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drm/virtio: Handle drm_crtc_init_with_planes() errors

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Return value of function drm_crtc_init_with_planes(),
called by vgdev_output_init(), is not checked,
but it is usually checked for this function.

Found by Linux Verification Center (linuxtesting.org) with SVACE.
Signed-off-by: Alexandr Sapozhnikov <alsp705@gmail.com>
Reviewed-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
[dmitry.osipenko@collabora.com: coding style fix, edit commit message]
Link: https://lore.kernel.org/r/20250922144418.41-1-alsp705@gmail.com
This commit is contained in:
Alexandr Sapozhnikov
2025-09-22 17:44:13 +03:00
committed by Dmitry Osipenko
parent 40527034d1
commit dc84dbcc54
1 changed files with 5 additions and 2 deletions
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7
drivers/gpu/drm/virtio/virtgpu_display.c
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@@ -257,6 +257,7 @@ static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index)
struct drm_encoder *encoder = &output->enc;
struct drm_crtc *crtc = &output->crtc;
struct drm_plane *primary, *cursor;
int ret;
output->index = index;
if (index == 0) {
@@ -271,8 +272,10 @@ static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index)
cursor = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_CURSOR, index);
if (IS_ERR(cursor))
return PTR_ERR(cursor);
drm_crtc_init_with_planes(dev, crtc, primary, cursor,
&virtio_gpu_crtc_funcs, NULL);
ret = drm_crtc_init_with_planes(dev, crtc, primary, cursor,
&virtio_gpu_crtc_funcs, NULL);
if (ret)
return ret;
drm_crtc_helper_add(crtc, &virtio_gpu_crtc_helper_funcs);
drm_connector_init(dev, connector, &virtio_gpu_connector_funcs,