[PATCH v3] drivers: of: add return value to of_reserved_mem_device_init

From: Marek Szyprowski
Date: Thu Oct 09 2014 - 08:18:20 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 | 7 ++++---
include/linux/of_reserved_mem.h | 9 ++++++---
2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
index 59fb12e..70780ad 100644
--- a/drivers/of/of_reserved_mem.c
+++ b/drivers/of/of_reserved_mem.c
@@ -243,23 +243,24 @@ 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;

np = of_parse_phandle(dev->of_node, "memory-region", 0);
if (!np)
- return;
+ return -ENODEV;

rmem = __find_rmem(np);
of_node_put(np);

if (!rmem || !rmem->ops || !rmem->ops->device_init)
- return;
+ return -EINVAL;

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 5b5efae..ad2f670 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

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/