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efi_loader: discover if no efi_system_partition is set

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Variable efi_system_partition holds the efi_system_partition. Currently it
is initialized as:

    {
      .uclass_id = 0 = UCLASS_ROOT,
      .denum = 0,
      .part = 0,
    }

This indicates that host 0:0 is the efi_system_partition and we see output
like:

    => bootefi hello
    ** Bad device specification host 0 **
    Couldn't find partition host 0:0

To identify that no EFI system partition has been set use UCLASS_INVALID.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Heinrich Schuchardt 2022-10-21 08:33:44 +02:00
parent 023d9c9393
commit 2b55ad304d
1 changed files with 4 additions and 2 deletions
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6
lib/efi_loader/efi_disk.c
View file

@ -19,7 +19,9 @@
#include <part.h>
#include <malloc.h>
struct efi_system_partition efi_system_partition;
struct efi_system_partition efi_system_partition = {
.uclass_id = UCLASS_INVALID,
};
const efi_guid_t efi_block_io_guid = EFI_BLOCK_IO_PROTOCOL_GUID;
const efi_guid_t efi_system_partition_guid = PARTITION_SYSTEM_GUID;
@ -511,7 +513,7 @@ static efi_status_t efi_disk_add_dev(
diskobj->media.last_block);
/* Store first EFI system partition */
if (part && !efi_system_partition.uclass_id) {
if (part && efi_system_partition.uclass_id == UCLASS_INVALID) {
if (part_info->bootable & PART_EFI_SYSTEM_PARTITION) {
efi_system_partition.uclass_id = desc->uclass_id;
efi_system_partition.devnum = desc->devnum;