From 40647e45b92b1da599048332ec8fbd40d8d29457 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Wed, 27 Apr 2016 09:20:18 +0200 Subject: drm: Hide master MAP cleanup in drm_bufs.c And again make sure it's a no-op for modern drivers. Another case of dev->struct_mutex gone for modern drivers! Note that the entirety of the legacy addmap interface is now protected by DRIVER_MODESET. Note that just auditing kernel code is not enough, since userspace loves to set up legacy maps on it's own for various things - with ums userspace and kernel space share control over resources. v2: Also add a DRIVER_* check like for all other maps functions to really short-circuit the code. And give drm_legacy_rmmap used by the dev unregister code the same treatment. v3: - remove redundant return; (Alex, Chris) - don't special case nouveau with DRIVER_KMS_LEGACY_CONTEXT. v4: Again special case nouveau. The problem is not directly in the ddx, but that it calls dri1 functions from the X server. And those do call drmAddMap. Fixed only in commit b1a630b48210d6a3c44994fce1b73273000ace5c Author: Dave Airlie Date: Wed Nov 7 14:45:14 2012 +1000 nouveau: drop DRI1 device open interface. Acked-by: Alex Deucher Reviewed-by: Chris Wilson Cc: Alex Deucher Cc: Chris Wilson Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/1461741618-12679-1-git-send-email-daniel.vetter@ffwll.ch --- drivers/gpu/drm/drm_bufs.c | 27 ++++++++++++++++++++++----- 1 file changed, 22 insertions(+), 5 deletions(-) (limited to 'drivers/gpu/drm/drm_bufs.c') diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c index e8a12a4fd400..9b34158c0f77 100644 --- a/drivers/gpu/drm/drm_bufs.c +++ b/drivers/gpu/drm/drm_bufs.c @@ -542,18 +542,35 @@ int drm_legacy_rmmap_locked(struct drm_device *dev, struct drm_local_map *map) } EXPORT_SYMBOL(drm_legacy_rmmap_locked); -int drm_legacy_rmmap(struct drm_device *dev, struct drm_local_map *map) +void drm_legacy_rmmap(struct drm_device *dev, struct drm_local_map *map) { - int ret; + if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && + drm_core_check_feature(dev, DRIVER_MODESET)) + return; mutex_lock(&dev->struct_mutex); - ret = drm_legacy_rmmap_locked(dev, map); + drm_legacy_rmmap_locked(dev, map); mutex_unlock(&dev->struct_mutex); - - return ret; } EXPORT_SYMBOL(drm_legacy_rmmap); +void drm_legacy_master_rmmaps(struct drm_device *dev, struct drm_master *master) +{ + struct drm_map_list *r_list, *list_temp; + + if (drm_core_check_feature(dev, DRIVER_MODESET)) + return; + + mutex_lock(&dev->struct_mutex); + list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { + if (r_list->master == master) { + drm_legacy_rmmap_locked(dev, r_list->map); + r_list = NULL; + } + } + mutex_unlock(&dev->struct_mutex); +} + /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on * the last close of the device, and this is necessary for cleanup when things * exit uncleanly. Therefore, having userland manually remove mappings seems -- cgit v1.2.3