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/spi/altera_spi.c b/drivers/spi/altera_spi.c
index bf1add81fe..4506e2741d 100644
--- a/drivers/spi/altera_spi.c
+++ b/drivers/spi/altera_spi.c
@@ -206,6 +206,7 @@ static int altera_spi_transfer(struct spi_device *spi, struct spi_message *mesg)
 
 static int altera_spi_probe(struct device_d *dev)
 {
+	struct resource *iores;
 	struct spi_master *master;
 	struct altera_spi *altera_spi;
 	struct spi_altera_master *pdata = dev->platform_data;
@@ -221,9 +222,10 @@ static int altera_spi_probe(struct device_d *dev)
 	master->num_chipselect = pdata->num_chipselect;
 	master->bus_num = pdata->bus_num;
 
-	altera_spi->regs = dev_request_mem_region(dev, 0);
-	if (IS_ERR(altera_spi->regs))
-		return PTR_ERR(altera_spi->regs);
+	iores = dev_request_mem_resource(dev, 0);
+	if (IS_ERR(iores))
+		return PTR_ERR(iores);
+	altera_spi->regs = IOMEM(iores->start);
 
 	altera_spi->databits = pdata->databits;
 	altera_spi->speed = pdata->speed;