[linux-yocto] [PATCH 03/15] serial: 8250_port: export serial8250_rpm_{get|put}_tx()

[Nilesh Bacchewar]

From: Andy Shevchenko <andriy.shevchenko at linux.intel.com>

Backport:
 - Upstream-Status: Pending.
 - Backport fix.
 [https://bitbucket.org/andy-shev/linux/commits/7d4e00c6253bc57b1ac0764ca76d4a8642354b54?at=master]

The following fix of runtime PM use in DMA mode requires at least
serial8250_rpm_put_tx() to be available. Export both calls.

Signed-off-by: Andy Shevchenko <andriy.shevchenko at linux.intel.com>
Signed-off-by: Nilesh Bacchewar <nilesh.bacchewar at intel.com>
---
 drivers/tty/serial/8250/8250.h      | 3 +++
 drivers/tty/serial/8250/8250_port.c | 6 ++++--
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h
index d54dcd8..d1507e2 100644
--- a/drivers/tty/serial/8250/8250.h
+++ b/drivers/tty/serial/8250/8250.h
@@ -118,6 +118,9 @@ struct uart_8250_port *serial8250_get_port(int line);
 void serial8250_rpm_get(struct uart_8250_port *p);
 void serial8250_rpm_put(struct uart_8250_port *p);
 
+void serial8250_rpm_get_tx(struct uart_8250_port *p);
+void serial8250_rpm_put_tx(struct uart_8250_port *p);
+
 #if defined(__alpha__) && !defined(CONFIG_PCI)
 /*
  * Digital did something really horribly wrong with the OUT1 and OUT2
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index d8d52db..805a15c 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -533,7 +533,7 @@ EXPORT_SYMBOL_GPL(serial8250_rpm_put);
  * once and disable_runtime_pm_tx() will still disable RPM because the fifo is
  * empty and the HW can idle again.
  */
-static void serial8250_rpm_get_tx(struct uart_8250_port *p)
+void serial8250_rpm_get_tx(struct uart_8250_port *p)
 {
 	unsigned char rpm_active;
 
@@ -545,8 +545,9 @@ static void serial8250_rpm_get_tx(struct uart_8250_port *p)
 		return;
 	pm_runtime_get_sync(p->port.dev);
 }
+EXPORT_SYMBOL_GPL(serial8250_rpm_get_tx);
 
-static void serial8250_rpm_put_tx(struct uart_8250_port *p)
+void serial8250_rpm_put_tx(struct uart_8250_port *p)
 {
 	unsigned char rpm_active;
 
@@ -559,6 +560,7 @@ static void serial8250_rpm_put_tx(struct uart_8250_port *p)
 	pm_runtime_mark_last_busy(p->port.dev);
 	pm_runtime_put_autosuspend(p->port.dev);
 }
+EXPORT_SYMBOL_GPL(serial8250_rpm_put_tx);
 
 /*
  * IER sleep support.  UARTs which have EFRs need the "extended
-- 
1.9.1