This changes of_fdt_unflatten_tree() so that it returns the allocated memory chunk for unflattened device-tree, which can be released once it's obsoleted. Signed-off-by: Gavin Shan <gwshan@xxxxxxxxxxxxxxxxxx> --- drivers/of/fdt.c | 11 ++++++----- include/linux/of_fdt.h | 2 +- 2 files changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index 074870a..8e1ba7e 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -408,7 +408,7 @@ static void *unflatten_dt_node(const void *blob, * @dt_alloc: An allocator that provides a virtual address to memory * for the resulting tree */ -static void __unflatten_device_tree(const void *blob, +static void *__unflatten_device_tree(const void *blob, struct device_node *dad, struct device_node **mynodes, void * (*dt_alloc)(u64 size, u64 align)) @@ -421,7 +421,7 @@ static void __unflatten_device_tree(const void *blob, if (!blob) { pr_debug("No device tree pointer\n"); - return; + return NULL; } pr_debug("Unflattening device tree:\n"); @@ -431,7 +431,7 @@ static void __unflatten_device_tree(const void *blob, if (fdt_check_header(blob)) { pr_err("Invalid device tree blob header\n"); - return; + return NULL; } /* First pass, scan for size */ @@ -458,6 +458,7 @@ static void __unflatten_device_tree(const void *blob, be32_to_cpup(mem + size)); pr_debug(" <- unflatten_device_tree()\n"); + return mem; } static void *kernel_tree_alloc(u64 size, u64 align) @@ -473,11 +474,11 @@ static void *kernel_tree_alloc(u64 size, u64 align) * pointers of the nodes so the normal device-tree walking functions * can be used. */ -void of_fdt_unflatten_tree(const unsigned long *blob, +void *of_fdt_unflatten_tree(const unsigned long *blob, struct device_node *dad, struct device_node **mynodes) { - __unflatten_device_tree(blob, dad, mynodes, &kernel_tree_alloc); + return __unflatten_device_tree(blob, dad, mynodes, &kernel_tree_alloc); } EXPORT_SYMBOL_GPL(of_fdt_unflatten_tree); diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h index 3644960..00db279 100644 --- a/include/linux/of_fdt.h +++ b/include/linux/of_fdt.h @@ -37,7 +37,7 @@ extern bool of_fdt_is_big_endian(const void *blob, unsigned long node); extern int of_fdt_match(const void *blob, unsigned long node, const char *const *compat); -extern void of_fdt_unflatten_tree(const unsigned long *blob, +extern void *of_fdt_unflatten_tree(const unsigned long *blob, struct device_node *dad, struct device_node **mynodes); -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html