[PATCH v13 3/9] virtio-gpu-dmabuf: Remove rcu_read_lock/unlock from virtio_gpu_create_udmabuf()

[Vivek Kasireddy <vivek.kasireddy@intel.com>]

There is no need to wrap the call to qemu_ram_block_from_host() with
rcu_read_lock/unlock as we already hold a reference to the memory
region that owns the ram block. Note that, the reference was obtained
via dma_memory_map() while creating the mapping.

Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
Cc: Alex Bennée <alex.bennee@linaro.org>
Cc: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>
Cc: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Cc: Alex Williamson <alex@shazbot.org>
Cc: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
---
 hw/display/virtio-gpu-dmabuf.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/hw/display/virtio-gpu-dmabuf.c b/hw/display/virtio-gpu-dmabuf.c
index c537ec0a8c..0ed8d9250e 100644
--- a/hw/display/virtio-gpu-dmabuf.c
+++ b/hw/display/virtio-gpu-dmabuf.c
@@ -46,10 +46,7 @@ static void virtio_gpu_create_udmabuf(struct virtio_gpu_simple_resource *res)
     }
 
     for (i = 0; i < res->iov_cnt; i++) {
-        rcu_read_lock();
         rb = qemu_ram_block_from_host(res->iov[i].iov_base, false, &offset);
-        rcu_read_unlock();
-
         if (!rb || rb->fd < 0) {
             g_free(list);
             return;
-- 
2.53.0