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path: root/drivers/virtio/virtio.c
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Diffstat (limited to 'drivers/virtio/virtio.c')
-rw-r--r--drivers/virtio/virtio.c94
1 files changed, 69 insertions, 25 deletions
diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c
index b10ed9f5b543..ba37665188b5 100644
--- a/drivers/virtio/virtio.c
+++ b/drivers/virtio/virtio.c
@@ -546,29 +546,7 @@ void unregister_virtio_device(struct virtio_device *dev)
}
EXPORT_SYMBOL_GPL(unregister_virtio_device);
-#ifdef CONFIG_PM_SLEEP
-int virtio_device_freeze(struct virtio_device *dev)
-{
- struct virtio_driver *drv = drv_to_virtio(dev->dev.driver);
- int ret;
-
- virtio_config_core_disable(dev);
-
- dev->failed = dev->config->get_status(dev) & VIRTIO_CONFIG_S_FAILED;
-
- if (drv && drv->freeze) {
- ret = drv->freeze(dev);
- if (ret) {
- virtio_config_core_enable(dev);
- return ret;
- }
- }
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(virtio_device_freeze);
-
-int virtio_device_restore(struct virtio_device *dev)
+static int virtio_device_restore_priv(struct virtio_device *dev, bool restore)
{
struct virtio_driver *drv = drv_to_virtio(dev->dev.driver);
int ret;
@@ -599,8 +577,14 @@ int virtio_device_restore(struct virtio_device *dev)
if (ret)
goto err;
- if (drv->restore) {
- ret = drv->restore(dev);
+ if (restore) {
+ if (drv->restore) {
+ ret = drv->restore(dev);
+ if (ret)
+ goto err;
+ }
+ } else {
+ ret = drv->reset_done(dev);
if (ret)
goto err;
}
@@ -617,9 +601,69 @@ err:
virtio_add_status(dev, VIRTIO_CONFIG_S_FAILED);
return ret;
}
+
+#ifdef CONFIG_PM_SLEEP
+int virtio_device_freeze(struct virtio_device *dev)
+{
+ struct virtio_driver *drv = drv_to_virtio(dev->dev.driver);
+ int ret;
+
+ virtio_config_core_disable(dev);
+
+ dev->failed = dev->config->get_status(dev) & VIRTIO_CONFIG_S_FAILED;
+
+ if (drv && drv->freeze) {
+ ret = drv->freeze(dev);
+ if (ret) {
+ virtio_config_core_enable(dev);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(virtio_device_freeze);
+
+int virtio_device_restore(struct virtio_device *dev)
+{
+ return virtio_device_restore_priv(dev, true);
+}
EXPORT_SYMBOL_GPL(virtio_device_restore);
#endif
+int virtio_device_reset_prepare(struct virtio_device *dev)
+{
+ struct virtio_driver *drv = drv_to_virtio(dev->dev.driver);
+ int ret;
+
+ if (!drv || !drv->reset_prepare)
+ return -EOPNOTSUPP;
+
+ virtio_config_core_disable(dev);
+
+ dev->failed = dev->config->get_status(dev) & VIRTIO_CONFIG_S_FAILED;
+
+ ret = drv->reset_prepare(dev);
+ if (ret) {
+ virtio_config_core_enable(dev);
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(virtio_device_reset_prepare);
+
+int virtio_device_reset_done(struct virtio_device *dev)
+{
+ struct virtio_driver *drv = drv_to_virtio(dev->dev.driver);
+
+ if (!drv || !drv->reset_done)
+ return -EOPNOTSUPP;
+
+ return virtio_device_restore_priv(dev, false);
+}
+EXPORT_SYMBOL_GPL(virtio_device_reset_done);
+
static int virtio_init(void)
{
if (bus_register(&virtio_bus) != 0)