Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull virtio fixes from Michael Tsirkin:
 "The biggest thing here is the adminq change - but it looks like the
  only way to avoid headq blocking causing indefinite stalls.

  This fixes three issues:

   - Prevent admin commands on one VF blocking another.

     This prevents a bad VF from blocking a good one, as well as fixing
     a scalability issue with large # of VFs

   - Correctly return error on command failure on octeon. We used to
     treat failed commands as a success.

   - Fix modpost warning when building virtio_dma_buf. Harmless, but the
     fix is trivial"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  virtio_pci_modern: remove admin queue serialization lock
  virtio_pci_modern: use completion instead of busy loop to wait on admin cmd result
  virtio_pci_modern: pass cmd as an identification token
  virtio_pci_modern: create admin queue of queried size
  virtio: create admin queues alongside other virtqueues
  virtio_pci: pass vq info as an argument to vp_setup_vq()
  virtio: push out code to vp_avq_index()
  virtio_pci_modern: treat vp_dev->admin_vq.info.vq pointer as static
  virtio_pci: introduce vector allocation fallback for slow path virtqueues
  virtio_pci: pass vector policy enum to vp_find_one_vq_msix()
  virtio_pci: pass vector policy enum to vp_find_vqs_msix()
  virtio_pci: simplify vp_request_msix_vectors() call a bit
  virtio_pci: push out single vq find code to vp_find_one_vq_msix()
  vdpa/octeon_ep: Fix error code in octep_process_mbox()
  virtio: add missing MODULE_DESCRIPTION() macro

Author: torvalds

drivers/vdpa/octeon_ep/octep_vdpa_hw.c

@@ -140,7 +140,7 @@ static int octep_process_mbox(struct octep_hw *oct_hw, u16 id, u16 qid, void *bu
 	val = octep_read_sig(mbox);
 	if ((val & 0xFFFF) != MBOX_RSP_SIG) {
 		dev_warn(&pdev->dev, "Invalid Signature from mbox : %d response\n", id);
-		return ret;
+		return -EINVAL;
 	}
 
 	val = octep_read_sts(mbox);

drivers/virtio/virtio.c

@@ -305,15 +305,9 @@ static int virtio_dev_probe(struct device *_d)
 	if (err)
 		goto err;
 
-	if (dev->config->create_avq) {
-		err = dev->config->create_avq(dev);
-		if (err)
-			goto err;
-	}
-
 	err = drv->probe(dev);
 	if (err)
-		goto err_probe;
+		goto err;
 
 	/* If probe didn't do it, mark device DRIVER_OK ourselves. */
 	if (!(dev->config->get_status(dev) & VIRTIO_CONFIG_S_DRIVER_OK))
@@ -326,9 +320,6 @@ static int virtio_dev_probe(struct device *_d)
 
 	return 0;
 
-err_probe:
-	if (dev->config->destroy_avq)
-		dev->config->destroy_avq(dev);
 err:
 	virtio_add_status(dev, VIRTIO_CONFIG_S_FAILED);
 	return err;
@@ -344,9 +335,6 @@ static void virtio_dev_remove(struct device *_d)
 
 	drv->remove(dev);
 
-	if (dev->config->destroy_avq)
-		dev->config->destroy_avq(dev);
-
 	/* Driver should have reset device. */
 	WARN_ON_ONCE(dev->config->get_status(dev));
 
@@ -524,9 +512,6 @@ int virtio_device_freeze(struct virtio_device *dev)
 		}
 	}
 
-	if (dev->config->destroy_avq)
-		dev->config->destroy_avq(dev);
-
 	return 0;
 }
 EXPORT_SYMBOL_GPL(virtio_device_freeze);
@@ -562,16 +547,10 @@ int virtio_device_restore(struct virtio_device *dev)
 	if (ret)
 		goto err;
 
-	if (dev->config->create_avq) {
-		ret = dev->config->create_avq(dev);
-		if (ret)
-			goto err;
-	}
-
 	if (drv->restore) {
 		ret = drv->restore(dev);
 		if (ret)
-			goto err_restore;
+			goto err;
 	}
 
 	/* If restore didn't do it, mark device DRIVER_OK ourselves. */
@@ -582,9 +561,6 @@ int virtio_device_restore(struct virtio_device *dev)
 
 	return 0;
 
-err_restore:
-	if (dev->config->destroy_avq)
-		dev->config->destroy_avq(dev);
 err:
 	virtio_add_status(dev, VIRTIO_CONFIG_S_FAILED);
 	return ret;