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of/reserved_mem: Simplify the logic of fdt_scan_reserved_mem_reg_nodes()

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Use the existing helper functions to simplify the logic of
fdt_scan_reserved_mem_reg_nodes()

Signed-off-by: Yuntao Wang <yuntao.wang@linux.dev>
Link: https://patch.msgid.link/20251115134753.179931-8-yuntao.wang@linux.dev
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
This commit is contained in:
Yuntao Wang
2025-11-15 21:47:52 +08:00
committed by Rob Herring (Arm)
parent 8c0f606831
commit 85a8a30c5b
1 changed files with 7 additions and 18 deletions
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25
drivers/of/of_reserved_mem.c
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@@ -225,12 +225,9 @@ static void __init __rmem_check_for_overlap(void);
*/
void __init fdt_scan_reserved_mem_reg_nodes(void)
{
int t_len = (dt_root_addr_cells + dt_root_size_cells) * sizeof(__be32);
const void *fdt = initial_boot_params;
phys_addr_t base, size;
const __be32 *prop;
int node, child;
int len;
if (!fdt)
return;
@@ -251,29 +248,21 @@ void __init fdt_scan_reserved_mem_reg_nodes(void)
fdt_for_each_subnode(child, fdt, node) {
const char *uname;
u64 b, s;
prop = of_get_flat_dt_prop(child, "reg", &len);
if (!prop)
continue;
if (!of_fdt_device_is_available(fdt, child))
continue;
uname = fdt_get_name(fdt, child, NULL);
if (len && len % t_len != 0) {
pr_err("Reserved memory: invalid reg property in '%s', skipping node.\n",
uname);
if (!of_flat_dt_get_addr_size(child, "reg", &b, &s))
continue;
}
if (len > t_len)
pr_warn("%s() ignores %d regions in node '%s'\n",
__func__, len / t_len - 1, uname);
base = b;
size = s;
base = dt_mem_next_cell(dt_root_addr_cells, &prop);
size = dt_mem_next_cell(dt_root_size_cells, &prop);
if (size)
if (size) {
uname = fdt_get_name(fdt, child, NULL);
fdt_reserved_mem_save_node(child, uname, base, size);
}
}
/* check for overlapping reserved regions */