You have drm_dev->struct_mutex grabbed before ->mmap_sem in exynos_drm_gem_mmap_ioctl() and after - in exynos_drm_gem_fault() (since ->fault() is always called with ->mmap_sem held). Looks like a garden-variety AB-BA deadlock... Incidentally, what should happen if another process shares the same opened file (e.g. inherited over fork()) and does mmap() just as we have ->f_op switched? _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
