From: Johan Hovold Date: Wed, 21 Apr 2021 09:54:57 +0000 (+0200) Subject: serial: meson: drop low-latency workaround X-Git-Tag: v5.15~1314^2~17 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b8555963ca1abf94b0f69b5f67d208aa78471795;p=platform%2Fkernel%2Flinux-starfive.git 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 ff7693d079e5 ("ARM: meson: serial: add MesonX SoC on-chip uart driver"). Specifically, 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 Link: https://lore.kernel.org/r/20210421095509.3024-15-johan@kernel.org Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c index 69eeef9..529cd02 100644 --- a/drivers/tty/serial/meson_uart.c +++ b/drivers/tty/serial/meson_uart.c @@ -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)