[U-Boot] [PATCH 1/1] efi_loader: AllocatePages() must accept addr == 0

[Heinrich Schuchardt]

It must be possible to allocate memory at address 0 with AllocatePages().

Move a NULL pointer check.

Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---
 lib/efi_loader/efi_memory.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c
index 8d76851234..27379381e8 100644
--- a/lib/efi_loader/efi_memory.c
+++ b/lib/efi_loader/efi_memory.c
@@ -334,7 +334,6 @@ uint64_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type,
  *
  * Check that the address is within allocated memory:
  *
- * * The address cannot be NULL.
  * * The address must be in a range of the memory map.
  * * The address may not point to EFI_CONVENTIONAL_MEMORY.
  *
@@ -349,8 +348,6 @@ static efi_status_t efi_check_allocated(u64 addr, bool must_be_allocated)
 {
 	struct efi_mem_list *item;

-	if (!addr)
-		return EFI_INVALID_PARAMETER;
 	list_for_each_entry(item, &efi_mem, link) {
 		u64 start = item->desc.physical_start;
 		u64 end = start + (item->desc.num_pages << EFI_PAGE_SHIFT);
@@ -560,6 +557,9 @@ efi_status_t efi_free_pool(void *buffer)
 	efi_status_t ret;
 	struct efi_pool_allocation *alloc;

+	if (!buffer)
+		return EFI_INVALID_PARAMETER;
+
 	ret = efi_check_allocated((uintptr_t)buffer, true);
 	if (ret != EFI_SUCCESS)
 		return ret;
--
2.20.1