ARM: OMAP2+: hwmod: consolidate finding the MPU port index and storing it

From: Paul Walmsley <paul@pwsan.com>

An IP block's MPU interface port only needs to be found once.  The result
can be cached to speed further lookups.  This patch consolidates these
two steps into a single function.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoît Cousson <b-cousson@ti.com>
---
 arch/arm/mach-omap2/omap_hwmod.c |   39 +++++++++++++++-----------------------
 1 files changed, 15 insertions(+), 24 deletions(-)

diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index 4d62231..ae72432 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -1045,37 +1045,34 @@ static int _get_addr_space_by_name(struct omap_hwmod *oh, const char *name,
 }
 
 /**
- * _find_mpu_port_index - find hwmod OCP slave port ID intended for MPU use
+ * _save_mpu_port_index - find and save the index to @oh's MPU port
  * @oh: struct omap_hwmod *
  *
- * Returns the array index of the OCP slave port that the MPU
- * addresses the device on, or -EINVAL upon error or not found.
+ * Determines the array index of the OCP slave port that the MPU uses
+ * to address the device, and saves it into the struct omap_hwmod.
+ * Intended to be called during hwmod registration only. No return
+ * value.
  */
-static int __init _find_mpu_port_index(struct omap_hwmod *oh)
+static void __init _save_mpu_port_index(struct omap_hwmod *oh)
 {
-	struct omap_hwmod_ocp_if *os;
+	struct omap_hwmod_ocp_if *os = NULL;
 	int i = 0;
-	int found = 0;
 
 	if (!oh)
-		return -EINVAL;
+		return;
+
+	oh->_int_flags |= _HWMOD_NO_MPU_PORT;
 
 	while (i < oh->slaves_cnt) {
 		os = _fetch_next_ocp_if(NULL, oh->slaves, &i);
 		if (os->user & OCP_USER_MPU) {
-			found = 1;
+			oh->_mpu_port_index = i - 1;
+			oh->_int_flags &= ~_HWMOD_NO_MPU_PORT;
 			break;
 		}
 	}
 
-	if (found)
-		pr_debug("omap_hwmod: %s: MPU OCP slave port ID  %d\n",
-			 oh->name, i - 1);
-	else
-		pr_debug("omap_hwmod: %s: no MPU OCP slave port found\n",
-			 oh->name);
-
-	return (found) ? (i - 1) : -EINVAL;
+	return;
 }
 
 /**
@@ -1113,7 +1110,7 @@ static struct omap_hwmod_addr_space * __init _find_mpu_rt_addr_space(struct omap
 	int found = 0, i = 0;
 
 	os = _find_mpu_rt_port(oh);
-	if (!os->addr)
+	if (!os || !os->addr)
 		return NULL;
 
 	do {
@@ -2176,8 +2173,6 @@ static int __init _setup(struct omap_hwmod *oh, void *n)
  */
 static int __init _register(struct omap_hwmod *oh)
 {
-	int ms_id;
-
 	if (!oh || !oh->name || !oh->class || !oh->class->name ||
 	    (oh->_state != _HWMOD_STATE_UNKNOWN))
 		return -EINVAL;
@@ -2187,11 +2182,7 @@ static int __init _register(struct omap_hwmod *oh)
 	if (_lookup(oh->name))
 		return -EEXIST;
 
-	ms_id = _find_mpu_port_index(oh);
-	if (!IS_ERR_VALUE(ms_id))
-		oh->_mpu_port_index = ms_id;
-	else
-		oh->_int_flags |= _HWMOD_NO_MPU_PORT;
+	_save_mpu_port_index(oh);
 
 	list_add_tail(&oh->node, &omap_hwmod_list);