From 16b27b67c5002c13d84bdf68727954ec765f0731 Mon Sep 17 00:00:00 2001
From: Heinrich Schuchardt
Date: Mon, 3 Oct 2022 09:47:51 +0200
Subject: efi_loader: function to unlink udevice and handle

When deleting a device or a handle we must remove the link between the two
to avoid dangling references.

Provide function efi_unlink_dev() for this purpose.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
---
 lib/efi_loader/efi_helper.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'lib/efi_loader/efi_helper.c')

diff --git a/lib/efi_loader/efi_helper.c b/lib/efi_loader/efi_helper.c
index 8ed564e2619..c71e87d1180 100644
--- a/lib/efi_loader/efi_helper.c
+++ b/lib/efi_loader/efi_helper.c
@@ -171,3 +171,22 @@ int efi_link_dev(efi_handle_t handle, struct udevice *dev)
 	handle->dev = dev;
 	return dev_tag_set_ptr(dev, DM_TAG_EFI, handle);
 }
+
+/**
+ * efi_unlink_dev() - unlink udevice and handle
+ *
+ * @handle:	EFI handle to unlink
+ *
+ * Return:	0 on success, negative on failure
+ */
+int efi_unlink_dev(efi_handle_t handle)
+{
+	int ret;
+
+	ret = dev_tag_del(handle->dev, DM_TAG_EFI);
+	if (ret)
+		return ret;
+	handle->dev = NULL;
+
+	return 0;
+}
-- 
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