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>

1 files changed, 5 insertions, 3 deletions

diff --git a/drivers/net/arc_emac.c b/drivers/net/arc_emac.c
index 3dc54cd22b..2155349e21 100644
--- a/drivers/net/arc_emac.c
+++ b/drivers/net/arc_emac.c
@@ -391,6 +391,7 @@ static int arc_emac_mdio_write(struct mii_bus *bus, int phy_addr, int reg_num,
 
 static int arc_emac_probe(struct device_d *dev)
 {
+	struct resource *iores;
 	struct eth_device *edev;
 	struct arc_emac_priv *priv;
 	unsigned long clock_frequency;
@@ -406,9 +407,10 @@ static int arc_emac_probe(struct device_d *dev)
 	miibus = xzalloc(sizeof(struct mii_bus));
 
 	priv = edev->priv;
-	priv->regs = dev_request_mem_region(dev, 0);
-	if (IS_ERR(priv->regs))
-		return PTR_ERR(priv->regs);
+	iores = dev_request_mem_resource(dev, 0);
+	if (IS_ERR(iores))
+		return PTR_ERR(iores);
+	priv->regs = IOMEM(iores->start);
 	priv->bus = miibus;
 
 	priv->clk = clk_get(dev, "hclk");