The patch titled
Subject: drivers: of: add return value to of_reserved_mem_device_init()
has been added to the -mm tree. Its filename is
drivers-of-add-return-value-to-of_reserved_mem_device_init.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/drivers-of-add-return-value-to-of_reserved_mem_device_init.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/drivers-of-add-return-value-to-of_reserved_mem_device_init.patch
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------------------------------------------------------
From: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Subject: 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 7bfa5ab6fa1b ("drivers:
dma-coherent: add initialization from device tree"), which has been merged
without this change and without fixing function return value.
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Michal Nazarewicz <mina86@xxxxxxxxxx>
Cc: Grant Likely <grant.likely@xxxxxxxxxx>
Cc: Laura Abbott <lauraa@xxxxxxxxxxxxxx>
Cc: Josh Cartwright <joshc@xxxxxxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Cc: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
Cc: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/base/dma-contiguous.c | 3 ++-
drivers/of/of_reserved_mem.c | 14 +++++++++-----
include/linux/of_reserved_mem.h | 9 ++++++---
3 files changed, 17 insertions(+), 9 deletions(-)
diff -puN drivers/base/dma-contiguous.c~drivers-of-add-return-value-to-of_reserved_mem_device_init drivers/base/dma-contiguous.c
--- a/drivers/base/dma-contiguous.c~drivers-of-add-return-value-to-of_reserved_mem_device_init
+++ a/drivers/base/dma-contiguous.c
@@ -223,9 +223,10 @@ bool dma_release_from_contiguous(struct
#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 -puN drivers/of/of_reserved_mem.c~drivers-of-add-return-value-to-of_reserved_mem_device_init drivers/of/of_reserved_mem.c
--- a/drivers/of/of_reserved_mem.c~drivers-of-add-return-value-to-of_reserved_mem_device_init
+++ a/drivers/of/of_reserved_mem.c
@@ -243,23 +243,27 @@ static inline struct reserved_mem *__fin
* 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;
}
/**
diff -puN include/linux/of_reserved_mem.h~drivers-of-add-return-value-to-of_reserved_mem_device_init include/linux/of_reserved_mem.h
--- a/include/linux/of_reserved_mem.h~drivers-of-add-return-value-to-of_reserved_mem_device_init
+++ a/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)(st
_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) { }
_
Patches currently in -mm which might be from m.szyprowski@xxxxxxxxxxx are
origin.patch
drivers-of-add-return-value-to-of_reserved_mem_device_init.patch
mm-introduce-single-zone-pcplists-drain.patch
mm-page_isolation-drain-single-zone-pcplists.patch
mm-cma-drain-single-zone-pcplists.patch
mm-memory_hotplug-failure-drain-single-zone-pcplists.patch
cma-make-default-cma-area-size-zero-for-x86.patch
linux-next.patch
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