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hw/display/virtio-gpu: Avoid mmap() for empty blob

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Calling mmap() for an empty blob fails with EINVAL, causing QEMU to
emit a spurious warning.

Fixes: e0933d91b1 ("virtio-gpu: Add virtio_gpu_resource_create_blob")
Signed-off-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-ID: <20260825-dmabuf-v2-2-b3d64d3b9a0e@rsg.ci.i.u-tokyo.ac.jp>
This commit is contained in:
Akihiko Odaki 2026-08-25 16:28:48 +09:00 • committed by Marc-André Lureau
parent 14f2511f59
commit 3f163489c6
1 changed files with 1 additions and 1 deletions
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2
hw/display/virtio-gpu-udmabuf.c
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@ -139,7 +139,7 @@ void virtio_gpu_init_udmabuf(struct virtio_gpu_simple_resource *res)
if (res->iov_cnt == 1 &&
res->iov[0].iov_len < 4096) {
pdata = res->iov[0].iov_base;
} else {
} else if (res->blob_size) {
virtio_gpu_create_udmabuf(res);
if (res->dmabuf_fd < 0) {
return;