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/clocksource/digic.c b/drivers/clocksource/digic.c
index 277bb02b63..1ecd839160 100644
--- a/drivers/clocksource/digic.c
+++ b/drivers/clocksource/digic.c
@@ -40,15 +40,17 @@ static struct clocksource digic_cs = {
 
 static int digic_timer_probe(struct device_d *dev)
 {
+	struct resource *iores;
 	/* use only one timer */
 	if (timer_base)
 		return -EBUSY;
 
-	timer_base = dev_request_mem_region(dev, 0);
-	if (IS_ERR(timer_base)) {
+	iores = dev_request_mem_resource(dev, 0);
+	if (IS_ERR(iores)) {
 		dev_err(dev, "could not get memory region\n");
-		return PTR_ERR(timer_base);
+		return PTR_ERR(iores);
 	}
+	timer_base = IOMEM(iores->start);
 
 	clocks_calc_mult_shift(&digic_cs.mult, &digic_cs.shift,
 		DIGIC_TIMER_CLOCK, NSEC_PER_SEC, 1);