of_pci: use of_property_read_u32()

of_get_pci_domain_nr() somehow didn't use of_property_read_u32() though it
was long available, basically open-coding it. Using the modern DT API saves
several LoCs/bytes and also adds some prop sanity checks as a bonus...

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Rob Herring <robh@kernel.org>

1 files changed, 6 insertions, 9 deletions

diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c
index 3d4cb7090878..0162e4ba30e2 100644
--- a/drivers/of/of_pci.c
+++ b/drivers/of/of_pci.c
@@ -105,17 +105,14 @@ EXPORT_SYMBOL_GPL(of_pci_parse_bus_range);
  */
 int of_get_pci_domain_nr(struct device_node *node)
 {
-        const __be32 *value;
-        int len;
-        u16 domain;
-
-        value = of_get_property(node, "linux,pci-domain", &len);
-        if (!value || len < sizeof(*value))
-                return -EINVAL;
+        u32 domain;
+        int error;
 
-        domain = (u16)be32_to_cpup(value);
+        error = of_property_read_u32(node, "linux,pci-domain", &domain);
+        if (error)
+                return error;
 
-        return domain;
+        return (u16)domain;
 }
 EXPORT_SYMBOL_GPL(of_get_pci_domain_nr);