s390/scm: remove superfluous lock

Remove the spinlock from struct scm_device. drvdata and attributes
are guarded via device_lock.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/s390/cio/scm.c b/drivers/s390/cio/scm.c
index aa4476e92050..bcf20f3aa51b 100644
--- a/drivers/s390/cio/scm.c
+++ b/drivers/s390/cio/scm.c
@@ -5,7 +5,6 @@
  * Author(s): Sebastian Ott <sebott@linux.vnet.ibm.com>
  */
 
-#include <linux/spinlock.h>
 #include <linux/device.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
@@ -134,9 +133,9 @@ static ssize_t show_##name(struct device *dev,				\
         struct scm_device *scmdev = to_scm_dev(dev);                    \
         int ret;                                                        \
                                                                         \
-        spin_lock(&scmdev->lock);                                       \
+        device_lock(dev);                                               \
         ret = sprintf(buf, "%u\n", scmdev->attrs.name);                 \
-        spin_unlock(&scmdev->lock);                                     \
+        device_unlock(dev);                                             \
                                                                         \
         return ret;                                                     \
 }                                                                       \
@@ -193,7 +192,6 @@ static void scmdev_setup(struct scm_device *scmdev, struct sale *sale,
         scmdev->dev.bus = &scm_bus_type;
         scmdev->dev.release = scmdev_release;
         scmdev->dev.groups = scmdev_attr_groups;
-        spin_lock_init(&scmdev->lock);
 }
 
 /*