Re: [PATCH] serial: drop irq-flags initialisations

From: Uwe Kleine-König
Date: Wed May 19 2021 - 05:46:10 EST


On Wed, May 19, 2021 at 11:25:41AM +0200, Johan Hovold wrote:
> There's no need to initialise irq-flags variables before saving the
> interrupt state.
>
> Drop the redundant initialisations from drivers that got this wrong.
>
> Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
> ---
> drivers/tty/serial/amba-pl011.c | 2 +-
> drivers/tty/serial/imx.c | 2 +-
> drivers/tty/serial/omap-serial.c | 10 +++++-----
> drivers/tty/serial/serial_core.c | 4 ++--
> drivers/tty/serial/st-asc.c | 2 +-
> drivers/tty/serial/stm32-usart.c | 2 +-
> drivers/tty/serial/xilinx_uartps.c | 8 ++++----
> 7 files changed, 15 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
> index 78682c12156a..e14f3378b8a0 100644
> --- a/drivers/tty/serial/amba-pl011.c
> +++ b/drivers/tty/serial/amba-pl011.c
> @@ -1062,7 +1062,7 @@ static void pl011_dma_rx_poll(struct timer_list *t)
> struct tty_port *port = &uap->port.state->port;
> struct pl011_dmarx_data *dmarx = &uap->dmarx;
> struct dma_chan *rxchan = uap->dmarx.chan;
> - unsigned long flags = 0;
> + unsigned long flags;
> unsigned int dmataken = 0;
> unsigned int size = 0;
> struct pl011_sgbuf *sgbuf;
> diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
> index 7d5a8dfa3e91..4b838601cdce 100644
> --- a/drivers/tty/serial/imx.c
> +++ b/drivers/tty/serial/imx.c
> @@ -1975,8 +1975,8 @@ imx_uart_console_write(struct console *co, const char *s, unsigned int count)
> {
> struct imx_port *sport = imx_uart_ports[co->index];
> struct imx_port_ucrs old_ucr;
> + unsigned long flags;
> unsigned int ucr1;
> - unsigned long flags = 0;
> int locked = 1;
>
> if (sport->port.sysrq)

Apart from changing the order here being unnecessary, the patch looks
right. Ditto for serial_core.c and xilinx_uartps.c.
I don't care much though, so

Acked-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>

Best regards
Uwe

--
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