lkml.org 
[lkml]   [2017]   [Nov]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] PCI: keystone: fix interrupt-controller-node lookup
Date
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 <stable@vger.kernel.org> # 3.18
Cc: Murali Karicheri <m-karicheri2@ti.com>
---
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
\
 
 \ /
  Last update: 2017-11-12 13:29    [W:0.083 / U:0.484 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site