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Dmitry Osipenko authored
It is possible to get an instant RX timeout or end-of-transfer interrupt before RX DMA was started, if transaction is less than 16 bytes. Transfer should be handled in PIO mode in this case because DMA can't handle it. This patch brings back the original behaviour of the driver that was changed by accident by a previous commit, it fixes occasional Bluetooth HW initialization failures which I started to notice recently. Fixes: d5e3fadb ("tty: serial: tegra: Activate RX DMA transfer by request") Signed-off-by:
Dmitry Osipenko <digetx@gmail.com> Link: https://lore.kernel.org/r/20200209164415.9632-1-digetx@gmail.comSigned-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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