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 <[email protected]> Cc: Alex Bennée <[email protected]> Cc: Akihiko Odaki <[email protected]> Cc: Dmitry Osipenko <[email protected]> Cc: Alex Williamson <[email protected]> Cc: Cédric Le Goater <[email protected]> Reviewed-by: Akihiko Odaki <[email protected]> Signed-off-by: Vivek Kasireddy <[email protected]> --- 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
