linux-kernel - [RFC PATCH 1/3] platform/x86: asus_wmi: Fix return value of fan_boost_mode

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Date:   Mon, 4 Nov 2019 20:26:34 +0200
From:   Leonid Maksymchuk <leonmaxx@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     platform-driver-x86@...r.kernel.org,
        acpi4asus-user@...ts.sourceforge.net, chiu@...lessm.com,
        yurii.pavlovskyi@...il.com, kristian@...usen.dk,
        andy@...radead.org, dvhart@...radead.org, corentin.chary@...il.com
Subject: [RFC PATCH 1/3] platform/x86: asus_wmi: Fix return value of
 fan_boost_mode_store

Function fan_boost_mode_store should return number of bytes written
but instead it returns return value of kstrtou8 which is 0 if
conversion is succefull. This leads to infinite loop after any
write to it's SysFS entry.

Fixes: b096f626a682 ("platform/x86: asus-wmi: Switch fan boost mode")
Signed-off-by: Leonid Maksymchuk <leonmaxx@...il.com>
---
  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 821b08e..723aa4d 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -1718,7 +1718,7 @@ 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
-- 
1.8.3.1