hdata/memory: Remove find_shared()

This helper function is used to check if the node we are about to create
already exists. There's no real need for this considering we already
have perfectly functional methods for searching the device-tree, so drop
it in favour of the more standard dt_find_name_addr().

Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>

hdata/memory.c

@@ -68,32 +68,6 @@ struct HDIF_ms_area_id {
 	__be16 share_id;
 } __packed;
 
-static struct dt_node *find_shared(struct dt_node *root, u16 id, u64 start, u64 len)
-{
-	struct dt_node *i;
-
-	for (i = dt_first(root); i; i = dt_next(root, i)) {
-		__be64 reg[2];
-		const struct dt_property *shared, *type, *region;
-
-		type = dt_find_property(i, "device_type");
-		if (!type || strcmp(type->prop, "memory") != 0)
-			continue;
-
-		shared = dt_find_property(i, DT_PRIVATE "share-id");
-		if (!shared || fdt32_to_cpu(*(u32 *)shared->prop) != id)
-			continue;
-
-		region = dt_find_property(i, "reg");
-		if (!region)
-			continue;
-		memcpy(reg, region->prop, sizeof(reg));
-		if (be64_to_cpu(reg[0]) == start && be64_to_cpu(reg[1]) == len)
-			break;
-	}
-	return i;
-}
-
 static void append_chip_id(struct dt_node *mem, u32 id)
 {
 	struct dt_property *prop;
@@ -123,13 +97,8 @@ static bool add_address_range(struct dt_node *root,
 			      const struct HDIF_ms_area_address_range *arange)
 {
 	struct dt_node *mem;
+	u32 chip_id, type;
 	u64 reg[2];
-	char *name;
-	u32 chip_id;
-	size_t namesz = sizeof("memory@") + STR_MAX_CHARS(reg[0]);
-
-	name = (char*)malloc(namesz);
-	assert(name);
 
 	chip_id = pcid_to_chip_id(be32_to_cpu(arange->chip));
 
@@ -144,27 +113,21 @@ static bool add_address_range(struct dt_node *root,
 	reg[1] = cleanup_addr(be64_to_cpu(arange->end)) - reg[0];
 
 	if (be16_to_cpu(id->flags) & MS_AREA_SHARED) {
-		/* Only enter shared nodes once. */ 
-		mem = find_shared(root, be16_to_cpu(id->share_id),
-				  reg[0], reg[1]);
+		mem = dt_find_by_name_addr("memory", reg[0]);
 		if (mem) {
 			append_chip_id(mem, chip_id);
-			free(name);
 			return true;
 		}
 	}
-	snprintf(name, namesz, "memory@%llx", (long long)reg[0]);
 
-	mem = dt_new(root, name);
+	mem = dt_new_addr(root, name, reg[0]);
 	dt_add_property_string(mem, "device_type", "memory");
 	dt_add_property_cells(mem, "ibm,chip-id", chip_id);
 	dt_add_property_u64s(mem, "reg", reg[0], reg[1]);
 	if (be16_to_cpu(id->flags) & MS_AREA_SHARED)
 		dt_add_property_cells(mem, DT_PRIVATE "share-id",
 				      be16_to_cpu(id->share_id));
 
-	free(name);
-
 	return true;
 }