From: Andy Shevchenko <andriy.shevche...@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.shevche...@linux.intel.com>
Signed-off-by: Nilesh Bacchewar <nilesh.bacche...@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
--
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