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drivers: of: add return value to of_reserved_mem_device_init()

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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.

This fixes a build warining caused by commit 7bfa5ab6fa ("drivers:
dma-coherent: add initialization from device tree"), which has been
merged without this change and without fixing function return value.

Fixes: 7bfa5ab6fa ("drivers: dma-coherent: add initialization from device tree")
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Laura Abbott <lauraa@codeaurora.org>
Cc: Josh Cartwright <joshc@codeaurora.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Marek Szyprowski
2014-10-29 14:50:29 -07:00
committed by Linus Torvalds
parent 5ddacbe92b
commit 47f29df7db
3 changed files with 17 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/of/of_reserved_mem.c
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@@ -243,23 +243,27 @@ 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;
int ret;
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);
ret = rmem->ops->device_init(rmem, dev);
if (ret == 0)
dev_info(dev, "assigned reserved memory node %s\n", rmem->name);
return ret;
}
/**