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authorVignesh Raghavendra <vigneshr@ti.com>2020-03-19 16:02:30 +0530
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-03-24 12:25:09 +0100
commitf4b042a050062b2dec456adfced13d61341939e2 (patch)
tree8be002345700a4f9e97b1f2ca23274efd91c0cd6 /drivers/tty
parentf19c3f6c8109b8bab000afd35580929958e087a9 (diff)
serial: 8250: 8250_omap: Fix throttle to call stop_rx()
Call stop_rx() to halt reception when throttle is requested. Update unthrottle callback to restart reception. Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> Link: https://lore.kernel.org/r/20200319103230.16867-3-vigneshr@ti.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/8250/8250_omap.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c
index dd69226ce918..b0e70390bc55 100644
--- a/drivers/tty/serial/8250/8250_omap.c
+++ b/drivers/tty/serial/8250/8250_omap.c
@@ -699,14 +699,12 @@ static void omap_8250_shutdown(struct uart_port *port)
static void omap_8250_throttle(struct uart_port *port)
{
struct omap8250_priv *priv = port->private_data;
- struct uart_8250_port *up = up_to_u8250p(port);
unsigned long flags;
pm_runtime_get_sync(port->dev);
spin_lock_irqsave(&port->lock, flags);
- up->ier &= ~(UART_IER_RLSI | UART_IER_RDI);
- serial_out(up, UART_IER, up->ier);
+ port->ops->stop_rx(port);
priv->throttled = true;
spin_unlock_irqrestore(&port->lock, flags);
@@ -727,6 +725,7 @@ static void omap_8250_unthrottle(struct uart_port *port)
if (up->dma)
up->dma->rx_dma(up);
up->ier |= UART_IER_RLSI | UART_IER_RDI;
+ port->read_status_mask |= UART_LSR_DR;
serial_out(up, UART_IER, up->ier);
spin_unlock_irqrestore(&port->lock, flags);