linux-kernel - [PATCH 2/2] Revert "virtio_config: introduce a new .enable

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Date:   Wed, 30 Mar 2022 02:23:30 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     Jason Wang <jasowang@...hat.com>,
        virtualization@...ts.linux-foundation.org
Subject: [PATCH 2/2] Revert "virtio_config: introduce a new .enable_cbs
 method"

This reverts commit d50497eb4e554e1f0351e1836ee7241c059592e6.

The new callback ended up not being used, and it's asymmetrical:
just enable, no disable.

Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
---
 include/linux/virtio_config.h | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
index dafdc7f48c01..b341dd62aa4d 100644
--- a/include/linux/virtio_config.h
+++ b/include/linux/virtio_config.h
@@ -23,8 +23,6 @@ struct virtio_shm_region {
  *       any of @get/@set, @get_status/@..._status, or @get_features/
  *       @finalize_features are NOT safe to be called from an atomic
  *       context.
- * @enable_cbs: enable the callbacks
- *      vdev: the virtio_device
  * @get: read the value of a configuration field
  *	vdev: the virtio_device
  *	offset: the offset of the configuration field
@@ -78,7 +76,6 @@ struct virtio_shm_region {
  */
 typedef void vq_callback_t(struct virtqueue *);
 struct virtio_config_ops {
-	void (*enable_cbs)(struct virtio_device *vdev);
 	void (*get)(struct virtio_device *vdev, unsigned offset,
 		    void *buf, unsigned len);
 	void (*set)(struct virtio_device *vdev, unsigned offset,
@@ -233,9 +230,6 @@ void virtio_device_ready(struct virtio_device *dev)
 {
 	unsigned status = dev->config->get_status(dev);
 
-	if (dev->config->enable_cbs)
-                  dev->config->enable_cbs(dev);
-
 	BUG_ON(status & VIRTIO_CONFIG_S_DRIVER_OK);
 	dev->config->set_status(dev, status | VIRTIO_CONFIG_S_DRIVER_OK);
 }
-- 
MST