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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-10-05 14:21:43 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-10-05 15:29:08 +0200 |
| commit | 56a76c0123d6cb034975901c80fce2627338ef9e (patch) | |
| tree | bfffd4b02977d612a3d35e73f79ce195de5ffe0c | |
| parent | drm/bridge: Call drm_connector_cleanup directly (diff) | |
| download | linux-56a76c0123d6cb034975901c80fce2627338ef9e.tar.xz linux-56a76c0123d6cb034975901c80fce2627338ef9e.zip | |
drm/prime: Pass the right module owner through to dma_buf_export()
dma_buf_export() adds a reference to the owning module to the dmabuf (to
prevent the driver from being unloaded whilst a third party still refers
to the dmabuf). However, drm_gem_prime_export() was passing its own
THIS_MODULE (i.e. drm.ko) rather than the driver. Extract the right
owner from the device->fops instead.
v2: Use C99 initializers to zero out unset elements of
dma_buf_export_info
v3: Extract the right module from dev->fops.
Testcase: igt/vgem_basic/unload
Reported-by: Petri Latvala <petri.latvala@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Petri Latvala <petri.latvala@intel.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: stable@vger.kernel.org
Tested-by: Petri Latvala <petri.latvala@intel.com>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161005122145.1507-1-chris@chris-wilson.co.uk
| -rw-r--r-- | drivers/gpu/drm/drm_prime.c | 17 | ||||
| -rw-r--r-- | include/drm/drmP.h | 3 |
2 files changed, 12 insertions, 8 deletions
diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c index 57201d68cf61..80907b34d857 100644 --- a/drivers/gpu/drm/drm_prime.c +++ b/drivers/gpu/drm/drm_prime.c @@ -397,14 +397,17 @@ static const struct dma_buf_ops drm_gem_prime_dmabuf_ops = { * using the PRIME helpers. */ struct dma_buf *drm_gem_prime_export(struct drm_device *dev, - struct drm_gem_object *obj, int flags) + struct drm_gem_object *obj, + int flags) { - DEFINE_DMA_BUF_EXPORT_INFO(exp_info); - - exp_info.ops = &drm_gem_prime_dmabuf_ops; - exp_info.size = obj->size; - exp_info.flags = flags; - exp_info.priv = obj; + struct dma_buf_export_info exp_info = { + .exp_name = KBUILD_MODNAME, /* white lie for debug */ + .owner = dev->driver->fops->owner, + .ops = &drm_gem_prime_dmabuf_ops, + .size = obj->size, + .flags = flags, + .priv = obj, + }; if (dev->driver->gem_prime_res_obj) exp_info.resv = dev->driver->gem_prime_res_obj(obj); diff --git a/include/drm/drmP.h b/include/drm/drmP.h index 0e99669159c1..81fcd553edf7 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -1012,7 +1012,8 @@ static inline int drm_debugfs_remove_files(const struct drm_info_list *files, #endif extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev, - struct drm_gem_object *obj, int flags); + struct drm_gem_object *obj, + int flags); extern int drm_gem_prime_handle_to_fd(struct drm_device *dev, struct drm_file *file_priv, uint32_t handle, uint32_t flags, int *prime_fd); |