From patchwork Tue Nov 23 07:31:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Zhu X-Patchwork-Id: 12633629 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com 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 2032EC433FE for ; Tue, 23 Nov 2021 07:59:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234514AbhKWICU (ORCPT ); Tue, 23 Nov 2021 03:02:20 -0500 Received: from inva020.nxp.com ([92.121.34.13]:49914 "EHLO inva020.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234488AbhKWICT (ORCPT ); Tue, 23 Nov 2021 03:02:19 -0500 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 6A97B1A054A; Tue, 23 Nov 2021 08:59:11 +0100 (CET) Received: from aprdc01srsp001v.ap-rdc01.nxp.com (aprdc01srsp001v.ap-rdc01.nxp.com [165.114.16.16]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 309381A058C; Tue, 23 Nov 2021 08:59:11 +0100 (CET) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by aprdc01srsp001v.ap-rdc01.nxp.com (Postfix) with ESMTP id 42520183AC4E; Tue, 23 Nov 2021 15:59:08 +0800 (+08) From: Richard Zhu To: l.stach@pengutronix.de, bhelgaas@google.com, broonie@kernel.org, lorenzo.pieralisi@arm.com, jingoohan1@gmail.com Cc: hongxing.zhu@nxp.com, linux-pci@vger.kernel.org, linux-imx@nxp.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel@pengutronix.de Subject: [RESEND v4 2/6] PCI: imx6: Add the error propagation from host_init Date: Tue, 23 Nov 2021 15:31:53 +0800 Message-Id: <1637652717-17313-3-git-send-email-hongxing.zhu@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1637652717-17313-1-git-send-email-hongxing.zhu@nxp.com> References: <1637652717-17313-1-git-send-email-hongxing.zhu@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Since there is error return check of the host_init callback, add error check to imx6_pcie_deassert_core_reset() function, and change the function type accordingly. Signed-off-by: Richard Zhu Reviewed-by: Lucas Stach --- drivers/pci/controller/dwc/pci-imx6.c | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 3bf041314ba7..65a10b048a8b 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -527,24 +527,24 @@ static void imx7d_pcie_wait_for_phy_pll_lock(struct imx6_pcie *imx6_pcie) dev_err(dev, "PCIe PLL lock timeout\n"); } -static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie) +static int imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie) { struct dw_pcie *pci = imx6_pcie->pci; struct device *dev = pci->dev; - int ret; + int ret, err; if (imx6_pcie->vpcie && !regulator_is_enabled(imx6_pcie->vpcie)) { ret = regulator_enable(imx6_pcie->vpcie); if (ret) { dev_err(dev, "failed to enable vpcie regulator: %d\n", ret); - return; + return ret; } } - ret = imx6_pcie_clk_enable(imx6_pcie); - if (ret) { - dev_err(dev, "unable to enable pcie clocks\n"); + err = imx6_pcie_clk_enable(imx6_pcie); + if (err) { + dev_err(dev, "unable to enable pcie clocks: %d\n", err); goto err_clks; } @@ -599,7 +599,7 @@ static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie) break; } - return; + return 0; err_clks: if (imx6_pcie->vpcie && regulator_is_enabled(imx6_pcie->vpcie) > 0) { @@ -608,6 +608,7 @@ static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie) dev_err(dev, "failed to disable vpcie regulator: %d\n", ret); } + return err; } static void imx6_pcie_configure_type(struct imx6_pcie *imx6_pcie) @@ -858,11 +859,18 @@ static int imx6_pcie_start_link(struct dw_pcie *pci) static int imx6_pcie_host_init(struct pcie_port *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + struct device *dev = pci->dev; struct imx6_pcie *imx6_pcie = to_imx6_pcie(pci); + int ret; imx6_pcie_assert_core_reset(imx6_pcie); imx6_pcie_init_phy(imx6_pcie); - imx6_pcie_deassert_core_reset(imx6_pcie); + ret = imx6_pcie_deassert_core_reset(imx6_pcie); + if (ret < 0) { + dev_err(dev, "pcie host init failed: %d.\n", ret); + return ret; + } + imx6_setup_phy_mpll(imx6_pcie); return 0;