[PATCH] drivers: of: fix resources freeing in of_pci_get_host_bridge_resources()

[Lorenzo Pieralisi]

In the function of_pci_get_host_bridge_resources() if the parsing of
ranges fails, previously allocated resources inclusive of bus_range
are not freed and are not expected to be freed by the function caller
on error return.

This patch fixes the issues by adding code that properly frees resources
and bus_range before exiting the function with an error return value.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi at arm.com>
Acked-by: Liviu Dudau <liviu.dudau at arm.com>
Cc: Arnd Bergmann <arnd at arndb.de>
Cc: Bjorn Helgaas <bhelgaas at google.com>
Cc: Rob Herring <robh+dt at kernel.org>
---
 drivers/of/of_pci.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c
index 88471d3..60dc36c 100644
--- a/drivers/of/of_pci.c
+++ b/drivers/of/of_pci.c
@@ -140,6 +140,7 @@ int of_pci_get_host_bridge_resources(struct device_node *dev,
 			unsigned char busno, unsigned char bus_max,
 			struct list_head *resources, resource_size_t *io_base)
 {
+	struct pci_host_bridge_window *window;
 	struct resource *res;
 	struct resource *bus_range;
 	struct of_pci_range range;
@@ -225,7 +226,10 @@ int of_pci_get_host_bridge_resources(struct device_node *dev,
 conversion_failed:
 	kfree(res);
 parse_failed:
+	list_for_each_entry(window, resources, list)
+		kfree(window->res);
 	pci_free_resource_list(resources);
+	kfree(bus_range);
 	return err;
 }
 EXPORT_SYMBOL_GPL(of_pci_get_host_bridge_resources);
-- 
2.2.1