diff options
| author | Dmitry Osipenko <dmitry.osipenko@collabora.com> | 2022-11-10 23:13:45 +0300 |
|---|---|---|
| committer | Dmitry Osipenko <dmitry.osipenko@collabora.com> | 2022-11-11 23:49:47 +0300 |
| commit | 39ce252918712180f5a64853920a320981dac94b (patch) | |
| tree | 276027d84b0c6b8e65c8c3917068279b08561707 /drivers/gpu/drm/omapdrm | |
| parent | 8526e973647e1bf77dadf894a36aefd4fd1b8a3f (diff) | |
| download | linux-39ce252918712180f5a64853920a320981dac94b.tar.xz | |
drm: Assert held reservation lock for dma-buf mmapping
When userspace mmaps dma-buf's fd, the dma-buf reservation lock must be
held. Add locking sanity checks to the dma-buf mmaping callbacks of DRM
drivers to ensure that the locking assumptions won't regress in future.
Suggested-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Acked-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221110201349.351294-3-dmitry.osipenko@collabora.com
Diffstat (limited to 'drivers/gpu/drm/omapdrm')
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c b/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c index 8e194dbc9506..3abc47521b2c 100644 --- a/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c +++ b/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c @@ -66,6 +66,8 @@ static int omap_gem_dmabuf_mmap(struct dma_buf *buffer, struct drm_gem_object *obj = buffer->priv; int ret = 0; + dma_resv_assert_held(buffer->resv); + ret = drm_gem_mmap_obj(obj, omap_gem_mmap_size(obj), vma); if (ret < 0) return ret; |