The introduction of: drm/framebuffer: Add framebuffer debugfs file broke vgem. That patch assumed that all drivers had initialized the dev->mode_config.fb_lock mutex which happens in drm_mode_config_init(). vgem doesn't need to call drm_mode_config_init().
Fix this by only creating the framebuffer debugfs file for modesetting drivers. Fixes: 45d58b40292b ("drm/framebuffer: Add framebuffer debugfs file") Suggested-by: Chris Wilson <ch...@chris-wilson.co.uk> Signed-off-by: Noralf Trønnes <nor...@tronnes.org> --- drivers/gpu/drm/drm_debugfs.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c index 550f29de6c1f..b2482818fee8 100644 --- a/drivers/gpu/drm/drm_debugfs.c +++ b/drivers/gpu/drm/drm_debugfs.c @@ -158,10 +158,12 @@ int drm_debugfs_init(struct drm_minor *minor, int minor_id, } } - ret = drm_framebuffer_debugfs_init(minor); - if (ret) { - DRM_ERROR("Failed to create framebuffer debugfs file\n"); - return ret; + if (drm_core_check_feature(dev, DRIVER_MODESET)) { + ret = drm_framebuffer_debugfs_init(minor); + if (ret) { + DRM_ERROR("Failed to create framebuffer debugfs file\n"); + return ret; + } } if (dev->driver->debugfs_init) { -- 2.14.2 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel