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virtio: use dev_to_virtio wrapper in virtio 

Use dev_to_virtio wrapper in virtio to make code clearly.

Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Wanlong Gao 2012-12-11 11:04:50 +10:30 committed by Rusty Russell
parent 40f9938c4c
commit 9bffdca8c6
2 changed files with 14 additions and 11 deletions
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19
drivers/virtio/virtio.c
View File

@ -10,33 +10,32 @@ static DEFINE_IDA(virtio_index_ida);
static ssize_t device_show(struct device *_d,
struct device_attribute *attr, char *buf)
{
struct virtio_device *dev = container_of(_d,struct virtio_device,dev);
struct virtio_device *dev = dev_to_virtio(_d);
return sprintf(buf, "0x%04x\n", dev->id.device);
}
static ssize_t vendor_show(struct device *_d,
struct device_attribute *attr, char *buf)
{
struct virtio_device *dev = container_of(_d,struct virtio_device,dev);
struct virtio_device *dev = dev_to_virtio(_d);
return sprintf(buf, "0x%04x\n", dev->id.vendor);
}
static ssize_t status_show(struct device *_d,
struct device_attribute *attr, char *buf)
{
struct virtio_device *dev = container_of(_d,struct virtio_device,dev);
struct virtio_device *dev = dev_to_virtio(_d);
return sprintf(buf, "0x%08x\n", dev->config->get_status(dev));
}
static ssize_t modalias_show(struct device *_d,
struct device_attribute *attr, char *buf)
{
struct virtio_device *dev = container_of(_d,struct virtio_device,dev);
struct virtio_device *dev = dev_to_virtio(_d);
return sprintf(buf, "virtio:d%08Xv%08X\n",
dev->id.device, dev->id.vendor);
}
static ssize_t features_show(struct device *_d,
struct device_attribute *attr, char *buf)
{
struct virtio_device *dev = container_of(_d, struct virtio_device, dev);
struct virtio_device *dev = dev_to_virtio(_d);
unsigned int i;
ssize_t len = 0;
@ -71,7 +70,7 @@ static inline int virtio_id_match(const struct virtio_device *dev,
static int virtio_dev_match(struct device *_dv, struct device_driver *_dr)
{
unsigned int i;
struct virtio_device *dev = container_of(_dv,struct virtio_device,dev);
struct virtio_device *dev = dev_to_virtio(_dv);
const struct virtio_device_id *ids;
ids = container_of(_dr, struct virtio_driver, driver)->id_table;
@ -83,7 +82,7 @@ static int virtio_dev_match(struct device *_dv, struct device_driver *_dr)
static int virtio_uevent(struct device *_dv, struct kobj_uevent_env *env)
{
struct virtio_device *dev = container_of(_dv,struct virtio_device,dev);
struct virtio_device *dev = dev_to_virtio(_dv);
return add_uevent_var(env, "MODALIAS=virtio:d%08Xv%08X",
dev->id.device, dev->id.vendor);
@ -111,7 +110,7 @@ EXPORT_SYMBOL_GPL(virtio_check_driver_offered_feature);
static int virtio_dev_probe(struct device *_d)
{
int err, i;
struct virtio_device *dev = container_of(_d,struct virtio_device,dev);
struct virtio_device *dev = dev_to_virtio(_d);
struct virtio_driver *drv = container_of(dev->dev.driver,
struct virtio_driver, driver);
u32 device_features;
@ -152,7 +151,7 @@ static int virtio_dev_probe(struct device *_d)
static int virtio_dev_remove(struct device *_d)
{
struct virtio_device *dev = container_of(_d,struct virtio_device,dev);
struct virtio_device *dev = dev_to_virtio(_d);
struct virtio_driver *drv = container_of(dev->dev.driver,
struct virtio_driver, driver);

6
include/linux/virtio.h
View File

@ -85,7 +85,11 @@ struct virtio_device {
void *priv;
};
#define dev_to_virtio(dev) container_of(dev, struct virtio_device, dev)
static inline struct virtio_device *dev_to_virtio(struct device *_dev)
{
return container_of(_dev, struct virtio_device, dev);
}
int register_virtio_device(struct virtio_device *dev);
void unregister_virtio_device(struct virtio_device *dev);