drm/i915: use kobj_to_dev()

Use kobj_to_dev() instead of open-coding it.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/f5db8b56cd177972c901d01aa87ba763735438a9.1452696179.git.geliangtang@163.com

diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c
index 37e3f0ddf8e04ac8a79e1eec2cf6ae171812c0b8..c6188dddb3414dd20188776ad63a70505ab293cb 100644 (file)
--- a/drivers/gpu/drm/i915/i915_sysfs.c
+++ b/drivers/gpu/drm/i915/i915_sysfs.c
@@ -164,7 +164,7 @@ i915_l3_read(struct file *filp, struct kobject *kobj,
             struct bin_attribute *attr, char *buf,
             loff_t offset, size_t count)
 {
-       struct device *dev = container_of(kobj, struct device, kobj);
+       struct device *dev = kobj_to_dev(kobj);
        struct drm_minor *dminor = dev_to_drm_minor(dev);
        struct drm_device *drm_dev = dminor->dev;
        struct drm_i915_private *dev_priv = drm_dev->dev_private;
@@ -200,7 +200,7 @@ i915_l3_write(struct file *filp, struct kobject *kobj,
              struct bin_attribute *attr, char *buf,
              loff_t offset, size_t count)
 {
-       struct device *dev = container_of(kobj, struct device, kobj);
+       struct device *dev = kobj_to_dev(kobj);
        struct drm_minor *dminor = dev_to_drm_minor(dev);
        struct drm_device *drm_dev = dminor->dev;
        struct drm_i915_private *dev_priv = drm_dev->dev_private;
@@ -521,7 +521,7 @@ static ssize_t error_state_read(struct file *filp, struct kobject *kobj,
                                loff_t off, size_t count)
 {
 
-       struct device *kdev = container_of(kobj, struct device, kobj);
+       struct device *kdev = kobj_to_dev(kobj);
        struct drm_minor *minor = dev_to_drm_minor(kdev);
        struct drm_device *dev = minor->dev;
        struct i915_error_state_file_priv error_priv;
@@ -556,7 +556,7 @@ static ssize_t error_state_write(struct file *file, struct kobject *kobj,
                                 struct bin_attribute *attr, char *buf,
                                 loff_t off, size_t count)
 {
-       struct device *kdev = container_of(kobj, struct device, kobj);
+       struct device *kdev = kobj_to_dev(kobj);
        struct drm_minor *minor = dev_to_drm_minor(kdev);
        struct drm_device *dev = minor->dev;
        int ret;