From 5c609a5ef05d98e26778824ba84581fe5e400db6 Mon Sep 17 00:00:00 2001 From: "Michael S. Tsirkin" Date: Thu, 4 Dec 2014 20:20:27 +0200 Subject: virtio: allow finalize_features to fail This will make it easy for transports to validate features and return failure. Signed-off-by: Michael S. Tsirkin --- drivers/virtio/virtio.c | 21 ++++++++++++++------- 1 file changed, 14 insertions(+), 7 deletions(-) (limited to 'drivers/virtio/virtio.c') diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c index 224f85442f3f..e1673a511d17 100644 --- a/drivers/virtio/virtio.c +++ b/drivers/virtio/virtio.c @@ -212,7 +212,9 @@ static int virtio_dev_probe(struct device *_d) if (device_features & (1ULL << i)) __virtio_set_bit(dev, i); - dev->config->finalize_features(dev); + err = dev->config->finalize_features(dev); + if (err) + goto err; if (virtio_has_feature(dev, VIRTIO_F_VERSION_1)) { add_status(dev, VIRTIO_CONFIG_S_FEATURES_OK); @@ -354,6 +356,7 @@ EXPORT_SYMBOL_GPL(virtio_device_freeze); int virtio_device_restore(struct virtio_device *dev) { struct virtio_driver *drv = drv_to_virtio(dev->dev.driver); + int ret; /* We always start by resetting the device, in case a previous * driver messed it up. */ @@ -373,14 +376,14 @@ int virtio_device_restore(struct virtio_device *dev) /* We have a driver! */ add_status(dev, VIRTIO_CONFIG_S_DRIVER); - dev->config->finalize_features(dev); + ret = dev->config->finalize_features(dev); + if (ret) + goto err; if (drv->restore) { - int ret = drv->restore(dev); - if (ret) { - add_status(dev, VIRTIO_CONFIG_S_FAILED); - return ret; - } + ret = drv->restore(dev); + if (ret) + goto err; } /* Finally, tell the device we're all set */ @@ -389,6 +392,10 @@ int virtio_device_restore(struct virtio_device *dev) virtio_config_enable(dev); return 0; + +err: + add_status(dev, VIRTIO_CONFIG_S_FAILED); + return ret; } EXPORT_SYMBOL_GPL(virtio_device_restore); #endif -- cgit v1.2.3