sc16is7xx: use kworker to update ier bits
.stop_rx/tx() are called in atomic context, we cannot use
blocking I/O. While at it correct the name of RX bit and
'*' placement in pointer declarations.
Signed-off-by: Jakub Kicinski <kubakici@wp.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index f218e24..86a679a 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -302,9 +302,11 @@
};
#define SC16IS7XX_RECONF_MD (1 << 0)
+#define SC16IS7XX_RECONF_IER (1 << 1)
struct sc16is7xx_one_config {
unsigned int flags;
+ u8 ier_clear;
};
struct sc16is7xx_one {
@@ -682,23 +684,30 @@
SC16IS7XX_MCR_LOOP_BIT,
(one->port.mctrl & TIOCM_LOOP) ?
SC16IS7XX_MCR_LOOP_BIT : 0);
+
+ if (config.flags & SC16IS7XX_RECONF_IER)
+ sc16is7xx_port_update(&one->port, SC16IS7XX_IER_REG,
+ config.ier_clear, 0);
}
-static void sc16is7xx_stop_tx(struct uart_port* port)
+static void sc16is7xx_ier_clear(struct uart_port *port, u8 bit)
{
- sc16is7xx_port_update(port, SC16IS7XX_IER_REG,
- SC16IS7XX_IER_THRI_BIT,
- 0);
-}
-
-static void sc16is7xx_stop_rx(struct uart_port* port)
-{
+ struct sc16is7xx_port *s = dev_get_drvdata(port->dev);
struct sc16is7xx_one *one = to_sc16is7xx_one(port, port);
- one->port.read_status_mask &= ~SC16IS7XX_LSR_DR_BIT;
- sc16is7xx_port_update(port, SC16IS7XX_IER_REG,
- SC16IS7XX_LSR_DR_BIT,
- 0);
+ one->config.flags |= SC16IS7XX_RECONF_IER;
+ one->config.ier_clear |= bit;
+ queue_kthread_work(&s->kworker, &one->reg_work);
+}
+
+static void sc16is7xx_stop_tx(struct uart_port *port)
+{
+ sc16is7xx_ier_clear(port, SC16IS7XX_IER_THRI_BIT);
+}
+
+static void sc16is7xx_stop_rx(struct uart_port *port)
+{
+ sc16is7xx_ier_clear(port, SC16IS7XX_IER_RDI_BIT);
}
static void sc16is7xx_start_tx(struct uart_port *port)