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efi_loader: allow booting from short dev only DP

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Allow booting from a short form device-path without file path, e.g.

    /HD(1,GPT,5ef79931-a1aa-4c70-9d67-611e8f69eafd,0x800,0x1000)

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2022-06-11 05:22:07 +00:00
parent 3a0654ecd0
commit 178667b34b
1 changed files with 4 additions and 5 deletions
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9
lib/efi_loader/efi_bootmgr.c
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@ -44,7 +44,7 @@ static const struct efi_runtime_services *rs;
static
struct efi_device_path *expand_media_path(struct efi_device_path *device_path)
{
struct efi_device_path *dp, *full_path;
struct efi_device_path *dp, *rem, *full_path;
efi_handle_t handle;
efi_status_t ret;
@ -57,11 +57,10 @@ struct efi_device_path *expand_media_path(struct efi_device_path *device_path)
* booting from removable media.
*/
dp = device_path;
ret = EFI_CALL(efi_locate_device_path(
&efi_simple_file_system_protocol_guid,
&dp, &handle));
handle = efi_dp_find_obj(dp, &efi_simple_file_system_protocol_guid,
&rem);
if (ret == EFI_SUCCESS) {
if (dp->type == DEVICE_PATH_TYPE_END) {
if (rem->type == DEVICE_PATH_TYPE_END) {
dp = efi_dp_from_file(NULL, 0,
"/EFI/BOOT/" BOOTEFI_NAME);
full_path = efi_dp_append(device_path, dp);