diff options
| author |   Johan Hovold <johan@kernel.org> | 2021-04-21 11:55:04 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-22 12:09:26 +0200 |
| commit | 38616c225e7088915f00be11c090543b7591e9a4 (patch) | |
| tree | 810483236de7db2660a4de96c7d2ebe7bccc2bbe /drivers/tty/serial | |
| parent | serial: sa1100: drop low-latency workaround (diff) | |
| download | linux-dev-38616c225e7088915f00be11c090543b7591e9a4.tar.xz linux-dev-38616c225e7088915f00be11c090543b7591e9a4.zip | |
serial: txx9: drop low-latency workaround
Commit f5ee56cc184e ("[PATCH] txx9 serial update") 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/20210421095509.3024-22-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/serial_txx9.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/tty/serial/serial_txx9.c b/drivers/tty/serial/serial_txx9.c index 7a07e7272de1..0a7e5b74bc1d 100644 --- a/drivers/tty/serial/serial_txx9.c +++ b/drivers/tty/serial/serial_txx9.c @@ -330,9 +330,9 @@ receive_chars(struct uart_txx9_port *up, unsigned int *status) up->port.ignore_status_mask = next_ignore_status_mask; disr = sio_in(up, TXX9_SIDISR); } while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0)); - spin_unlock(&up->port.lock); + tty_flip_buffer_push(&up->port.state->port); - spin_lock(&up->port.lock); + *status = disr; } |