Staging: ipack/devices/ipoctal: read more than one character from RX FIFO.
The RX FIFO has a size of 3 characters. Check if when we are picking the oldest one, we have more to read. Signed-off-by: NSamuel Iglesias Gonsalvez <siglesias@igalia.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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