diff options
| author | Gurchetan Singh <gurchetansingh@chromium.org> | 2020-02-25 03:07:59 +0300 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2020-02-25 11:48:42 +0300 |
| commit | d2a983b220ac6628c53e4cf27a7335d1d29ce5e9 (patch) | |
| tree | 3cf52944bdec5e786c8b7767b8c4567cc5bb77dc /drivers/gpu/drm/virtio/virtgpu_ioctl.c | |
| parent | 40cadedd20a5fefba7ebca7cee7a8743a55e2509 (diff) | |
| download | linux-d2a983b220ac6628c53e4cf27a7335d1d29ce5e9.tar.xz | |
drm/virtio: track whether or not a context has been initiated
Use an boolean variable to track whether a context has been
initiated.
v5: Fix possible race and sleep via mutex (olv)
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20200225000800.2966-3-gurchetansingh@chromium.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/virtio/virtgpu_ioctl.c')
| -rw-r--r-- | drivers/gpu/drm/virtio/virtgpu_ioctl.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c index 00ef9fd3fbf6..ec38cf5573aa 100644 --- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c +++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c @@ -40,10 +40,18 @@ void virtio_gpu_create_context(struct drm_device *dev, struct virtio_gpu_fpriv *vfpriv = file->driver_priv; char dbgname[TASK_COMM_LEN]; + mutex_lock(&vfpriv->context_lock); + if (vfpriv->context_created) + goto out_unlock; + get_task_comm(dbgname, current); virtio_gpu_cmd_context_create(vgdev, vfpriv->ctx_id, strlen(dbgname), dbgname); virtio_gpu_notify(vgdev); + vfpriv->context_created = true; + +out_unlock: + mutex_unlock(&vfpriv->context_lock); } static int virtio_gpu_map_ioctl(struct drm_device *dev, void *data, |