[U-Boot] [PATCH v2 3/3] efi_loader: disk: install file system protocol to a whole disk

[AKASHI Takahiro]

Currently, a whole disk without any partitions is not associated
with EFI_SIMPLE_FILE_SYSTEM_PROTOCOL. So even if it houses FAT
file system, there is a chance that we may not be able to access
it, particularly, when accesses are to be attempted after searching
that protocol against a device handle.

With this patch, EFI_SIMPLE_FILE_SYSTEM_PROTOCOL is installed
to such a disk if part_get_info() shows there is not partition
table installed on it.

Signed-off-by: AKASHI Takahiro <takahiro.akashi at linaro.org>
---
 lib/efi_loader/efi_disk.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/efi_loader/efi_disk.c b/lib/efi_loader/efi_disk.c
index d72f455901f2..d36f22cedc52 100644
--- a/lib/efi_loader/efi_disk.c
+++ b/lib/efi_loader/efi_disk.c
@@ -253,6 +253,7 @@ static efi_status_t efi_disk_add_dev(
 				struct efi_disk_obj **disk)
 {
 	struct efi_disk_obj *diskobj;
+	disk_partition_t info;
 	efi_status_t ret;
 
 	/* Don't add empty devices */
@@ -284,7 +285,9 @@ static efi_status_t efi_disk_add_dev(
 			       diskobj->dp);
 	if (ret != EFI_SUCCESS)
 		return ret;
-	if (part >= 1 && efi_fs_exists(desc, part)) {
+	/* partitions or whole disk without partitions */
+	if ((part >= 1 || part_get_info(desc, part, &info)) &&
+	    efi_fs_exists(desc, part)) {
 		diskobj->volume = efi_simple_file_system(desc, part,
 							 diskobj->dp);
 		ret = efi_add_protocol(&diskobj->header,
-- 
2.21.0