From 3bd69ad077a955b469baa90d938fd83510297335 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Thu, 18 Feb 2016 11:38:58 +0100
Subject: driver: replace dev_request_mem_region with dev_request_mem_resource

dev_request_mem_region doesn't work properly one some SoCs on which
PTR_ERR() values clash with valid return values from dev_request_mem_region.
Replace them with dev_request_mem_resource where possible.

This patch has been generated with the following semantic patch:

// <smpl>
@@
expression d;
expression n;
expression io;
identifier func;
@@
func(...) {
+struct resource *iores;
<+...
-io = dev_request_mem_region(d, n);
-if (IS_ERR(io)) {
+iores = dev_request_mem_resource(d, n);
+if (IS_ERR(iores)) {
...
-	return PTR_ERR(io);
-}
+	return PTR_ERR(iores);
+}
+io = IOMEM(iores->start);
...+>
}

@@
expression d;
expression n;
expression io;
identifier func;
@@
func(...) {
+struct resource *iores;
<+...
-io = dev_request_mem_region(d, n);
-if (IS_ERR(io)) {
+iores = dev_request_mem_resource(d, n);
+if (IS_ERR(iores))
-	return PTR_ERR(io);
-}
+	return PTR_ERR(iores);
+io = IOMEM(iores->start);
...+>
}

@@
expression d;
expression n;
expression io;
identifier func;
@@
func(...) {
+struct resource *iores;
<+...
-io = dev_request_mem_region(d, n);
-if (IS_ERR(io)) {
-	ret = PTR_ERR(io);
+iores = dev_request_mem_resource(d, n);
+if (IS_ERR(iores)) {
+	ret = PTR_ERR(iores);
...
}
+io = IOMEM(iores->start);
...+>
}

@@
expression d;
expression n;
expression io;
identifier func;
@@
func(...) {
+struct resource *iores;
<+...
-io = dev_request_mem_region(d, n);
+iores = dev_request_mem_resource(d, n);
+if (IS_ERR(iores))
+	return PTR_ERR(iores);
+io = IOMEM(iores->start);
...+>
}

@@
identifier func;
@@
func(...) {
<+...
struct resource *iores;
-struct resource *iores;
...+>
}
// </smpl>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/watchdog/jz4740.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

(limited to 'drivers/watchdog/jz4740.c')

diff --git a/drivers/watchdog/jz4740.c b/drivers/watchdog/jz4740.c
index 85a1c1d1e9..f28bb9177a 100644
--- a/drivers/watchdog/jz4740.c
+++ b/drivers/watchdog/jz4740.c
@@ -67,14 +67,16 @@ static void __noreturn jz4740_reset_soc(struct restart_handler *rst)
 
 static int jz4740_wdt_probe(struct device_d *dev)
 {
+	struct resource *iores;
 	struct jz4740_wdt_drvdata *priv;
 
 	priv = xzalloc(sizeof(struct jz4740_wdt_drvdata));
-	priv->base = dev_request_mem_region(dev, 0);
-	if (IS_ERR(priv->base)) {
+	iores = dev_request_mem_resource(dev, 0);
+	if (IS_ERR(iores)) {
 		dev_err(dev, "could not get memory region\n");
-		return PTR_ERR(priv->base);
+		return PTR_ERR(iores);
 	}
+	priv->base = IOMEM(iores->start);
 
 	dev->priv = priv;
 
-- 
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