diff options
author | Marek Szyprowski <m.szyprowski@samsung.com> | 2014-10-29 21:50:29 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-10-29 23:33:14 (GMT) |
commit | 47f29df7db78ee4fcdb104cf36918d987ddd0278 (patch) | |
tree | dddc4e6874daebe2258972f2aa17a7a2c0ac6aa9 | |
parent | 5ddacbe92b806cd5b4f8f154e8e46ac267fff55c (diff) | |
download | linux-47f29df7db78ee4fcdb104cf36918d987ddd0278.tar.xz |
drivers: of: add return value to of_reserved_mem_device_init()
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 7bfa5ab6fa1b ("drivers:
dma-coherent: add initialization from device tree"), which has been
merged without this change and without fixing function return value.
Fixes: 7bfa5ab6fa1b1 ("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>
-rw-r--r-- | drivers/base/dma-contiguous.c | 3 | ||||
-rw-r--r-- | drivers/of/of_reserved_mem.c | 14 | ||||
-rw-r--r-- | include/linux/of_reserved_mem.h | 9 |
3 files changed, 17 insertions, 9 deletions
diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c index 473ff48..950fff9 100644 --- a/drivers/base/dma-contiguous.c +++ b/drivers/base/dma-contiguous.c @@ -223,9 +223,10 @@ bool dma_release_from_contiguous(struct device *dev, struct page *pages, #undef pr_fmt #define pr_fmt(fmt) fmt -static void rmem_cma_device_init(struct reserved_mem *rmem, struct device *dev) +static int rmem_cma_device_init(struct reserved_mem *rmem, struct device *dev) { dev_set_cma_area(dev, rmem->priv); + return 0; } static void rmem_cma_device_release(struct reserved_mem *rmem, diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c index 59fb12e..dc566b3 100644 --- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -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; + + ret = rmem->ops->device_init(rmem, dev); + if (ret == 0) + dev_info(dev, "assigned reserved memory node %s\n", rmem->name); - rmem->ops->device_init(rmem, dev); - dev_info(dev, "assigned reserved memory node %s\n", rmem->name); + return ret; } /** 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) { } |