The vgem driver is currently registered independent of any actual device. Some usage of the dmabuf APIs require an actual device structure to do anything. Register a dummy platform device for use with dmabuf.
Signed-off-by: Laura Abbott labbott@redhat.com --- v2: Store the platform device in the platformdev field instead of the regular device structure. --- drivers/gpu/drm/vgem/vgem_drv.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c index a1f42d1..1b02e56 100644 --- a/drivers/gpu/drm/vgem/vgem_drv.c +++ b/drivers/gpu/drm/vgem/vgem_drv.c @@ -335,11 +335,20 @@ static int __init vgem_init(void) int ret;
vgem_device = drm_dev_alloc(&vgem_driver, NULL); - if (IS_ERR(vgem_device)) { - ret = PTR_ERR(vgem_device); + if (IS_ERR(vgem_device)) + return PTR_ERR(vgem_device); + + vgem_device->platformdev = platform_device_register_simple("vgem", + -1, NULL, 0); + + if (!vgem_device->platformdev) { + ret = -ENODEV; goto out; }
+ dma_coerce_mask_and_coherent(&vgem_device->platformdev->dev, + DMA_BIT_MASK(64)); + ret = drm_dev_register(vgem_device, 0); if (ret) goto out_unref; @@ -347,13 +356,15 @@ static int __init vgem_init(void) return 0;
out_unref: - drm_dev_unref(vgem_device); + platform_device_unregister(vgem_device->platformdev); out: + drm_dev_unref(vgem_device); return ret; }
static void __exit vgem_exit(void) { + platform_device_unregister(vgem_device->platformdev); drm_dev_unregister(vgem_device); drm_dev_unref(vgem_device); }