efi: Allow efi_free() to be called with size of 0

Make efi_free() safely callable with size of 0, similar to free() being
callable with NULL pointers, and do nothing in that case.
Remove size checks that this makes redundant.  This also avoids some
size checks in the ARM EFI stub code that will be added as well.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
This commit is contained in:
Roy Franz 2013-09-22 15:45:38 -07:00 коммит произвёл Matt Fleming
Родитель ae8e9060a3
Коммит 0e1cadb05b
2 изменённых файлов: 4 добавлений и 2 удалений

Просмотреть файл

@ -506,8 +506,7 @@ struct boot_params *make_boot_params(void *handle, efi_system_table_t *_table)
return boot_params;
fail2:
if (options_size)
efi_free(sys_table, options_size, hdr->cmd_line_ptr);
efi_free(sys_table, options_size, hdr->cmd_line_ptr);
fail:
efi_free(sys_table, 0x4000, (unsigned long)boot_params);
return NULL;

Просмотреть файл

@ -255,6 +255,9 @@ static void efi_free(efi_system_table_t *sys_table_arg, unsigned long size,
{
unsigned long nr_pages;
if (!size)
return;
nr_pages = round_up(size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
efi_call_phys2(sys_table_arg->boottime->free_pages, addr, nr_pages);
}