[PATCH v2 1/2] iommu: apple: Mark device with DM_FLAG_VITAL

[Janne Grunau via B4 Relay]

From: Janne Grunau <j at jannau.net>

Avoids NULL pointer dereferences in apple_dart_unmap when the iommu
device is removed before its user. U-boot's device model does not track
dependencies between devices.
Observed on a M1 Ultra Mac Studio with v2024.10.

Acked-by: Mark Kettenis <kettenis at openbsd.org>
Signed-off-by: Janne Grunau <j at jannau.net>
---
 drivers/iommu/apple_dart.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/apple_dart.c b/drivers/iommu/apple_dart.c
index 3e9e7819e517b8fe62b9e429b7a8ca3eca29741d..bfd4ad2010547de34d67f48e9b58295429ca8d3c 100644
--- a/drivers/iommu/apple_dart.c
+++ b/drivers/iommu/apple_dart.c
@@ -322,5 +322,5 @@ U_BOOT_DRIVER(apple_dart) = {
 	.ops = &apple_dart_ops,
 	.probe = apple_dart_probe,
 	.remove = apple_dart_remove,
-	.flags	= DM_FLAG_OS_PREPARE
+	.flags	= DM_FLAG_OS_PREPARE | DM_FLAG_VITAL
 };

-- 
2.47.0