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, 9 insertions, 2 deletions

diff --git a/drivers/mtd/spi-nor/cadence-quadspi.c b/drivers/mtd/spi-nor/cadence-quadspi.c
index ff7bb7a5d8..680f30f707 100644
--- a/drivers/mtd/spi-nor/cadence-quadspi.c
+++ b/drivers/mtd/spi-nor/cadence-quadspi.c
@@ -1109,6 +1109,7 @@ static void cqspi_controller_init(struct cqspi_st *cqspi)
 
 static int cqspi_probe(struct device_d *dev)
 {
+	struct resource *iores;
 	struct device_node *np = dev->device_node;
 	struct cqspi_st *cqspi;
 	struct cadence_qspi_platform_data *pdata = dev->platform_data;
@@ -1142,14 +1143,20 @@ static int cqspi_probe(struct device_d *dev)
 
 	clk_enable(cqspi->qspi_clk);
 
-	cqspi->iobase = dev_request_mem_region(dev, 0);
+	iores = dev_request_mem_resource(dev, 0);
+	if (IS_ERR(iores))
+		return PTR_ERR(iores);
+	cqspi->iobase = IOMEM(iores->start);
 	if (IS_ERR(cqspi->iobase)) {
 		dev_err(dev, "dev_request_mem_region 0 failed\n");
 		ret = PTR_ERR(cqspi->iobase);
 		goto probe_failed;
 	}
 
-	cqspi->ahb_base = dev_request_mem_region(dev, 1);
+	iores = dev_request_mem_resource(dev, 1);
+	if (IS_ERR(iores))
+		return PTR_ERR(iores);
+	cqspi->ahb_base = IOMEM(iores->start);
 	if (IS_ERR(cqspi->ahb_base)) {
 		dev_err(dev, "dev_request_mem_region 0 failed\n");
 		ret = PTR_ERR(cqspi->ahb_base);