Commit b8555963 authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman
Browse files

serial: meson: drop low-latency workaround 



The meson driver has always carried an unnecessary workaround for the
infamous low_latency behaviour of tty_flip_buffer_push(), which had
already been removed by the time the driver was added by commit
ff7693d0 ("ARM: meson: serial: add MesonX SoC on-chip uart 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/20210421095509.3024-15-johan@kernel.org


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 5d148754

drivers/tty/serial/meson_uart.c

+0 −2
Original line number Diff line number Diff line
@@ -226,9 +226,7 @@ static void meson_receive_chars(struct uart_port *port) 


	} while (!(readl(port->membase + AML_UART_STATUS) & AML_UART_RX_EMPTY));



	spin_unlock(&port->lock);

	tty_flip_buffer_push(tport);

	spin_lock(&port->lock);

}



static irqreturn_t meson_uart_interrupt(int irq, void *dev_id)