If the UART FIFO is already full at the start of the irq tests (e.g. because the data from the previous polled mode test is still being transmitted), then uart_fifo_fill() may not not be able to add the requested character to the FIFO and so return zero. Fix this issue by repeating retrying uart_fifo_fill() until success. Change-Id: I055ca1d4c91d81488b89f2a9b00031b9f2b8b222 Signed-off-by: Jon Medhurst <tixy@linaro.org> |
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