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serial: owl: drop low-latency workaround

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The owl driver has always carried an unnecessary workaround for the
infamous low_latency behaviour of tty_flip_buffer_push(), which had
been removed years before the driver was added by commit fc60a8b675
("tty: serial: owl: Implement console driver").

Specifically, since commit a9c3f68f3c ("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/20210421095509.3024-18-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2021-04-21 11:55:00 +02:00 committed by Greg Kroah-Hartman
parent c0a6c9f79e
commit 493a275c04
1 changed files with 0 additions and 2 deletions
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2
drivers/tty/serial/owl-uart.c
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@ -247,9 +247,7 @@ static void owl_uart_receive_chars(struct uart_port *port)
stat = owl_uart_read(port, OWL_UART_STAT);
}
spin_unlock(&port->lock);
tty_flip_buffer_push(&port->state->port);
spin_lock(&port->lock);
}
static irqreturn_t owl_uart_irq(int irq, void *dev_id)