Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging

pc,pci,virtio: fixes, cleanups

Fixes, cleanups all over the place.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

# gpg: Signature made Sat 04 Sep 2021 22:34:10 BST
# gpg:                using RSA key 5D09FD0871C8F85B94CA8A0D281F0DB8D28D5469
# gpg:                issuer "mst@redhat.com"
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [full]
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>" [full]
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17  0970 C350 3912 AFBE 8E67
#      Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA  8A0D 281F 0DB8 D28D 5469

* remotes/mst/tags/for_upstream: (35 commits)
  vhost-vdpa: remove the unncessary queue_index assignment
  vhost-vdpa: fix the wrong assertion in vhost_vdpa_init()
  vhost-vdpa: tweak the error label in vhost_vdpa_add()
  vhost-vdpa: fix leaking of vhost_net in vhost_vdpa_add()
  vhost-vdpa: don't cleanup twice in vhost_vdpa_add()
  vhost-vdpa: remove the unnecessary check in vhost_vdpa_add()
  vhost_net: do not assume nvqs is always 2
  vhost: use unsigned int for nvqs
  vhost_net: remove the meaningless assignment in vhost_net_start_one()
  vhost-vdpa: correctly return err in vhost_vdpa_set_backend_cap()
  vhost-vdpa: remove unused variable "acked_features"
  tests/vhost-user-bridge.c: Fix typo in help message
  tests/vhost-user-bridge.c: Sanity check socket path length
  hw/virtio: Add flatview update in vhost_user_cleanup()
  hw/virtio: Remove NULL check in virtio_free_region_cache()
  hw/virtio: Document virtio_queue_packed_empty_rcu is called within RCU
  MAINTAINERS: Added myself as a reviewer for acpi/smbios subsystem
  hw/acpi: use existing references to pci device struct within functions
  hw/pci: remove all references to find_i440fx function
  hw/i386/acpi-build: Get NUMA information from struct NumaState
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 3 insertions, 4 deletions

diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 874377f37a..3a1f6c520c 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -133,12 +133,10 @@ struct VirtQueue
     QLIST_ENTRY(VirtQueue) node;
 };
 
+/* Called within call_rcu().  */
 static void virtio_free_region_cache(VRingMemoryRegionCaches *caches)
 {
-    if (!caches) {
-        return;
-    }
-
+    assert(caches != NULL);
     address_space_cache_destroy(&caches->desc);
     address_space_cache_destroy(&caches->avail);
     address_space_cache_destroy(&caches->used);
@@ -634,6 +632,7 @@ static int virtio_queue_split_empty(VirtQueue *vq)
     return empty;
 }
 
+/* Called within rcu_read_lock().  */
 static int virtio_queue_packed_empty_rcu(VirtQueue *vq)
 {
     struct VRingPackedDesc desc;