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of/fdt: Remove of_scan_flat_dt() usage for __fdt_scan_reserved_mem()

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Use of the of_scan_flat_dt() function predates libfdt and is discouraged
as libfdt provides a nicer set of APIs. Rework __fdt_scan_reserved_mem()
to be called directly and use libfdt.

Cc: Frank Rowand <frowand.list@gmail.com>
Link: https://lore.kernel.org/r/20211029183615.2721777-1-robh@kernel.org/
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Rob Herring 2021-10-20 15:44:36 -05:00
parent 9526565591
commit fb2293fd5e
1 changed files with 23 additions and 27 deletions
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50
drivers/of/fdt.c
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@ -562,39 +562,35 @@ static int __init __reserved_mem_check_root(unsigned long node)
}
/*
* __fdt_scan_reserved_mem() - scan a single FDT node for reserved memory
* fdt_scan_reserved_mem() - scan a single FDT node for reserved memory
*/
static int __init __fdt_scan_reserved_mem(unsigned long node, const char *uname,
int depth, void *data)
static int __init fdt_scan_reserved_mem(void)
{
static int found;
int err;
int node, child;
const void *fdt = initial_boot_params;
if (!found && depth == 1 && strcmp(uname, "reserved-memory") == 0) {
if (__reserved_mem_check_root(node) != 0) {
pr_err("Reserved memory: unsupported node format, ignoring\n");
/* break scan */
return 1;
}
found = 1;
/* scan next node */
return 0;
} else if (!found) {
/* scan next node */
return 0;
} else if (found && depth < 2) {
/* scanning of /reserved-memory has been finished */
return 1;
node = fdt_path_offset(fdt, "/reserved-memory");
if (node < 0)
return -ENODEV;
if (__reserved_mem_check_root(node) != 0) {
pr_err("Reserved memory: unsupported node format, ignoring\n");
return -EINVAL;
}
if (!of_fdt_device_is_available(initial_boot_params, node))
return 0;
fdt_for_each_subnode(child, fdt, node) {
const char *uname;
int err;
err = __reserved_mem_reserve_reg(node, uname);
if (err == -ENOENT && of_get_flat_dt_prop(node, "size", NULL))
fdt_reserved_mem_save_node(node, uname, 0, 0);
if (!of_fdt_device_is_available(fdt, child))
continue;
/* scan next node */
uname = fdt_get_name(fdt, child, NULL);
err = __reserved_mem_reserve_reg(child, uname);
if (err == -ENOENT && of_get_flat_dt_prop(child, "size", NULL))
fdt_reserved_mem_save_node(child, uname, 0, 0);
}
return 0;
}
@ -645,7 +641,7 @@ void __init early_init_fdt_scan_reserved_mem(void)
early_init_dt_reserve_memory_arch(base, size, false);
}
of_scan_flat_dt(__fdt_scan_reserved_mem, NULL);
fdt_scan_reserved_mem();
fdt_init_reserved_mem();
fdt_reserve_elfcorehdr();
}