efi_loader: disk: not create BLK device for BLK(IF_TYPE_EFI_LOADER) devices

When we create an efi_disk device with an UEFI application using driver
binding protocol, the 'efi_driver' framework tries to create
a corresponding block device(UCLASS_BLK/IF_TYPE_EFI). This will lead to
calling a PROBE callback, efi_disk_probe().
In this case, however, we don't need to create another "efi_disk" device
as we already have this device instance.

So we should avoid recursively invoke further processing in the callback
function.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>

1 files changed, 11 insertions, 3 deletions

diff --git a/lib/efi_loader/efi_disk.c b/lib/efi_loader/efi_disk.c
index d4a0edb458..037f8594a7 100644
--- a/lib/efi_loader/efi_disk.c
+++ b/lib/efi_loader/efi_disk.c
@@ -604,6 +604,7 @@ static int efi_disk_probe(void *ctx, struct event *event)
 {
 	struct udevice *dev;
 	enum uclass_id id;
+	struct blk_desc *desc;
 	struct udevice *child;
 	int ret;
 
@@ -614,9 +615,16 @@ static int efi_disk_probe(void *ctx, struct event *event)
 	if (id != UCLASS_BLK)
 		return 0;
 
-	ret = efi_disk_create_raw(dev);
-	if (ret)
-		return -1;
+	/*
+	 * avoid creating duplicated objects now that efi_driver
+	 * has already created an efi_disk at this moment.
+	 */
+	desc = dev_get_uclass_plat(dev);
+	if (desc->if_type != IF_TYPE_EFI_LOADER) {
+		ret = efi_disk_create_raw(dev);
+		if (ret)
+			return -1;
+	}
 
 	device_foreach_child(child, dev) {
 		ret = efi_disk_create_part(child);