[PATCH 1/7] drivers: of: add return value to of_reserved_mem_device_init

From: Marek Szyprowski
Date: Tue Aug 26 2014 - 08:15:59 EST


Driver calling of_reserved_mem_device_init() might be interested if the
initialization has been successful or not, so add support for returning
error code.

Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
---
drivers/of/of_reserved_mem.c | 3 ++-
include/linux/of_reserved_mem.h | 9 ++++++---
2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
index 59fb12e84e6b..7e7de03585f9 100644
--- a/drivers/of/of_reserved_mem.c
+++ b/drivers/of/of_reserved_mem.c
@@ -243,7 +243,7 @@ static inline struct reserved_mem *__find_rmem(struct device_node *node)
* This function assign memory region pointed by "memory-region" device tree
* property to the given device.
*/
-void of_reserved_mem_device_init(struct device *dev)
+int of_reserved_mem_device_init(struct device *dev)
{
struct reserved_mem *rmem;
struct device_node *np;
@@ -260,6 +260,7 @@ void of_reserved_mem_device_init(struct device *dev)

rmem->ops->device_init(rmem, dev);
dev_info(dev, "assigned reserved memory node %s\n", rmem->name);
+ return 0;
}

/**
diff --git a/include/linux/of_reserved_mem.h b/include/linux/of_reserved_mem.h
index 5b5efae09135..ad2f67054372 100644
--- a/include/linux/of_reserved_mem.h
+++ b/include/linux/of_reserved_mem.h
@@ -16,7 +16,7 @@ struct reserved_mem {
};

struct reserved_mem_ops {
- void (*device_init)(struct reserved_mem *rmem,
+ int (*device_init)(struct reserved_mem *rmem,
struct device *dev);
void (*device_release)(struct reserved_mem *rmem,
struct device *dev);
@@ -28,14 +28,17 @@ typedef int (*reservedmem_of_init_fn)(struct reserved_mem *rmem);
_OF_DECLARE(reservedmem, name, compat, init, reservedmem_of_init_fn)

#ifdef CONFIG_OF_RESERVED_MEM
-void of_reserved_mem_device_init(struct device *dev);
+int of_reserved_mem_device_init(struct device *dev);
void of_reserved_mem_device_release(struct device *dev);

void fdt_init_reserved_mem(void);
void fdt_reserved_mem_save_node(unsigned long node, const char *uname,
phys_addr_t base, phys_addr_t size);
#else
-static inline void of_reserved_mem_device_init(struct device *dev) { }
+static inline int of_reserved_mem_device_init(struct device *dev)
+{
+ return -ENOSYS;
+}
static inline void of_reserved_mem_device_release(struct device *pdev) { }

static inline void fdt_init_reserved_mem(void) { }
--
1.9.2

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