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Date:   Tue, 31 Jan 2017 17:54:37 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>
Cc:     Michael Ellerman <mpe@...erman.id.au>,
        Scott Wood <oss@...error.net>,
        Kumar Gala <galak@...nel.crashing.org>,
        Arnd Bergmann <arnd@...db.de>, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] powerpc: make use of for_each_node_by_name() instead of open-coding it

Instead of manually coding the loop with of_find_node_by_name(), let's
switch to the standard macro for iterating over nodes with given name.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 arch/powerpc/platforms/83xx/mpc832x_mds.c | 2 +-
 arch/powerpc/platforms/83xx/mpc832x_rdb.c | 2 +-
 arch/powerpc/platforms/83xx/mpc836x_mds.c | 2 +-
 arch/powerpc/platforms/cell/interrupt.c   | 3 +--
 arch/powerpc/platforms/cell/setup.c       | 3 +--
 arch/powerpc/platforms/cell/spider-pic.c  | 3 +--
 arch/powerpc/platforms/powermac/feature.c | 2 +-
 7 files changed, 7 insertions(+), 10 deletions(-)

diff --git a/arch/powerpc/platforms/83xx/mpc832x_mds.c b/arch/powerpc/platforms/83xx/mpc832x_mds.c
index bb7b25acf26f..1e92f806ee60 100644
--- a/arch/powerpc/platforms/83xx/mpc832x_mds.c
+++ b/arch/powerpc/platforms/83xx/mpc832x_mds.c
@@ -75,7 +75,7 @@ static void __init mpc832x_sys_setup_arch(void)
 		par_io_init(np);
 		of_node_put(np);
 
-		for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;)
+		for_each_node_by_name(np. "ucc")
 			par_io_of_config(np);
 	}
 
diff --git a/arch/powerpc/platforms/83xx/mpc832x_rdb.c b/arch/powerpc/platforms/83xx/mpc832x_rdb.c
index d7c9b186954d..3dcbe06cf36c 100644
--- a/arch/powerpc/platforms/83xx/mpc832x_rdb.c
+++ b/arch/powerpc/platforms/83xx/mpc832x_rdb.c
@@ -204,7 +204,7 @@ static void __init mpc832x_rdb_setup_arch(void)
 		par_io_init(np);
 		of_node_put(np);
 
-		for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;)
+		for_each_node_by_name(np, "ucc")
 			par_io_of_config(np);
 	}
 #endif				/* CONFIG_QUICC_ENGINE */
diff --git a/arch/powerpc/platforms/83xx/mpc836x_mds.c b/arch/powerpc/platforms/83xx/mpc836x_mds.c
index 4fc3051c2b2e..fd44dd03e1f3 100644
--- a/arch/powerpc/platforms/83xx/mpc836x_mds.c
+++ b/arch/powerpc/platforms/83xx/mpc836x_mds.c
@@ -83,7 +83,7 @@ static void __init mpc836x_mds_setup_arch(void)
 		par_io_init(np);
 		of_node_put(np);
 
-		for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;)
+		for_each_node_by_name(np, "ucc")
 			par_io_of_config(np);
 #ifdef CONFIG_QE_USB
 		/* Must fixup Par IO before QE GPIO chips are registered. */
diff --git a/arch/powerpc/platforms/cell/interrupt.c b/arch/powerpc/platforms/cell/interrupt.c
index a6bbbaba14a3..477a1fdd3ee1 100644
--- a/arch/powerpc/platforms/cell/interrupt.c
+++ b/arch/powerpc/platforms/cell/interrupt.c
@@ -315,8 +315,7 @@ static int __init setup_iic(void)
 	struct cbe_iic_regs __iomem *node_iic;
 	const u32 *np;
 
-	for (dn = NULL;
-	     (dn = of_find_node_by_name(dn,"interrupt-controller")) != NULL;) {
+	for_each_node_by_name(dn, "interrupt-controller") {
 		if (!of_device_is_compatible(dn,
 				     "IBM,CBEA-Internal-Interrupt-Controller"))
 			continue;
diff --git a/arch/powerpc/platforms/cell/setup.c b/arch/powerpc/platforms/cell/setup.c
index d3543e68efe8..7d31b8d14661 100644
--- a/arch/powerpc/platforms/cell/setup.c
+++ b/arch/powerpc/platforms/cell/setup.c
@@ -192,8 +192,7 @@ static void __init mpic_init_IRQ(void)
 	struct device_node *dn;
 	struct mpic *mpic;
 
-	for (dn = NULL;
-	     (dn = of_find_node_by_name(dn, "interrupt-controller"));) {
+	for_each_node_by_name(dn, "interrupt-controller") {
 		if (!of_device_is_compatible(dn, "CBEA,platform-open-pic"))
 			continue;
 
diff --git a/arch/powerpc/platforms/cell/spider-pic.c b/arch/powerpc/platforms/cell/spider-pic.c
index ff924af00e78..a0454b031e6f 100644
--- a/arch/powerpc/platforms/cell/spider-pic.c
+++ b/arch/powerpc/platforms/cell/spider-pic.c
@@ -343,8 +343,7 @@ void __init spider_init_IRQ(void)
 	 * device-tree is bogus anyway) so all we can do is pray or maybe test
 	 * the address and deduce the node-id
 	 */
-	for (dn = NULL;
-	     (dn = of_find_node_by_name(dn, "interrupt-controller"));) {
+	for_each_node_by_name(dn, "interrupt-controller") {
 		if (of_device_is_compatible(dn, "CBEA,platform-spider-pic")) {
 			if (of_address_to_resource(dn, 0, &r)) {
 				printk(KERN_WARNING "spider-pic: Failed\n");
diff --git a/arch/powerpc/platforms/powermac/feature.c b/arch/powerpc/platforms/powermac/feature.c
index 730e48111848..86ce02f15593 100644
--- a/arch/powerpc/platforms/powermac/feature.c
+++ b/arch/powerpc/platforms/powermac/feature.c
@@ -2641,7 +2641,7 @@ static void __init probe_one_macio(const char *name, const char *compat, int typ
 	phys_addr_t		addr;
 	u64			size;
 
-	for (node = NULL; (node = of_find_node_by_name(node, name)) != NULL;) {
+	for_each_node_by_name(node, name) {
 		if (!compat)
 			break;
 		if (of_device_is_compatible(node, compat))
-- 
2.11.0.483.g087da7b7c-goog

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