[PATCH AUTOSEL 5.5 012/121] platform/x86: asus_wmi: Fix return value of fan_boost_mode_store

Sasha Levin
2020-04-11T23:40:37Z

From: Leonid Maksymchuk <leonmaxx@gmail.com>

[ Upstream commit edeee341fd6c1099de357c517af215bee2c6f766 ]

Function fan_boost_mode_store returns 0 if store is successful,
this leads to infinite loop after any write to it's sysfs entry:

# echo 0 >/sys/devices/platform/asus-nb-wmi/fan_boost_mode

This command never ends, one CPU core is at 100% utilization.
This patch fixes this by returning size of written data.

Fixes: b096f626a682 ("platform/x86: asus-wmi: Switch fan boost mode")
Signed-off-by: Leonid Maksymchuk <leonmaxx@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/platform/x86/asus-wmi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 982f0cc8270ce..977b813cc0fa9 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -1712,7 +1712,7 @@ static ssize_t fan_boost_mode_store(struct device *dev,
asus->fan_boost_mode = new_mode;
fan_boost_mode_write(asus);

- return result;
+ return count;
}

// Fan boost mode: 0 - normal, 1 - overboost, 2 - silent
--
2.20.1