU7aRx6le8EGCRlOn+NRS1y7ZT GYBZJbc5xO7X6hzpn+Zvxucqhh1evUkZ/RnAsEuHLV1vwBDcR/+mcWL3e5UX0jetdV yVMQfWSmiYNtJBa+MBKplM6FwGvkAsIabg7ccf5NsRaHmsVooL7N1AKbaAWG/Rv2bV 0AwWtnXJG/bkaR0cMvSqKCps8HWA3DXqOgv3MqLk2Vx/pAe1cBKiOZbR7fWWy90N/G b2VIe389tv9qg== Date: Fri, 11 Sep 2026 17:12:09 -0500 From: Bjorn Helgaas To: Vladimir Oltean Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, linux-tegra@vger.kernel.org, Bjorn Helgaas , Manivannan Sadhasivam , Lorenzo Pieralisi , Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= , Rob Herring , Vignesh Raghavendra , Siddharth Vadapalli , Felix Gu Subject: Re: [PATCH v9 3/3] PCI: Remove device links to PHY Message-ID: <20260911221209.GA587622@bhelgaas> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20260810124315.433448-4-vladimir.oltean@nxp.com> X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org WytjYyBGZWxpeCwgYXV0aG9yIG9mIGRldmljZSBsaW5rIGxlYWsgZml4ZXNdCgpPbiBNb24sIEF1 ZyAxMCwgMjAyNiBhdCAwMzo0MzoxNVBNICswMzAwLCBWbGFkaW1pciBPbHRlYW4gd3JvdGU6Cj4g VGhpcyBpcyBwcmFjdGljYWxseSBhIGZ1bGwgcmV2ZXJ0IG9mIGNvbW1pdAo+IDdhNGRiNjU2YTYz NSAoIlBDSTogZHJhN3h4OiBDcmVhdGUgZnVuY3Rpb25hbCBkZXBlbmRlbmN5IGJldHdlZW4gUENJ 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([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x59Ti-00000000EVR-2MN0; Fri, 11 Sep 2026 22:12:14 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x59Tg-00000000EUu-0uVh; Fri, 11 Sep 2026 22:12:12 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 500FF60008; Fri, 11 Sep 2026 22:12:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CD6811F000FF; Fri, 11 Sep 2026 22:12:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789164731; bh=zcSpC8B/zBe1QBiSP3SsQ8IbOXdwAlEg8XGj9L10bq8=; h=Date:From:To:Cc:Subject:In-Reply-To; b=fpZSM3z6PJ9swFzsvH+djv6QNuc3r3Jbh6fc5fg1plDIs1WScdIHvAlLBKslHFOpC VUlgeo0f4KrBy7cqz2x9XD+Eh3NSgeWTi4XevOllxU7aRx6le8EGCRlOn+NRS1y7ZT GYBZJbc5xO7X6hzpn+Zvxucqhh1evUkZ/RnAsEuHLV1vwBDcR/+mcWL3e5UX0jetdV yVMQfWSmiYNtJBa+MBKplM6FwGvkAsIabg7ccf5NsRaHmsVooL7N1AKbaAWG/Rv2bV 0AwWtnXJG/bkaR0cMvSqKCps8HWA3DXqOgv3MqLk2Vx/pAe1cBKiOZbR7fWWy90N/G b2VIe389tv9qg== Date: Fri, 11 Sep 2026 17:12:09 -0500 From: Bjorn Helgaas To: Vladimir Oltean Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, linux-tegra@vger.kernel.org, Bjorn Helgaas , Manivannan Sadhasivam , Lorenzo Pieralisi , Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= , Rob Herring , Vignesh Raghavendra , Siddharth Vadapalli , Felix Gu Subject: Re: [PATCH v9 3/3] PCI: Remove device links to PHY Message-ID: <20260911221209.GA587622@bhelgaas> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20260810124315.433448-4-vladimir.oltean@nxp.com> X-BeenThere: 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11 Sep 2026 22:12:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789164731; bh=zcSpC8B/zBe1QBiSP3SsQ8IbOXdwAlEg8XGj9L10bq8=; h=Date:From:To:Cc:Subject:In-Reply-To; b=fpZSM3z6PJ9swFzsvH+djv6QNuc3r3Jbh6fc5fg1plDIs1WScdIHvAlLBKslHFOpC VUlgeo0f4KrBy7cqz2x9XD+Eh3NSgeWTi4XevOllxU7aRx6le8EGCRlOn+NRS1y7ZT GYBZJbc5xO7X6hzpn+Zvxucqhh1evUkZ/RnAsEuHLV1vwBDcR/+mcWL3e5UX0jetdV yVMQfWSmiYNtJBa+MBKplM6FwGvkAsIabg7ccf5NsRaHmsVooL7N1AKbaAWG/Rv2bV 0AwWtnXJG/bkaR0cMvSqKCps8HWA3DXqOgv3MqLk2Vx/pAe1cBKiOZbR7fWWy90N/G b2VIe389tv9qg== Date: Fri, 11 Sep 2026 17:12:09 -0500 From: Bjorn Helgaas To: Vladimir Oltean Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, linux-tegra@vger.kernel.org, Bjorn Helgaas , Manivannan Sadhasivam , Lorenzo Pieralisi , Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= , Rob Herring , Vignesh Raghavendra , Siddharth Vadapalli , Felix Gu Subject: Re: [PATCH v9 3/3] PCI: Remove device links to PHY Message-ID: <20260911221209.GA587622@bhelgaas> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20260810124315.433448-4-vladimir.oltean@nxp.com> [+cc Felix, author of device link leak fixes] On Mon, Aug 10, 2026 at 03:43:15PM +0300, Vladimir Oltean wrote: > This is practically a full revert of commit > 7a4db656a635 ("PCI: dra7xx: Create functional dependency between PCIe and PHY") > and a partial revert of the device link pieces from commits > dfb80534692d ("PCI: cadence: Add generic PHY support to host and EP drivers") > 49229238ab47 ("PCI: keystone: Cleanup PHY handling") Can we split this into three commits (dra7xx, cadence, keystone)? This combined commit is applied on the pci/controller/misc branch, and then we have conflicts between that branch and pci/controller/dwc-dra7xx. I think if we split this into three separate commits, we can apply the dra7xx one on pci/controller/dwc-dra7xx and drop Felix's device link leak fixes below so we don't clutter the git history with conflict resolutions or irrelevant commits: https://git.kernel.org/cgit/linux/kernel/git/pci/pci.git/commit/?id=2b9a036b568c ("PCI: dra7xx: Fix device link leak when devm_phy_get() fails") https://git.kernel.org/cgit/linux/kernel/git/pci/pci.git/commit/?id=bdfdf654b4b2 ("PCI: dra7xx: Fix device links leak when dra7xx_pcie_enable_phy() fails") > The trouble with these commits is that they dereference fields inside > struct phy from a consumer driver, which will become no longer possible. > > Since commit 987351e1ea77 ("phy: core: Add consumer device link > support") from 2019, the PHY core also adds a device link to order PHY > provider and consumer suspend/resume operations. All reverted commits > are from 2017-2018, and what they do should actually be redundant now. > > Signed-off-by: Vladimir Oltean > Acked-by: Bjorn Helgaas > Reviewed-by: Manivannan Sadhasivam > --- > Cc: Lorenzo Pieralisi > Cc: "Krzysztof Wilczyński" > Cc: Manivannan Sadhasivam > Cc: Rob Herring > Cc: Bjorn Helgaas > Cc: Vignesh Raghavendra > Cc: Siddharth Vadapalli > > v8->v9: none > v7->v8: only context change - "return 0" became "return ret" for > cdns_plat_pcie_probe() > v6->v7: none > v5->v6: collect tag from Manivannan Sadhasivam > v3->v5: none > v2->v3: > - remove dangling set but unused phy_count local variable in > cdns_plat_pcie_probe() > v1->v2: > - fully remove struct device link **link from struct cdns_pcie and from > cdns_plat_pcie_probe() error path > - collect tag from Bjorn Helgaas > - adjust commit title > --- > .../controller/cadence/pcie-cadence-plat.c | 4 --- > drivers/pci/controller/cadence/pcie-cadence.c | 16 +--------- > drivers/pci/controller/cadence/pcie-cadence.h | 2 -- > drivers/pci/controller/dwc/pci-dra7xx.c | 16 ---------- > drivers/pci/controller/dwc/pci-keystone.c | 31 +++---------------- > 5 files changed, 5 insertions(+), 64 deletions(-) > > diff --git a/drivers/pci/controller/cadence/pcie-cadence-plat.c b/drivers/pci/controller/cadence/pcie-cadence-plat.c > index 8aed8b4c3e11..13edc6be21f5 100644 > --- a/drivers/pci/controller/cadence/pcie-cadence-plat.c > +++ b/drivers/pci/controller/cadence/pcie-cadence-plat.c > @@ -41,7 +41,6 @@ static int cdns_plat_pcie_probe(struct platform_device *pdev) > struct pci_host_bridge *bridge; > struct cdns_pcie_ep *ep; > struct cdns_pcie_rc *rc; > - int phy_count; > bool is_rc; > int ret; > > @@ -122,9 +121,6 @@ static int cdns_plat_pcie_probe(struct platform_device *pdev) > pm_runtime_put_sync(dev); > pm_runtime_disable(dev); > cdns_pcie_disable_phy(cdns_plat_pcie->pcie); > - phy_count = cdns_plat_pcie->pcie->phy_count; > - while (phy_count--) > - device_link_del(cdns_plat_pcie->pcie->link[phy_count]); > > return ret; > } > diff --git a/drivers/pci/controller/cadence/pcie-cadence.c b/drivers/pci/controller/cadence/pcie-cadence.c > index a1eada56edba..0ac980249941 100644 > --- a/drivers/pci/controller/cadence/pcie-cadence.c > +++ b/drivers/pci/controller/cadence/pcie-cadence.c > @@ -222,7 +222,6 @@ int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie) > struct device_node *np = dev->of_node; > int phy_count; > struct phy **phy; > - struct device_link **link; > int i; > int ret; > const char *name; > @@ -238,10 +237,6 @@ int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie) > if (!phy) > return -ENOMEM; > > - link = devm_kcalloc(dev, phy_count, sizeof(*link), GFP_KERNEL); > - if (!link) > - return -ENOMEM; > - > for (i = 0; i < phy_count; i++) { > of_property_read_string_index(np, "phy-names", i, &name); > phy[i] = devm_phy_get(dev, name); > @@ -249,17 +244,10 @@ int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie) > ret = PTR_ERR(phy[i]); > goto err_phy; > } > - link[i] = device_link_add(dev, &phy[i]->dev, DL_FLAG_STATELESS); > - if (!link[i]) { > - devm_phy_put(dev, phy[i]); > - ret = -EINVAL; > - goto err_phy; > - } > } > > pcie->phy_count = phy_count; > pcie->phy = phy; > - pcie->link = link; > > ret = cdns_pcie_enable_phy(pcie); > if (ret) > @@ -268,10 +256,8 @@ int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie) > return 0; > > err_phy: > - while (--i >= 0) { > - device_link_del(link[i]); > + while (--i >= 0) > devm_phy_put(dev, phy[i]); > - } > > return ret; > } > diff --git a/drivers/pci/controller/cadence/pcie-cadence.h b/drivers/pci/controller/cadence/pcie-cadence.h > index b4d51adefea5..4a96e1869e53 100644 > --- a/drivers/pci/controller/cadence/pcie-cadence.h > +++ b/drivers/pci/controller/cadence/pcie-cadence.h > @@ -260,7 +260,6 @@ struct cdns_plat_pcie_of_data { > * @is_hpa: indicates if the architecture is HPA > * @phy_count: number of supported PHY devices > * @phy: list of pointers to specific PHY control blocks > - * @link: list of pointers to corresponding device link representations > * @ops: Platform-specific ops to control various inputs from Cadence PCIe > * wrapper > * @cdns_pcie_reg_offsets: Register bank offsets for different SoC > @@ -276,7 +275,6 @@ struct cdns_pcie { > bool is_hpa; > int phy_count; > struct phy **phy; > - struct device_link **link; > const struct cdns_pcie_ops *ops; > const struct cdns_plat_pcie_of_data *cdns_pcie_reg_offsets; > int max_link_speed; > diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c > index 3fc889944f02..bf6c5b86bb27 100644 > --- a/drivers/pci/controller/dwc/pci-dra7xx.c > +++ b/drivers/pci/controller/dwc/pci-dra7xx.c > @@ -9,7 +9,6 @@ > > #include > #include > -#include > #include > #include > #include > @@ -678,7 +677,6 @@ static int dra7xx_pcie_probe(struct platform_device *pdev) > int i; > int phy_count; > struct phy **phy; > - struct device_link **link; > void __iomem *base; > struct dw_pcie *pci; > struct dra7xx_pcie *dra7xx; > @@ -726,10 +724,6 @@ static int dra7xx_pcie_probe(struct platform_device *pdev) > if (!phy) > return -ENOMEM; > > - link = devm_kcalloc(dev, phy_count, sizeof(*link), GFP_KERNEL); > - if (!link) > - return -ENOMEM; > - > dra7xx->clk = devm_clk_get_optional(dev, NULL); > if (IS_ERR(dra7xx->clk)) > return dev_err_probe(dev, PTR_ERR(dra7xx->clk), > @@ -744,12 +738,6 @@ static int dra7xx_pcie_probe(struct platform_device *pdev) > phy[i] = devm_phy_get(dev, name); > if (IS_ERR(phy[i])) > return PTR_ERR(phy[i]); > - > - link[i] = device_link_add(dev, &phy[i]->dev, DL_FLAG_STATELESS); > - if (!link[i]) { > - ret = -EINVAL; > - goto err_link; > - } > } > > dra7xx->base = base; > @@ -851,10 +839,6 @@ static int dra7xx_pcie_probe(struct platform_device *pdev) > pm_runtime_disable(dev); > dra7xx_pcie_disable_phy(dra7xx); > > -err_link: > - while (--i >= 0) > - device_link_del(link[i]); > - > return ret; > } > > diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c > index e9b012a5ea9a..8085c4f61403 100644 > --- a/drivers/pci/controller/dwc/pci-keystone.c > +++ b/drivers/pci/controller/dwc/pci-keystone.c > @@ -130,7 +130,6 @@ struct keystone_pcie { > int num_lanes; > u32 num_viewport; > struct phy **phy; > - struct device_link **link; > struct device_node *msi_intc_np; > struct irq_domain *intx_irq_domain; > struct device_node *np; > @@ -1130,7 +1129,6 @@ static int ks_pcie_probe(struct platform_device *pdev) > enum dw_pcie_device_mode mode; > struct dw_pcie *pci; > struct keystone_pcie *ks_pcie; > - struct device_link **link; > struct gpio_desc *gpiod; > struct resource *res; > void __iomem *base; > @@ -1201,31 +1199,17 @@ static int ks_pcie_probe(struct platform_device *pdev) > if (!phy) > return -ENOMEM; > > - link = devm_kcalloc(dev, num_lanes, sizeof(*link), GFP_KERNEL); > - if (!link) > - return -ENOMEM; > - > for (i = 0; i < num_lanes; i++) { > snprintf(name, sizeof(name), "pcie-phy%d", i); > phy[i] = devm_phy_optional_get(dev, name); > if (IS_ERR(phy[i])) { > ret = PTR_ERR(phy[i]); > - goto err_link; > - } > - > - if (!phy[i]) > - continue; > - > - link[i] = device_link_add(dev, &phy[i]->dev, DL_FLAG_STATELESS); > - if (!link[i]) { > - ret = -EINVAL; > - goto err_link; > + goto err; > } > } > > ks_pcie->np = np; > ks_pcie->pci = pci; > - ks_pcie->link = link; > ks_pcie->num_lanes = num_lanes; > ks_pcie->phy = phy; > > @@ -1235,7 +1219,7 @@ static int ks_pcie_probe(struct platform_device *pdev) > ret = PTR_ERR(gpiod); > if (ret != -EPROBE_DEFER) > dev_err(dev, "Failed to get reset GPIO\n"); > - goto err_link; > + goto err; > } > > /* Obtain references to the PHYs */ > @@ -1250,7 +1234,7 @@ static int ks_pcie_probe(struct platform_device *pdev) > > if (ret) { > dev_err(dev, "failed to enable phy\n"); > - goto err_link; > + goto err; > } > > platform_set_drvdata(pdev, ks_pcie); > @@ -1337,25 +1321,18 @@ static int ks_pcie_probe(struct platform_device *pdev) > pm_runtime_disable(dev); > ks_pcie_disable_phy(ks_pcie); > > -err_link: > - while (--i >= 0 && link[i]) > - device_link_del(link[i]); > - > +err: > return ret; > } > > static void ks_pcie_remove(struct platform_device *pdev) > { > struct keystone_pcie *ks_pcie = platform_get_drvdata(pdev); > - struct device_link **link = ks_pcie->link; > - int num_lanes = ks_pcie->num_lanes; > struct device *dev = &pdev->dev; > > pm_runtime_put(dev); > pm_runtime_disable(dev); > ks_pcie_disable_phy(ks_pcie); > - while (num_lanes--) > - device_link_del(link[num_lanes]); > } > > static struct platform_driver ks_pcie_driver = { > -- > 2.34.1 >