forked from Minki/linux
virtio: wrap config->reset calls
This will enable cleanups down the road. The idea is to disable cbs, then add "flush_queued_cbs" callback as a parameter, this way drivers can flush any work queued after callbacks have been disabled. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Link: https://lore.kernel.org/r/20211013105226.20225-1-mst@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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c9e6606c7f
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d9679d0013
@ -616,7 +616,7 @@ static void um_pci_virtio_remove(struct virtio_device *vdev)
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int i;
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/* Stop all virtqueues */
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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vdev->config->del_vqs(vdev);
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device_set_wakeup_enable(&vdev->dev, false);
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@ -977,7 +977,7 @@ static void virtblk_remove(struct virtio_device *vdev)
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mutex_lock(&vblk->vdev_mutex);
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/* Stop all the virtqueues. */
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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/* Virtqueues are stopped, nothing can use vblk->vdev anymore. */
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vblk->vdev = NULL;
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@ -996,7 +996,7 @@ static int virtblk_freeze(struct virtio_device *vdev)
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struct virtio_blk *vblk = vdev->priv;
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/* Ensure we don't receive any more interrupts */
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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/* Make sure no work handler is accessing the device. */
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flush_work(&vblk->config_work);
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@ -364,7 +364,7 @@ static void virtbt_remove(struct virtio_device *vdev)
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struct hci_dev *hdev = vbt->hdev;
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hci_unregister_dev(hdev);
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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hci_free_dev(hdev);
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vbt->hdev = NULL;
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@ -179,7 +179,7 @@ static void remove_common(struct virtio_device *vdev)
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vi->data_avail = 0;
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vi->data_idx = 0;
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complete(&vi->have_data);
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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if (vi->hwrng_register_done)
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hwrng_unregister(&vi->hwrng);
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vdev->config->del_vqs(vdev);
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@ -1958,7 +1958,7 @@ static void virtcons_remove(struct virtio_device *vdev)
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spin_unlock_irq(&pdrvdata_lock);
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/* Disable interrupts for vqs */
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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/* Finish up work that's lined up */
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if (use_multiport(portdev))
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cancel_work_sync(&portdev->control_work);
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@ -2148,7 +2148,7 @@ static int virtcons_freeze(struct virtio_device *vdev)
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portdev = vdev->priv;
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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if (use_multiport(portdev))
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virtqueue_disable_cb(portdev->c_ivq);
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@ -404,7 +404,7 @@ static int virtcrypto_probe(struct virtio_device *vdev)
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free_engines:
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virtcrypto_clear_crypto_engines(vcrypto);
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free_vqs:
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vcrypto->vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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virtcrypto_del_vqs(vcrypto);
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free_dev:
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virtcrypto_devmgr_rm_dev(vcrypto);
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@ -436,7 +436,7 @@ static void virtcrypto_remove(struct virtio_device *vdev)
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if (virtcrypto_dev_started(vcrypto))
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virtcrypto_dev_stop(vcrypto);
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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virtcrypto_free_unused_reqs(vcrypto);
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virtcrypto_clear_crypto_engines(vcrypto);
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virtcrypto_del_vqs(vcrypto);
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@ -456,7 +456,7 @@ static int virtcrypto_freeze(struct virtio_device *vdev)
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{
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struct virtio_crypto *vcrypto = vdev->priv;
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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virtcrypto_free_unused_reqs(vcrypto);
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if (virtcrypto_dev_started(vcrypto))
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virtcrypto_dev_stop(vcrypto);
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@ -492,7 +492,7 @@ static int virtcrypto_restore(struct virtio_device *vdev)
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free_engines:
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virtcrypto_clear_crypto_engines(vcrypto);
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free_vqs:
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vcrypto->vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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virtcrypto_del_vqs(vcrypto);
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return err;
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}
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@ -452,7 +452,7 @@ static void scmi_vio_remove(struct virtio_device *vdev)
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* outstanding message on any vqueue to be ignored by complete_cb: now
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* we can just stop processing buffers and destroy the vqueues.
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*/
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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vdev->config->del_vqs(vdev);
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/* Ensure scmi_vdev is visible as NULL */
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smp_store_mb(scmi_vdev, NULL);
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@ -450,7 +450,7 @@ static void virtio_gpio_request_vq(struct virtqueue *vq)
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static void virtio_gpio_free_vqs(struct virtio_device *vdev)
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{
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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vdev->config->del_vqs(vdev);
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}
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@ -279,7 +279,7 @@ void virtio_gpu_deinit(struct drm_device *dev)
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flush_work(&vgdev->ctrlq.dequeue_work);
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flush_work(&vgdev->cursorq.dequeue_work);
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flush_work(&vgdev->config_changed_work);
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vgdev->vdev->config->reset(vgdev->vdev);
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virtio_reset_device(vgdev->vdev);
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vgdev->vdev->config->del_vqs(vgdev->vdev);
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}
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@ -165,7 +165,7 @@ err_free:
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static void virtio_i2c_del_vqs(struct virtio_device *vdev)
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{
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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vdev->config->del_vqs(vdev);
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}
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@ -1115,7 +1115,7 @@ static void viommu_remove(struct virtio_device *vdev)
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iommu_device_unregister(&viommu->iommu);
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/* Stop all virtqueues */
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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vdev->config->del_vqs(vdev);
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dev_info(&vdev->dev, "device removed\n");
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@ -754,7 +754,7 @@ static void cfv_remove(struct virtio_device *vdev)
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debugfs_remove_recursive(cfv->debugfs);
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vringh_kiov_cleanup(&cfv->ctx.riov);
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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vdev->vringh_config->del_vrhs(cfv->vdev);
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cfv->vr_rx = NULL;
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vdev->config->del_vqs(cfv->vdev);
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@ -3310,7 +3310,7 @@ static int virtnet_probe(struct virtio_device *vdev)
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return 0;
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free_unregister_netdev:
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vi->vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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unregister_netdev(dev);
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free_failover:
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@ -3326,7 +3326,7 @@ free:
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static void remove_vq_common(struct virtnet_info *vi)
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{
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vi->vdev->config->reset(vi->vdev);
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virtio_reset_device(vi->vdev);
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/* Free unused buffers in both send and recv, if any. */
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free_unused_bufs(vi);
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@ -4498,7 +4498,7 @@ static void remove_vqs(struct virtio_device *vdev)
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{
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int i;
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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for (i = 0; i < ARRAY_SIZE(hwsim_vqs); i++) {
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struct virtqueue *vq = hwsim_vqs[i];
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@ -105,7 +105,7 @@ static void virtio_pmem_remove(struct virtio_device *vdev)
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nvdimm_bus_unregister(nvdimm_bus);
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vdev->config->del_vqs(vdev);
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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}
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static struct virtio_driver virtio_pmem_driver = {
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@ -1024,7 +1024,7 @@ static void rpmsg_remove(struct virtio_device *vdev)
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size_t total_buf_space = vrp->num_bufs * vrp->buf_size;
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int ret;
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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ret = device_for_each_child(&vdev->dev, NULL, rpmsg_remove_device);
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if (ret)
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@ -778,7 +778,7 @@ static void virtscsi_init_vq(struct virtio_scsi_vq *virtscsi_vq,
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static void virtscsi_remove_vqs(struct virtio_device *vdev)
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{
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/* Stop all the virtqueues. */
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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vdev->config->del_vqs(vdev);
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}
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@ -204,6 +204,12 @@ int virtio_finalize_features(struct virtio_device *dev)
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}
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EXPORT_SYMBOL_GPL(virtio_finalize_features);
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void virtio_reset_device(struct virtio_device *dev)
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{
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dev->config->reset(dev);
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}
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EXPORT_SYMBOL_GPL(virtio_reset_device);
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static int virtio_dev_probe(struct device *_d)
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{
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int err, i;
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@ -1056,7 +1056,7 @@ static void remove_common(struct virtio_balloon *vb)
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return_free_pages_to_mm(vb, ULONG_MAX);
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/* Now we reset the device so we can clean up the queues. */
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vb->vdev->config->reset(vb->vdev);
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virtio_reset_device(vb->vdev);
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vb->vdev->config->del_vqs(vb->vdev);
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}
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@ -347,7 +347,7 @@ static void virtinput_remove(struct virtio_device *vdev)
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spin_unlock_irqrestore(&vi->lock, flags);
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input_unregister_device(vi->idev);
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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while ((buf = virtqueue_detach_unused_buf(vi->sts)) != NULL)
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kfree(buf);
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vdev->config->del_vqs(vdev);
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@ -2850,7 +2850,7 @@ static void virtio_mem_remove(struct virtio_device *vdev)
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virtio_mem_deinit_hotplug(vm);
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/* reset the device and cleanup the queues */
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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vdev->config->del_vqs(vdev);
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kfree(vm);
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@ -895,7 +895,7 @@ static int virtio_fs_probe(struct virtio_device *vdev)
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return 0;
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out_vqs:
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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virtio_fs_cleanup_vqs(vdev, fs);
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kfree(fs->vqs);
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@ -927,7 +927,7 @@ static void virtio_fs_remove(struct virtio_device *vdev)
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list_del_init(&fs->list);
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virtio_fs_stop_all_queues(fs);
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virtio_fs_drain_all_queues_locked(fs);
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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virtio_fs_cleanup_vqs(vdev, fs);
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vdev->priv = NULL;
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@ -138,6 +138,7 @@ int virtio_finalize_features(struct virtio_device *dev);
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int virtio_device_freeze(struct virtio_device *dev);
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int virtio_device_restore(struct virtio_device *dev);
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#endif
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void virtio_reset_device(struct virtio_device *dev);
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size_t virtio_max_dma_size(struct virtio_device *vdev);
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@ -721,7 +721,7 @@ static void p9_virtio_remove(struct virtio_device *vdev)
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mutex_unlock(&virtio_9p_lock);
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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vdev->config->del_vqs(vdev);
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sysfs_remove_file(&(vdev->dev.kobj), &dev_attr_mount_tag.attr);
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@ -665,7 +665,7 @@ static void virtio_vsock_remove(struct virtio_device *vdev)
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vsock_for_each_connected_socket(virtio_vsock_reset_sock);
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/* Stop all work handlers to make sure no one is accessing the device,
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* so we can safely call vdev->config->reset().
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* so we can safely call virtio_reset_device().
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*/
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mutex_lock(&vsock->rx_lock);
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vsock->rx_run = false;
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@ -682,7 +682,7 @@ static void virtio_vsock_remove(struct virtio_device *vdev)
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/* Flush all device writes and interrupts, device will not use any
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* more buffers.
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*/
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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mutex_lock(&vsock->rx_lock);
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while ((pkt = virtqueue_detach_unused_buf(vsock->vqs[VSOCK_VQ_RX])))
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@ -350,7 +350,7 @@ static void virtsnd_remove(struct virtio_device *vdev)
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snd_card_free(snd->card);
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vdev->config->del_vqs(vdev);
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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for (i = 0; snd->substreams && i < snd->nsubstreams; ++i) {
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struct virtio_pcm_substream *vss = &snd->substreams[i];
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@ -379,7 +379,7 @@ static int virtsnd_freeze(struct virtio_device *vdev)
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virtsnd_ctl_msg_cancel_all(snd);
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vdev->config->del_vqs(vdev);
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vdev->config->reset(vdev);
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virtio_reset_device(vdev);
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for (i = 0; i < snd->nsubstreams; ++i)
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cancel_work_sync(&snd->substreams[i].elapsed_period);
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