[U-Boot] [PATCH v3 4/4] efi_loader: disk: install file system protocol to a whole disk

AKASHI Takahiro
2019-10-04T03:05:23Z

Currently, a whole disk without any partitions is not associated
with EFI_SIMPLE_FILE_SYSTEM_PROTOCOL. So even if it houses some
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 no partition
table installed on it.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
---
lib/efi_loader/efi_disk.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/efi_loader/efi_disk.c b/lib/efi_loader/efi_disk.c
index 27329cadb6f1..4e1a1efed7ec 100644
--- a/lib/efi_loader/efi_disk.c
+++ b/lib/efi_loader/efi_disk.c
@@ -329,7 +329,8 @@ 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 (efi_fs_exists(desc, part)) {
diskobj->volume = efi_simple_file_system(desc, part,
diskobj->dp);
ret = efi_add_protocol(&diskobj->header,
--
2.21.0