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Calling EDK2's OpenProtocol() with attributes BY_DRIVER|EXCLUSIVE will call DisconnectController() in a loop to attempt to dislodge any existing openers with attributes BY_DRIVER. The loop will continue indefinitely until either no such openers remain, or until DisconnectController() returns an error. If our driver binding protocol's Stop() method is ever called to disconnect a device that we are not in fact driving, then return EFI_DEVICE_ERROR rather than EFI_SUCCESS, in order to break this potentially infinite loop. Signed-off-by: Michael Brown <mcb30@ipxe.org> |
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