From: Sungho Bae <[email protected]> Refactor virtio_device_restore_priv() by extracting the common device re-initialization sequence into virtio_device_reinit(). This helper performs the full bring-up sequence: reset, status acknowledgment, feature finalization, and feature negotiation.
virtio_device_restore() and virtio_device_reset_done() now each call virtio_device_reinit() directly instead of going through a boolean- dispatched wrapper. This makes each path independently readable and extensible without further complicating the dispatch logic. A follow-up series will add noirq PM callbacks that only affect the restore path; having the two paths separated avoids adding more conditionals to a shared function. No functional change. Signed-off-by: Sungho Bae <[email protected]> --- drivers/virtio/virtio.c | 81 +++++++++++++++++++++++++---------------- 1 file changed, 50 insertions(+), 31 deletions(-) diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c index 5bdc6b82b30b..98f1875f8df1 100644 --- a/drivers/virtio/virtio.c +++ b/drivers/virtio/virtio.c @@ -588,7 +588,7 @@ void unregister_virtio_device(struct virtio_device *dev) } EXPORT_SYMBOL_GPL(unregister_virtio_device); -static int virtio_device_restore_priv(struct virtio_device *dev, bool restore) +static int virtio_device_reinit(struct virtio_device *dev) { struct virtio_driver *drv = drv_to_virtio(dev->dev.driver); int ret; @@ -613,35 +613,9 @@ static int virtio_device_restore_priv(struct virtio_device *dev, bool restore) ret = dev->config->finalize_features(dev); if (ret) - goto err; - - ret = virtio_features_ok(dev); - if (ret) - goto err; - - if (restore) { - if (drv->restore) { - ret = drv->restore(dev); - if (ret) - goto err; - } - } else { - ret = drv->reset_done(dev); - if (ret) - goto err; - } - - /* If restore didn't do it, mark device DRIVER_OK ourselves. */ - if (!(dev->config->get_status(dev) & VIRTIO_CONFIG_S_DRIVER_OK)) - virtio_device_ready(dev); - - virtio_config_core_enable(dev); - - return 0; + return ret; -err: - virtio_add_status(dev, VIRTIO_CONFIG_S_FAILED); - return ret; + return virtio_features_ok(dev); } #ifdef CONFIG_PM_SLEEP @@ -668,7 +642,33 @@ EXPORT_SYMBOL_GPL(virtio_device_freeze); int virtio_device_restore(struct virtio_device *dev) { - return virtio_device_restore_priv(dev, true); + struct virtio_driver *drv = drv_to_virtio(dev->dev.driver); + int ret; + + ret = virtio_device_reinit(dev); + if (ret) + goto err; + + if (!drv) + return 0; + + if (drv->restore) { + ret = drv->restore(dev); + if (ret) + goto err; + } + + /* If restore didn't do it, mark device DRIVER_OK ourselves. */ + if (!(dev->config->get_status(dev) & VIRTIO_CONFIG_S_DRIVER_OK)) + virtio_device_ready(dev); + + virtio_config_core_enable(dev); + + return 0; + +err: + virtio_add_status(dev, VIRTIO_CONFIG_S_FAILED); + return ret; } EXPORT_SYMBOL_GPL(virtio_device_restore); #endif @@ -698,11 +698,30 @@ 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); + int ret; if (!drv || !drv->reset_done) return -EOPNOTSUPP; - return virtio_device_restore_priv(dev, false); + ret = virtio_device_reinit(dev); + if (ret) + goto err; + + ret = drv->reset_done(dev); + if (ret) + goto err; + + /* If reset_done didn't do it, mark device DRIVER_OK ourselves. */ + if (!(dev->config->get_status(dev) & VIRTIO_CONFIG_S_DRIVER_OK)) + virtio_device_ready(dev); + + virtio_config_core_enable(dev); + + return 0; + +err: + virtio_add_status(dev, VIRTIO_CONFIG_S_FAILED); + return ret; } EXPORT_SYMBOL_GPL(virtio_device_reset_done); -- 2.43.0
