In __fdt_scan_reserved_mem(), the availability of a node is determined
by testing its "status" property.
Move this check into its own function, borrowing logic from the
unflattened version, of_device_is_available().
Another caller will be added in a subsequent patch.
Signed-off-by: Reza Arbab <arbab@xxxxxxxxxxxxxxxxxx>
---
drivers/of/fdt.c | 26 +++++++++++++++++++++++---
include/linux/of_fdt.h | 2 ++
2 files changed, 25 insertions(+), 3 deletions(-)
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 085c638..9241c6e 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -151,6 +151,23 @@ int of_fdt_match(const void *blob, unsigned long node,
return score;
}
+bool of_fdt_is_available(const void *blob, unsigned long node)
+{
+ const char *status;
+ int statlen;
+
+ status = fdt_getprop(blob, node, "status", &statlen);
+ if (!status)
+ return true;
+
+ if (statlen) {
+ if (!strcmp(status, "okay") || !strcmp(status, "ok"))
+ return true;
+ }
+
+ return false;
+}
+
static void *unflatten_dt_alloc(void **mem, unsigned long size,
unsigned long align)
{
@@ -647,7 +664,6 @@ static int __init __fdt_scan_reserved_mem(unsigned long node, const char *uname,
int depth, void *data)
{
static int found;
- const char *status;
int err;
if (!found && depth == 1 && strcmp(uname, "reserved-memory") == 0) {
@@ -667,8 +683,7 @@ static int __init __fdt_scan_reserved_mem(unsigned long node, const char *uname,
return 1;
}
- status = of_get_flat_dt_prop(node, "status", NULL);
- if (status && strcmp(status, "okay") != 0 && strcmp(status, "ok") != 0)
+ if (!of_flat_dt_is_available(node))
return 0;
err = __reserved_mem_reserve_reg(node, uname);
@@ -809,6 +824,11 @@ int __init of_flat_dt_match(unsigned long node, const char *const *compat)
return of_fdt_match(initial_boot_params, node, compat);
}
+bool __init of_flat_dt_is_available(unsigned long node)
+{
+ return of_fdt_is_available(initial_boot_params, node);
+}
+
struct fdt_scan_status {
const char *name;
int namelen;
diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h
index 26c3302..49e0b8f 100644
--- a/include/linux/of_fdt.h
+++ b/include/linux/of_fdt.h
@@ -37,6 +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 bool of_fdt_is_available(const void *blob, unsigned long node);
extern void *of_fdt_unflatten_tree(const unsigned long *blob,
struct device_node *dad,
struct device_node **mynodes);
@@ -59,6 +60,7 @@ extern const void *of_get_flat_dt_prop(unsigned long node, const char *name,
int *size);
extern int of_flat_dt_is_compatible(unsigned long node, const char *name);
extern int of_flat_dt_match(unsigned long node, const char *const *matches);
+extern bool of_flat_dt_is_available(unsigned long node);
extern unsigned long of_get_flat_dt_root(void);
extern int of_get_flat_dt_size(void);
--
1.8.3.1
--
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