sparc: Fix handling of LANCE and ESP parent nodes in of_device.c

The device nodes that sit above 'esp' and 'le' on SBUS lack a 'ranges'
property, but we should pass the translation up to the parent node so
that the SBUS level ranges get applied.

Based upon a bug report from Robert Reif.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 10 insertions, 1 deletions

diff --git a/arch/sparc64/kernel/of_device.c b/arch/sparc64/kernel/of_device.c
index e427086e3b58..c15bcdf75c0d 100644
--- a/arch/sparc64/kernel/of_device.c
+++ b/arch/sparc64/kernel/of_device.c
@@ -438,8 +438,17 @@ static int __init use_1to1_mapping(struct device_node *pp)
 
         /* If the parent is the dma node of an ISA bus, pass
          * the translation up to the root.
+         *
+         * Some SBUS devices use intermediate nodes to express
+         * hierarchy within the device itself.  These aren't
+         * real bus nodes, and don't have a 'ranges' property.
+         * But, we should still pass the translation work up
+         * to the SBUS itself.
          */
-        if (!strcmp(pp->name, "dma"))
+        if (!strcmp(pp->name, "dma") ||
+            !strcmp(pp->name, "espdma") ||
+            !strcmp(pp->name, "ledma") ||
+            !strcmp(pp->name, "lebuffer"))
                 return 0;
 
         /* Similarly for all PCI bridges, if we get this far