From: Stephen Warren swarren@nvidia.com

It can take a while for a host machine to notice that a USB device has disconnected, and process the change. At the end of the DFU test, we wait up to 10 seconds for this to happen. This change makes the test wait the same (up to) 10 seconds at the start of the test for any previously active USB device-mode session to be cleaned up. Such as session might have been used to download U-Boot into memory for example; this is certainly true on my Tegra test systems. This changes should solve the DFU test intermittency issues I've been seeing on some Tegra devices.

Signed-off-by: Stephen Warren swarren@nvidia.com --- test/py/tests/test_dfu.py | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/test/py/tests/test_dfu.py b/test/py/tests/test_dfu.py index 8649d8731b73..585e6b29d7f8 100644 --- a/test/py/tests/test_dfu.py +++ b/test/py/tests/test_dfu.py @@ -136,6 +136,8 @@ def test_dfu(u_boot_console, env__usb_dev_port, env__dfu_config): Nothing. """

+ u_boot_utils.wait_until_file_open_fails( + env__usb_dev_port['host_usb_dev_node'], True) fh = u_boot_utils.attempt_to_open_file( env__usb_dev_port['host_usb_dev_node']) if fh: