Commit 493a275c authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman
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serial: owl: drop low-latency workaround 



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 fc60a8b6
("tty: serial: owl: Implement console driver").

Specifically, since commit a9c3f68f ("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: default avatarJohan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20210421095509.3024-18-johan@kernel.org


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent c0a6c9f7

drivers/tty/serial/owl-uart.c

+0 −2
Original line number Diff line number Diff line
@@ -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)