[PATCH] driver: have dev_platform_ioremap_resource return error pointer

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

From: Ahmad Fatoum <a.fatoum@barebox.org>

devm_request_mem_region doesn't return NULL on error on Linux and thus
it should neither in barebox. Fix this.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 drivers/base/driver.c  | 2 ++
 include/linux/device.h | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index edba037fa2dd..4e361a96c9ee 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -587,6 +587,8 @@ void __iomem *dev_request_mem_region(struct device *dev, int num)
 	struct resource *res;
 
 	res = dev_request_mem_resource(dev, num);
+	if (!IS_ERR(res) && WARN_ON(IS_ERR_VALUE(res->start)))
+		return IOMEM_ERR_PTR(res->start);
 	if (IS_ERR(res))
 		return ERR_CAST(res);
 
diff --git a/include/linux/device.h b/include/linux/device.h
index 66294910abb3..661d8b24730e 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -39,7 +39,7 @@ static inline void __iomem *dev_platform_ioremap_resource(struct device *dev,
 	 * so we don't need to do anything besides requesting the regions
 	 * and can leave the memory attributes unchanged.
 	 */
-	return dev_request_mem_region_err_null(dev, resource);
+	return dev_request_mem_region(dev, resource);
 }
 
 static inline void __iomem *devm_ioremap(struct device *dev,
-- 
2.39.5