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authorWanlong Gao <gaowanlong@cn.fujitsu.com>2012-12-10 16:38:33 +0800
committerRusty Russell <rusty@rustcorp.com.au>2012-12-18 15:20:43 +1030
commit9a2bdcc85d28506d4e5d4a9618fb133a3f40945d (patch)
treeac571e092d7542a5c5121d25b5f8f02cdfbb7a41 /drivers/virtio
parent9bffdca8c64a72ac54c47a552734ab457bc720d4 (diff)
downloadlwn-9a2bdcc85d28506d4e5d4a9618fb133a3f40945d.tar.gz
lwn-9a2bdcc85d28506d4e5d4a9618fb133a3f40945d.zip
virtio: add drv_to_virtio to make code clearly
Add drv_to_virtio wrapper to get virtio_driver from device_driver. 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>
Diffstat (limited to 'drivers/virtio')
-rw-r--r--drivers/virtio/virtio.c11
1 files changed, 4 insertions, 7 deletions
diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c
index 1346ae8e14f3..1c01ac3fad08 100644
--- a/drivers/virtio/virtio.c
+++ b/drivers/virtio/virtio.c
@@ -73,7 +73,7 @@ static int virtio_dev_match(struct device *_dv, struct device_driver *_dr)
struct virtio_device *dev = dev_to_virtio(_dv);
const struct virtio_device_id *ids;
- ids = container_of(_dr, struct virtio_driver, driver)->id_table;
+ ids = drv_to_virtio(_dr)->id_table;
for (i = 0; ids[i].device; i++)
if (virtio_id_match(dev, &ids[i]))
return 1;
@@ -97,8 +97,7 @@ void virtio_check_driver_offered_feature(const struct virtio_device *vdev,
unsigned int fbit)
{
unsigned int i;
- struct virtio_driver *drv = container_of(vdev->dev.driver,
- struct virtio_driver, driver);
+ struct virtio_driver *drv = drv_to_virtio(vdev->dev.driver);
for (i = 0; i < drv->feature_table_size; i++)
if (drv->feature_table[i] == fbit)
@@ -111,8 +110,7 @@ static int virtio_dev_probe(struct device *_d)
{
int err, i;
struct virtio_device *dev = dev_to_virtio(_d);
- struct virtio_driver *drv = container_of(dev->dev.driver,
- struct virtio_driver, driver);
+ struct virtio_driver *drv = drv_to_virtio(dev->dev.driver);
u32 device_features;
/* We have a driver! */
@@ -152,8 +150,7 @@ static int virtio_dev_probe(struct device *_d)
static int virtio_dev_remove(struct device *_d)
{
struct virtio_device *dev = dev_to_virtio(_d);
- struct virtio_driver *drv = container_of(dev->dev.driver,
- struct virtio_driver, driver);
+ struct virtio_driver *drv = drv_to_virtio(dev->dev.driver);
drv->remove(dev);