[PATCH] OF: PCI: Fix creation of mem-mapped pci host bridges

[Robert Richter]

The pci host bridge was not created if io_base was not set when
calling of_pci_get_host_bridge_resources(). This is esp. the case for
mem-mapped io (IORESOURCE_MEM). This patch fixes this. Function
parameter io_base is optional now.

Signed-off-by: Robert Richter <rrichter@xxxxxxxxxx>
---
 drivers/of/of_pci.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c
index ffdb45ed8682..1f0e7c2505ee 100644
--- a/drivers/of/of_pci.c
+++ b/drivers/of/of_pci.c
@@ -182,9 +182,8 @@ int of_pci_get_host_bridge_resources(struct device_node *dev,
 	char range_type[4];
 	int err;
 
-	if (!io_base)
-		return -EINVAL;
-	*io_base = OF_BAD_ADDR;
+	if (io_base)
+		*io_base = OF_BAD_ADDR;
 
 	bus_range = kzalloc(sizeof(*bus_range), GFP_KERNEL);
 	if (!bus_range)
@@ -242,7 +241,7 @@ int of_pci_get_host_bridge_resources(struct device_node *dev,
 			goto parse_failed;
 		}
 
-		if (resource_type(res) == IORESOURCE_IO) {
+		if (io_base && resource_type(res) == IORESOURCE_IO) {
 			if (*io_base != OF_BAD_ADDR)
 				pr_warn("More than one I/O resource converted. CPU offset for old range lost!\n");
 			*io_base = range.cpu_addr;
-- 
2.1.0

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