Document that mixing DM_DEVICE_REMOVE and DM_USB is a bad idea, and also why
this is a bad idea.

Signed-off-by: Hans de Goede <hdego...@redhat.com>
---
 drivers/core/Kconfig | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/core/Kconfig b/drivers/core/Kconfig
index 2861b43..e40372d 100644
--- a/drivers/core/Kconfig
+++ b/drivers/core/Kconfig
@@ -38,6 +38,10 @@ config DM_DEVICE_REMOVE
          device. This is not normally required in SPL, so by default this
          option is disabled for SPL.
 
+         Note that this may have undesirable results in the USB subsystem as
+         it causes unplugged devices to linger around in the dm-tree, and it
+         causes USB host controllers to not be stopped when booting the OS.
+
 config DM_STDIO
        bool "Support stdio registration"
        depends on DM
-- 
2.4.3

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