[PATCH] serial: of-serial: fix up PM ops on no_console_suspend
From: Jingchang Lu <hidden>
Date: 2014-10-09 10:10:50
Also in:
linux-serial, lkml
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
Mandatorily disabling the uart clock will cause register access hung on "no_console_suspend". This patch add condition check on it and only disable the clock with console_suspend_enabled true. Signed-off-by: Joseph Lo <redacted> Signed-off-by: Jingchang Lu <redacted> --- drivers/tty/serial/of_serial.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
index 8bc2563..a765399 100644
--- a/drivers/tty/serial/of_serial.c
+++ b/drivers/tty/serial/of_serial.c@@ -246,7 +246,7 @@ static int of_serial_suspend(struct device *dev) struct of_serial_info *info = dev_get_drvdata(dev); serial8250_suspend_port(info->line); - if (info->clk) + if (info->clk && console_suspend_enabled) clk_disable_unprepare(info->clk); return 0;
@@ -256,7 +256,7 @@ static int of_serial_resume(struct device *dev) { struct of_serial_info *info = dev_get_drvdata(dev); - if (info->clk) + if (info->clk && console_suspend_enabled) clk_prepare_enable(info->clk); serial8250_resume_port(info->line);
--
1.8.0