From 633873e6cb884f903468f81f2e8df8975877fadd Mon Sep 17 00:00:00 2001 From: Emil Velikov Date: Fri, 26 Oct 2018 11:05:50 +0100 Subject: [PATCH] drm/vkms: provide a parent device to drm_dev_init() Earlier commit updated the vgem driver to improve the topology, by passing a platform device as parent to drm_dev_init(). Shortly afterwords we updated the core function to BUG() in order to catch any buggy drivers passing NULL as parent. While I missed the vkms driver (as the patch predates vkms by a few months), the BUG caught the issue within couple of hours. Swap the drm_dev_init <> platform_device_register_simple order, to the driver back to life. Fixes: f08877e79485 ("drm: BUG_ON if passing NULL parent to drm_dev_init") Cc: Daniel Vetter Cc: Deepak Sharma Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Sean Paul Cc: Haneen Mohammed Cc: Rodrigo Siqueira Reported-by: Daniel Vetter Signed-off-by: Emil Velikov Reviewed-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20181026100550.625-1-emil.l.velikov@gmail.com --- drivers/gpu/drm/vkms/vkms_drv.c | 21 +++++++++++---------- 1 file changed, 11 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c index 07cfde1b4132..a3d57e0f5ee5 100644 --- a/drivers/gpu/drm/vkms/vkms_drv.c +++ b/drivers/gpu/drm/vkms/vkms_drv.c @@ -108,17 +108,18 @@ static int __init vkms_init(void) if (!vkms_device) return -ENOMEM; - ret = drm_dev_init(&vkms_device->drm, &vkms_driver, NULL); - if (ret) - goto out_free; - vkms_device->platform = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0); if (IS_ERR(vkms_device->platform)) { ret = PTR_ERR(vkms_device->platform); - goto out_fini; + goto out_free; } + ret = drm_dev_init(&vkms_device->drm, &vkms_driver, + &vkms_device->platform->dev); + if (ret) + goto out_unregister; + vkms_device->drm.irq_enabled = true; ret = drm_vblank_init(&vkms_device->drm, 1); @@ -129,20 +130,20 @@ static int __init vkms_init(void) ret = vkms_modeset_init(vkms_device); if (ret) - goto out_unregister; + goto out_fini; ret = drm_dev_register(&vkms_device->drm, 0); if (ret) - goto out_unregister; + goto out_fini; return 0; -out_unregister: - platform_device_unregister(vkms_device->platform); - out_fini: drm_dev_fini(&vkms_device->drm); +out_unregister: + platform_device_unregister(vkms_device->platform); + out_free: kfree(vkms_device); return ret; -- 2.11.0