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-rw-r--r--drivers/serial/serial_core.c9
-rw-r--r--include/linux/serial_core.h1
2 files changed, 8 insertions, 2 deletions
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
index d814bb1dcb05..397147a7054f 100644
--- a/drivers/serial/serial_core.c
+++ b/drivers/serial/serial_core.c
@@ -1940,6 +1940,9 @@ int uart_suspend_port(struct uart_driver *drv, struct uart_port *port)
if (state->info && state->info->flags & UIF_INITIALIZED) {
const struct uart_ops *ops = port->ops;
+ state->info->flags = (state->info->flags & ~UIF_INITIALIZED)
+ | UIF_SUSPENDED;
+
spin_lock_irq(&port->lock);
ops->stop_tx(port);
ops->set_mctrl(port, 0);
@@ -2006,7 +2009,7 @@ int uart_resume_port(struct uart_driver *drv, struct uart_port *port)
console_start(port->cons);
}
- if (state->info && state->info->flags & UIF_INITIALIZED) {
+ if (state->info && state->info->flags & UIF_SUSPENDED) {
const struct uart_ops *ops = port->ops;
int ret;
@@ -2018,15 +2021,17 @@ int uart_resume_port(struct uart_driver *drv, struct uart_port *port)
ops->set_mctrl(port, port->mctrl);
ops->start_tx(port);
spin_unlock_irq(&port->lock);
+ state->info->flags |= UIF_INITIALIZED;
} else {
/*
* Failed to resume - maybe hardware went away?
* Clear the "initialized" flag so we won't try
* to call the low level drivers shutdown method.
*/
- state->info->flags &= ~UIF_INITIALIZED;
uart_shutdown(state);
}
+
+ state->info->flags &= ~UIF_SUSPENDED;
}
mutex_unlock(&state->mutex);
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 86501a3de2ac..f9fdf97506ea 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -319,6 +319,7 @@ struct uart_info {
#define UIF_CTS_FLOW ((__force uif_t) (1 << 26))
#define UIF_NORMAL_ACTIVE ((__force uif_t) (1 << 29))
#define UIF_INITIALIZED ((__force uif_t) (1 << 31))
+#define UIF_SUSPENDED ((__force uif_t) (1 << 30))
int blocked_open;
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