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| author | Johan Hovold <johan@kernel.org> | 2021-04-21 11:54:58 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-22 12:09:25 +0200 |
| commit | 6e560913aae066d532e48beeb7224aa3339f8d8e (patch) | |
| tree | 5a93a41df9dffdb3b641c3e29f0e963a040abb16 /drivers/tty | |
| parent | b8555963ca1abf94b0f69b5f67d208aa78471795 (diff) | |
| download | linux-6e560913aae066d532e48beeb7224aa3339f8d8e.tar.gz linux-6e560913aae066d532e48beeb7224aa3339f8d8e.tar.bz2 linux-6e560913aae066d532e48beeb7224aa3339f8d8e.zip | |
serial: mpc52xx_uart: drop low-latency workaround
Commit fbe543b412ce ("Fix a potential issue in mpc52xx uart driver")
worked around the infamous low_latency behaviour of
tty_flip_buffer_push() by simply dropping and reacquiring the port lock
in the interrupt handler.
Since commit a9c3f68f3cd8 ("tty: Fix low_latency BUG"),
tty_flip_buffer_push() always schedules a work item to push data to the
line discipline and there's no need to keep any low_latency hacks around.
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20210421095509.3024-16-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/mpc52xx_uart.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/tty/serial/mpc52xx_uart.c b/drivers/tty/serial/mpc52xx_uart.c index af1700445251..2704dc988e4a 100644 --- a/drivers/tty/serial/mpc52xx_uart.c +++ b/drivers/tty/serial/mpc52xx_uart.c @@ -1421,9 +1421,7 @@ mpc52xx_uart_int_rx_chars(struct uart_port *port) } } - spin_unlock(&port->lock); tty_flip_buffer_push(tport); - spin_lock(&port->lock); return psc_ops->raw_rx_rdy(port); } |