sony-laptop: Make sony_pic_set_wwanpower not take mutexes

For consistency with __sony_pic_set_bluetoothpower, this is also needed
later to allow setting the wwanpower attribute from the resume path and
only lock the mutex once.

Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 5 insertions, 7 deletions

diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index 3575a2d8f1ce..8796dc69950e 100644
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -2001,18 +2001,14 @@ int sony_pic_camera_command(int command, u8 value)
 EXPORT_SYMBOL(sony_pic_camera_command);
 
 /* gprs/edge modem (SZ460N and SZ210P), thanks to Joshua Wise */
-static void sony_pic_set_wwanpower(u8 state)
+static void __sony_pic_set_wwanpower(u8 state)
 {
         state = !!state;
-        mutex_lock(&spic_dev.lock);
-        if (spic_dev.wwan_power == state) {
-                mutex_unlock(&spic_dev.lock);
+        if (spic_dev.wwan_power == state)
                 return;
-        }
         sony_pic_call2(0xB0, state);
         sony_pic_call1(0x82);
         spic_dev.wwan_power = state;
-        mutex_unlock(&spic_dev.lock);
 }
 
 static ssize_t sony_pic_wwanpower_store(struct device *dev,
@@ -2024,7 +2020,9 @@ static ssize_t sony_pic_wwanpower_store(struct device *dev,
                 return -EINVAL;
 
         value = simple_strtoul(buffer, NULL, 10);
-        sony_pic_set_wwanpower(value);
+        mutex_lock(&spic_dev.lock);
+        __sony_pic_set_wwanpower(value);
+        mutex_unlock(&spic_dev.lock);
 
         return count;
 }