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/i2c/busses/i2c-designware.c b/drivers/i2c/busses/i2c-designware.c
index a51439f2d5..0b022afd30 100644
--- a/drivers/i2c/busses/i2c-designware.c
+++ b/drivers/i2c/busses/i2c-designware.c
@@ -472,6 +472,7 @@ static int i2c_dw_xfer(struct i2c_adapter *adapter,
 
 static int i2c_dw_probe(struct device_d *pdev)
 {
+	struct resource *iores;
 	struct dw_i2c_dev *dw;
 	struct i2c_platform_data *pdata;
 	int ret, bitrate;
@@ -494,11 +495,12 @@ static int i2c_dw_probe(struct device_d *pdev)
 	dw->adapter.dev.parent = pdev;
 	dw->adapter.dev.device_node = pdev->device_node;
 
-	dw->base = dev_request_mem_region(pdev, 0);
-	if (IS_ERR(dw->base)) {
-		ret = PTR_ERR(dw->base);
+	iores = dev_request_mem_resource(pdev, 0);
+	if (IS_ERR(iores)) {
+		ret = PTR_ERR(iores);
 		goto fail;
 	}
+	dw->base = IOMEM(iores->start);
 
 	ic_comp_type_value = readl(dw->base + DW_IC_COMP_TYPE);
 	if (ic_comp_type_value != DW_IC_COMP_TYPE_VALUE) {