From patchwork Thu Nov 12 13:48:45 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jisheng Zhang X-Patchwork-Id: 7602451 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id AD44ABF90C for ; Thu, 12 Nov 2015 13:54:58 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9020220611 for ; Thu, 12 Nov 2015 13:54:57 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7F13D20601 for ; Thu, 12 Nov 2015 13:54:56 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZwsJ6-00030k-Os; Thu, 12 Nov 2015 13:52:56 +0000 Received: from mx0a-0016f401.pphosted.com ([67.231.148.174]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZwsJ2-0002we-Mz for linux-arm-kernel@lists.infradead.org; Thu, 12 Nov 2015 13:52:53 +0000 Received: from pps.filterd (m0045849.ppops.net [127.0.0.1]) by mx0a-0016f401.pphosted.com (8.15.0.59/8.15.0.59) with SMTP id tACDp2aT023930; Thu, 12 Nov 2015 05:52:27 -0800 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-0016f401.pphosted.com with ESMTP id 1y3t4wvv12-1 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 12 Nov 2015 05:52:27 -0800 Received: from m0045849.ppops.net (m0045849.ppops.net [127.0.0.1]) by pps.reinject (8.15.0.59/8.15.0.59) with SMTP id tACDqQch024884; Thu, 12 Nov 2015 05:52:26 -0800 Received: from sc-exch04.marvell.com ([199.233.58.184]) by mx0a-0016f401.pphosted.com with ESMTP id 1y3t4wvv0w-1 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Thu, 12 Nov 2015 05:52:26 -0800 Received: from SC-EXCH03.marvell.com (10.93.176.83) by SC-EXCH04.marvell.com (10.93.176.84) with Microsoft SMTP Server (TLS) id 15.0.1044.25; Thu, 12 Nov 2015 05:52:25 -0800 Received: from maili.marvell.com (10.93.176.43) by SC-EXCH03.marvell.com (10.93.176.83) with Microsoft SMTP Server id 15.0.1044.25 via Frontend Transport; Thu, 12 Nov 2015 05:52:25 -0800 Received: from xhacker.marvell.com (unknown [10.37.135.134]) by maili.marvell.com (Postfix) with ESMTP id E559D3F703F; Thu, 12 Nov 2015 05:52:22 -0800 (PST) From: Jisheng Zhang To: , , , , , , , , , , , Subject: [PATCH] PCI: designware: bail out if host_init failed Date: Thu, 12 Nov 2015 21:48:45 +0800 Message-ID: <1447336125-5010-1-git-send-email-jszhang@marvell.com> X-Mailer: git-send-email 2.6.2 MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2015-11-12_06:, , signatures=0 X-Proofpoint-Spam-Details: rule=inbound_notspam policy=inbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1507310000 definitions=main-1511120227 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20151112_055252_771239_182C6922 X-CRM114-Status: GOOD ( 15.84 ) X-Spam-Score: -2.6 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jisheng Zhang , linux-samsung-soc@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP There's no reason to continue the initialization such as configure register, scan root bus etc. if customized host_init() failed. This patch tries to check the host_init result, bail out if failed. Signed-off-by: Jisheng Zhang --- drivers/pci/host/pci-dra7xx.c | 4 +++- drivers/pci/host/pci-exynos.c | 4 +++- drivers/pci/host/pci-imx6.c | 4 +++- drivers/pci/host/pci-keystone.c | 4 +++- drivers/pci/host/pci-layerscape.c | 25 ++++++++++++++++--------- drivers/pci/host/pcie-designware.c | 7 +++++-- drivers/pci/host/pcie-designware.h | 2 +- drivers/pci/host/pcie-spear13xx.c | 4 +++- 8 files changed, 37 insertions(+), 17 deletions(-) diff --git a/drivers/pci/host/pci-dra7xx.c b/drivers/pci/host/pci-dra7xx.c index 8c36880..b3160a1 100644 --- a/drivers/pci/host/pci-dra7xx.c +++ b/drivers/pci/host/pci-dra7xx.c @@ -149,7 +149,7 @@ static void dra7xx_pcie_enable_interrupts(struct pcie_port *pp) LEG_EP_INTERRUPTS); } -static void dra7xx_pcie_host_init(struct pcie_port *pp) +static int dra7xx_pcie_host_init(struct pcie_port *pp) { dw_pcie_setup_rc(pp); @@ -162,6 +162,8 @@ static void dra7xx_pcie_host_init(struct pcie_port *pp) if (IS_ENABLED(CONFIG_PCI_MSI)) dw_pcie_msi_init(pp); dra7xx_pcie_enable_interrupts(pp); + + return 0; } static struct pcie_host_ops dra7xx_pcie_host_ops = { diff --git a/drivers/pci/host/pci-exynos.c b/drivers/pci/host/pci-exynos.c index 01095e1..57f370b 100644 --- a/drivers/pci/host/pci-exynos.c +++ b/drivers/pci/host/pci-exynos.c @@ -481,10 +481,12 @@ static int exynos_pcie_link_up(struct pcie_port *pp) return 0; } -static void exynos_pcie_host_init(struct pcie_port *pp) +static int exynos_pcie_host_init(struct pcie_port *pp) { exynos_pcie_establish_link(pp); exynos_pcie_enable_interrupts(pp); + + return 0; } static struct pcie_host_ops exynos_pcie_host_ops = { diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c index 22e8224..9a46680 100644 --- a/drivers/pci/host/pci-imx6.c +++ b/drivers/pci/host/pci-imx6.c @@ -425,7 +425,7 @@ static int imx6_pcie_establish_link(struct pcie_port *pp) return 0; } -static void imx6_pcie_host_init(struct pcie_port *pp) +static int imx6_pcie_host_init(struct pcie_port *pp) { imx6_pcie_assert_core_reset(pp); @@ -439,6 +439,8 @@ static void imx6_pcie_host_init(struct pcie_port *pp) if (IS_ENABLED(CONFIG_PCI_MSI)) dw_pcie_msi_init(pp); + + return 0; } static void imx6_pcie_reset_phy(struct pcie_port *pp) diff --git a/drivers/pci/host/pci-keystone.c b/drivers/pci/host/pci-keystone.c index 0aa81bd..2604571 100644 --- a/drivers/pci/host/pci-keystone.c +++ b/drivers/pci/host/pci-keystone.c @@ -250,7 +250,7 @@ static int keystone_pcie_fault(unsigned long addr, unsigned int fsr, return 0; } -static void __init ks_pcie_host_init(struct pcie_port *pp) +static int __init ks_pcie_host_init(struct pcie_port *pp) { struct keystone_pcie *ks_pcie = to_keystone_pcie(pp); u32 val; @@ -277,6 +277,8 @@ static void __init ks_pcie_host_init(struct pcie_port *pp) */ hook_fault_code(17, keystone_pcie_fault, SIGBUS, 0, "Asynchronous external abort"); + + return 0; } static struct pcie_host_ops keystone_pcie_host_ops = { diff --git a/drivers/pci/host/pci-layerscape.c b/drivers/pci/host/pci-layerscape.c index 3923bed..a6e9070 100644 --- a/drivers/pci/host/pci-layerscape.c +++ b/drivers/pci/host/pci-layerscape.c @@ -94,8 +94,9 @@ static int ls1021_pcie_link_up(struct pcie_port *pp) return 1; } -static void ls1021_pcie_host_init(struct pcie_port *pp) +static int ls1021_pcie_host_init(struct pcie_port *pp) { + int ret; struct ls_pcie *pcie = to_ls_pcie(pp); u32 val, index[2]; @@ -103,15 +104,14 @@ static void ls1021_pcie_host_init(struct pcie_port *pp) "fsl,pcie-scfg"); if (IS_ERR(pcie->scfg)) { dev_err(pp->dev, "No syscfg phandle specified\n"); - pcie->scfg = NULL; - return; + ret = PTR_ERR(pcie->scfg); + goto err; } - if (of_property_read_u32_array(pp->dev->of_node, - "fsl,pcie-scfg", index, 2)) { - pcie->scfg = NULL; - return; - } + ret = of_property_read_u32_array(pp->dev->of_node, + "fsl,pcie-scfg", index, 2); + if (ret) + goto err; pcie->index = index[1]; dw_pcie_setup_rc(pp); @@ -123,6 +123,11 @@ static void ls1021_pcie_host_init(struct pcie_port *pp) val = ioread32(pcie->dbi + PCIE_STRFMR1); val &= 0xffff; iowrite32(val, pcie->dbi + PCIE_STRFMR1); + + return 0; +err: + pcie->scfg = NULL; + return ret; } static int ls_pcie_link_up(struct pcie_port *pp) @@ -140,7 +145,7 @@ static int ls_pcie_link_up(struct pcie_port *pp) return 1; } -static void ls_pcie_host_init(struct pcie_port *pp) +static int ls_pcie_host_init(struct pcie_port *pp) { struct ls_pcie *pcie = to_ls_pcie(pp); @@ -148,6 +153,8 @@ static void ls_pcie_host_init(struct pcie_port *pp) ls_pcie_fix_class(pcie); ls_pcie_clear_multifunction(pcie); iowrite32(0, pcie->dbi + PCIE_DBI_RO_WR_EN); + + return 0; } static int ls_pcie_msi_host_init(struct pcie_port *pp, diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c index 540f077..a80a9ba 100644 --- a/drivers/pci/host/pcie-designware.c +++ b/drivers/pci/host/pcie-designware.c @@ -515,8 +515,11 @@ int dw_pcie_host_init(struct pcie_port *pp) } } - if (pp->ops->host_init) - pp->ops->host_init(pp); + if (pp->ops->host_init) { + ret = pp->ops->host_init(pp); + if (ret) + return ret; + } if (!pp->ops->rd_other_conf) dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1, diff --git a/drivers/pci/host/pcie-designware.h b/drivers/pci/host/pcie-designware.h index 2356d29..7b5317f 100644 --- a/drivers/pci/host/pcie-designware.h +++ b/drivers/pci/host/pcie-designware.h @@ -63,7 +63,7 @@ struct pcie_host_ops { int (*wr_other_conf)(struct pcie_port *pp, struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val); int (*link_up)(struct pcie_port *pp); - void (*host_init)(struct pcie_port *pp); + int (*host_init)(struct pcie_port *pp); void (*msi_set_irq)(struct pcie_port *pp, int irq); void (*msi_clear_irq)(struct pcie_port *pp, int irq); phys_addr_t (*get_msi_addr)(struct pcie_port *pp); diff --git a/drivers/pci/host/pcie-spear13xx.c b/drivers/pci/host/pcie-spear13xx.c index b95b756..50b3b31 100644 --- a/drivers/pci/host/pcie-spear13xx.c +++ b/drivers/pci/host/pcie-spear13xx.c @@ -256,10 +256,12 @@ static int spear13xx_pcie_link_up(struct pcie_port *pp) return 0; } -static void spear13xx_pcie_host_init(struct pcie_port *pp) +static int spear13xx_pcie_host_init(struct pcie_port *pp) { spear13xx_pcie_establish_link(pp); spear13xx_pcie_enable_interrupts(pp); + + return 0; } static struct pcie_host_ops spear13xx_pcie_host_ops = {