efi: Correct assumption about if_type

efi_set_blk_dev_to_system_partition() assumes that 0 is an invalid
if_type. This is true now but is about to be false. Fix this bug to avoid
a test failure.

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/lib/efi_loader/efi_var_file.c b/lib/efi_loader/efi_var_file.c
index 76a2ff9..994e663 100644 (file)
--- a/lib/efi_loader/efi_var_file.c
+++ b/lib/efi_loader/efi_var_file.c
@@ -38,7 +38,7 @@ static efi_status_t __maybe_unused efi_set_blk_dev_to_system_partition(void)
        char part_str[PART_STR_LEN];
        int r;
 
-       if (!efi_system_partition.if_type) {
+       if (efi_system_partition.if_type == UCLASS_INVALID) {
                log_err("No EFI system partition\n");
                return EFI_DEVICE_ERROR;
        }