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由 Andrey Moiseev 提交于
When 8042 internal data buffer is full, the driver erroneously decides that the controller is not present. i8042_flush returns the number of flushed bytes, which is in 0 - I8042_BUFFER_SIZE range inclusive. Therefore, i8042_flush has no way to indicate an error. Moreover i8042_controller_check takes initially full buffer (i8042_flush returned I8042_BUFFER_SIZE) as a sign of absence of the controller. Let's change i8042 to return success/error instead and make sure we do not return error prematurely. Signed-off-by: NAndrey Moiseev <o2g.org.ru@gmail.com> Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
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