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| author | David Herrmann <dh.herrmann@gmail.com> | 2013-10-02 11:23:37 +0200 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2013-10-09 07:55:09 +0200 |
| commit | 0dc8fe5985e01f238e7dc64ff1733cc0291811e8 (patch) | |
| tree | 977b912c062fee10c10e39082546a5ecacd39792 /drivers/gpu/drm/drm_stub.c | |
| parent | drm: move drm_lastclose() to drm_fops.c (diff) | |
| download | linux-0dc8fe5985e01f238e7dc64ff1733cc0291811e8.tar.xz linux-0dc8fe5985e01f238e7dc64ff1733cc0291811e8.zip | |
drm: introduce drm_dev_free() to fix error paths
The error paths in DRM bus drivers currently leak memory as they don't
correctly revert drm_dev_alloc(). Introduce drm_dev_free() to free DRM
devices which haven't been registered, yet.
We must be careful not to introduce any side-effects with cleanups done in
drm_dev_free(). drm_ht_remove(), drm_ctxbitmap_cleanup() and
drm_gem_destroy() are all fine in that regard.
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/drm_stub.c')
| -rw-r--r-- | drivers/gpu/drm/drm_stub.c | 35 |
1 files changed, 25 insertions, 10 deletions
diff --git a/drivers/gpu/drm/drm_stub.c b/drivers/gpu/drm/drm_stub.c index 432994aafc3b..3b5b07482de8 100644 --- a/drivers/gpu/drm/drm_stub.c +++ b/drivers/gpu/drm/drm_stub.c @@ -363,7 +363,6 @@ static void drm_unplug_minor(struct drm_minor *minor) */ void drm_put_dev(struct drm_device *dev) { - struct drm_driver *driver; struct drm_map_list *r_list, *list_temp; DRM_DEBUG("\n"); @@ -372,7 +371,6 @@ void drm_put_dev(struct drm_device *dev) DRM_ERROR("cleanup called no dev\n"); return; } - driver = dev->driver; drm_lastclose(dev); @@ -386,9 +384,6 @@ void drm_put_dev(struct drm_device *dev) list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) drm_rmmap(dev, r_list->map); - drm_ht_remove(&dev->map_hash); - - drm_ctxbitmap_cleanup(dev); if (drm_core_check_feature(dev, DRIVER_MODESET)) drm_put_minor(&dev->control); @@ -396,14 +391,11 @@ void drm_put_dev(struct drm_device *dev) if (dev->render) drm_put_minor(&dev->render); - if (driver->driver_features & DRIVER_GEM) - drm_gem_destroy(dev); - drm_put_minor(&dev->primary); list_del(&dev->driver_item); - kfree(dev->devname); - kfree(dev); + + drm_dev_free(dev); } EXPORT_SYMBOL(drm_put_dev); @@ -502,6 +494,29 @@ err_free: EXPORT_SYMBOL(drm_dev_alloc); /** + * drm_dev_free - Free DRM device + * @dev: DRM device to free + * + * Free a DRM device that has previously been allocated via drm_dev_alloc(). + * You must not use kfree() instead or you will leak memory. + * + * This must not be called once the device got registered. Use drm_put_dev() + * instead, which then calls drm_dev_free(). + */ +void drm_dev_free(struct drm_device *dev) +{ + if (dev->driver->driver_features & DRIVER_GEM) + drm_gem_destroy(dev); + + drm_ctxbitmap_cleanup(dev); + drm_ht_remove(&dev->map_hash); + + kfree(dev->devname); + kfree(dev); +} +EXPORT_SYMBOL(drm_dev_free); + +/** * drm_dev_register - Register DRM device * @dev: Device to register * |