nvmem: core: Use kobj_to_dev() instead of container_of()

Use kobj_to_dev() instead of container_of()
Signed-off-by: NTian Tao <tiantao6@hisilicon.com>
Signed-off-by: NSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200917134437.16637-3-srinivas.kandagatla@linaro.orgSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/nvmem/core.c

@@ -128,7 +128,7 @@ static ssize_t bin_attr_nvmem_read(struct file *filp, struct kobject *kobj,
 	if (attr->private)
 		dev = attr->private;
 	else
-		dev = container_of(kobj, struct device, kobj);
+		dev = kobj_to_dev(kobj);
 	nvmem = to_nvmem_device(dev);
 
 	/* Stop the user from reading */
@@ -168,7 +168,7 @@ static ssize_t bin_attr_nvmem_write(struct file *filp, struct kobject *kobj,
 	if (attr->private)
 		dev = attr->private;
 	else
-		dev = container_of(kobj, struct device, kobj);
+		dev = kobj_to_dev(kobj);
 	nvmem = to_nvmem_device(dev);
 
 	/* Stop the user from writing */
@@ -219,7 +219,7 @@ static umode_t nvmem_bin_attr_get_umode(struct nvmem_device *nvmem)
 static umode_t nvmem_bin_attr_is_visible(struct kobject *kobj,
 					 struct bin_attribute *attr, int i)
 {
-	struct device *dev = container_of(kobj, struct device, kobj);
+	struct device *dev = kobj_to_dev(kobj);
 	struct nvmem_device *nvmem = to_nvmem_device(dev);
 
 	return nvmem_bin_attr_get_umode(nvmem);