On Wed, Nov 09, 2022 at 06:58:22PM +0800, delisun wrote:
> Clearing the RX FIFO will cause data loss.
> Copy the pl011_enabl_interrupts implementation, and remove the clear
> interrupt and FIFO part of the code.
>
> Signed-off-by: delisun <delisun@xxxxxxxxxxxx>
> ---
> drivers/tty/serial/amba-pl011.c | 11 ++++++++++-
> 1 file changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
> index 5cdced39eafd..08034e5dcec0 100644
> --- a/drivers/tty/serial/amba-pl011.c
> +++ b/drivers/tty/serial/amba-pl011.c
> @@ -1828,8 +1828,17 @@ static void pl011_enable_interrupts(struct uart_amba_port *uap)
> static void pl011_unthrottle_rx(struct uart_port *port)
> {
> struct uart_amba_port *uap = container_of(port, struct uart_amba_port, port);
> + unsigned long flags;
>
> - pl011_enable_interrupts(uap);
> + spin_lock_irqsave(&uap->port.lock, flags);
> +
> + uap->im = UART011_RTIM;
> + if (!pl011_dma_rx_running(uap))
> + uap->im |= UART011_RXIM;
> +
> + pl011_write(uap->im, uap, REG_IMSC);
> +
> + spin_unlock_irqrestore(&uap->port.lock, flags);
> }
>
> static int pl011_startup(struct uart_port *port)
> --
> 2.25.1
>
>
>
How was this tested?
What commit id does this fix?
And your email is showing up as unvalidated, please fix your email
infrastructure to properly verify messages.
thanks,
greg k-h
