From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-f68.google.com ([209.85.215.68]:51058 "EHLO mail-lf0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751186AbdKLM3A (ORCPT ); Sun, 12 Nov 2017 07:29:00 -0500 From: Johan Hovold To: Murali Karicheri Cc: Lorenzo Pieralisi , Bjorn Helgaas , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Johan Hovold , stable Subject: [PATCH] PCI: keystone: fix interrupt-controller-node lookup Date: Sun, 12 Nov 2017 13:28:50 +0100 Message-Id: <20171112122850.30804-1-johan@kernel.org> Sender: linux-pci-owner@vger.kernel.org List-ID: Fix child-node lookup during initialisation, which ended up searching the whole device tree depth-first starting at the parent rather than just matching on its children. To make things worse, the parent pci node was prematurely freed, while the child interrupt-controller node was leaked. Fixes: 0c4ffcfe1fbc ("PCI: keystone: Add TI Keystone PCIe driver") Cc: stable # 3.18 Cc: Murali Karicheri --- drivers/pci/dwc/pci-keystone.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/pci/dwc/pci-keystone.c b/drivers/pci/dwc/pci-keystone.c index 5bee3af47588..39405598b22d 100644 --- a/drivers/pci/dwc/pci-keystone.c +++ b/drivers/pci/dwc/pci-keystone.c @@ -178,7 +178,7 @@ static int ks_pcie_get_irq_controller_info(struct keystone_pcie *ks_pcie, } /* interrupt controller is in a child node */ - *np_temp = of_find_node_by_name(np_pcie, controller); + *np_temp = of_get_child_by_name(np_pcie, controller); if (!(*np_temp)) { dev_err(dev, "Node for %s is absent\n", controller); return -EINVAL; @@ -187,6 +187,7 @@ static int ks_pcie_get_irq_controller_info(struct keystone_pcie *ks_pcie, temp = of_irq_count(*np_temp); if (!temp) { dev_err(dev, "No IRQ entries in %s\n", controller); + of_node_put(*np_temp); return -EINVAL; } @@ -204,6 +205,8 @@ static int ks_pcie_get_irq_controller_info(struct keystone_pcie *ks_pcie, break; } + of_node_put(*np_temp); + if (temp) { *num_irqs = temp; return 0; -- 2.15.0