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, 10 insertions, 7 deletions

diff --git a/drivers/mtd/nand/nand_mxs.c b/drivers/mtd/nand/nand_mxs.c
index 7635e2a418..20bda14b62 100644
--- a/drivers/mtd/nand/nand_mxs.c
+++ b/drivers/mtd/nand/nand_mxs.c
@@ -1274,6 +1274,7 @@ static void mxs_nand_probe_dt(struct device_d *dev, struct mxs_nand_info *nand_i
 
 static int mxs_nand_probe(struct device_d *dev)
 {
+	struct resource *iores;
 	struct mxs_nand_info *nand_info;
 	struct nand_chip *nand;
 	struct mtd_info *mtd;
@@ -1293,13 +1294,15 @@ static int mxs_nand_probe(struct device_d *dev)
 	mxs_nand_probe_dt(dev, nand_info);
 
 	nand_info->type = type;
-	nand_info->io_base = dev_request_mem_region(dev, 0);
-	if (IS_ERR(nand_info->io_base))
-		return PTR_ERR(nand_info->io_base);
-
-	nand_info->bch_base = dev_request_mem_region(dev, 1);
-	if (IS_ERR(nand_info->bch_base))
-		return PTR_ERR(nand_info->bch_base);
+	iores = dev_request_mem_resource(dev, 0);
+	if (IS_ERR(iores))
+		return PTR_ERR(iores);
+	nand_info->io_base = IOMEM(iores->start);
+
+	iores = dev_request_mem_resource(dev, 1);
+	if (IS_ERR(iores))
+		return PTR_ERR(iores);
+	nand_info->bch_base = IOMEM(iores->start);
 
 	nand_info->clk = clk_get(dev, NULL);
 	if (IS_ERR(nand_info->clk))