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| author | Stefan Agner <stefan@agner.ch> | 2016-07-19 13:13:05 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-08-31 15:48:28 +0200 |
| commit | d68827c62a105eec547945daedf4d1d3e283717d (patch) | |
| tree | ca79c531d0d11f14ab1c04e0816dd562a2169ece /lib/ts_fsm.c | |
| parent | d6b0d2f243fef6cb87f5338bf06c2330175f106f (diff) | |
tty: serial: fsl_lpuart: fix clearing of receive flag
Commit 8e4934c6d6c6 ("tty: serial: fsl_lpuart: clear receive flag on FIFO
flush") implemented clearing of the receive flag by reading the status register
only. It turned out that even though we flush the FIFO afterwards, a explicit
read of the data register is still required.
This leads to a FIFO underrun. To avoid this, follow the advice in the overrun
"Operation section": Unconditionally clear RXUF after using RXFLUSH.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib/ts_fsm.c')
0 files changed, 0 insertions, 0 deletions