Commit a67a6ed15513541579d38bcbd127e7be170710e5
(of: Check for phys_addr_t overflows in early_init_dt_add_memory_arch)
corrected early_init_dt_add_memory_arch to account for overflows
but did so in an unclean way using ULONG_MAX. There is no
guarantee that sizeof(unsigned long) == sizeof(phys_addr_t).
Check against phys_addr_t instead.
Signed-off-by: Laura Abbott <lauraa@xxxxxxxxxxxxxx>
---
drivers/of/fdt.c | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index b777d8f..b88a68e 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -875,24 +875,24 @@ int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
}
#ifdef CONFIG_HAVE_MEMBLOCK
+#define MAX_PHYS_ADDR ((phys_addr_t)~0)
+
void __init __weak early_init_dt_add_memory_arch(u64 base, u64 size)
{
const u64 phys_offset = __pa(PAGE_OFFSET);
base &= PAGE_MASK;
size &= PAGE_MASK;
- if (sizeof(phys_addr_t) < sizeof(u64)) {
- if (base > ULONG_MAX) {
- pr_warning("Ignoring memory block 0x%llx - 0x%llx\n",
- base, base + size);
- return;
- }
+ if (base > MAX_PHYS_ADDR) {
+ pr_warning("Ignoring memory block 0x%llx - 0x%llx\n",
+ base, base + size);
+ return;
+ }
- if (base + size > ULONG_MAX) {
- pr_warning("Ignoring memory range 0x%lx - 0x%llx\n",
- ULONG_MAX, base + size);
- size = ULONG_MAX - base;
- }
+ if (base + size > MAX_PHYS_ADDR) {
+ pr_warning("Ignoring memory range 0x%lx - 0x%llx\n",
+ ULONG_MAX, base + size);
+ size = MAX_PHYS_ADDR - base;
}
if (base + size < phys_offset) {
--
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