Difuse/u-boot
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

efi_loader: link partition to block device

Browse source 
We provide a UEFI driver for block devices. When ConnectController() is
called for a handle with the EFI_BLOCK_IO_PROTOCOL this driver creates the
partitions. When DisconnectController() is called the handles for the
partitions have to be deleted. This requires that the child controllers
(partitions) open the EFI_BLOCK_IO_PROTOCOL of the controller (block IO
device) with attribute EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2020-01-10 12:36:01 +01:00
parent f9ad240e65
commit 264485131c
1 changed files with 20 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

20
lib/efi_loader/efi_disk.c
View file

@ -376,6 +376,23 @@ static efi_status_t efi_disk_add_dev(
/* Fill in object data */
if (part) {
struct efi_device_path *node = efi_dp_part_node(desc, part);
struct efi_handler *handler;
void *protocol_interface;
/* Parent must expose EFI_BLOCK_IO_PROTOCOL */
ret = efi_search_protocol(parent, &efi_block_io_guid, &handler);
if (ret != EFI_SUCCESS)
goto error;
/*
* Link the partition (child controller) to the block device
* (controller).
*/
ret = efi_protocol_open(handler, &protocol_interface, NULL,
&diskobj->header,
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER);
if (ret != EFI_SUCCESS)
goto error;
diskobj->dp = efi_dp_append_node(dp_parent, node);
efi_free_pool(node);
@ -453,6 +470,9 @@ static efi_status_t efi_disk_add_dev(
}
}
return EFI_SUCCESS;
error:
efi_delete_handle(&diskobj->header);
return ret;
}
/**