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This contains a fix to restrict what lessee can do with masters and 

another one when waiting for timeouts on reservation objects.
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Merge tag 'drm-misc-next-fixes-2018-01-31' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

This contains a fix to restrict what lessee can do with masters and
another one when waiting for timeouts on reservation objects.

* tag 'drm-misc-next-fixes-2018-01-31' of git://anongit.freedesktop.org/drm/drm-misc:
  drm: Check for lessee in DROP_MASTER ioctl
  dma-buf: fix reservation_object_wait_timeout_rcu once more v2
This commit is contained in:
Dave Airlie 2018-02-01 11:34:47 +10:00
parent 559f17bec5 761e05a702
commit 7ec3c0957f
2 changed files with 11 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/dma-buf/reservation.c
View File

@ -471,13 +471,15 @@ long reservation_object_wait_timeout_rcu(struct reservation_object *obj,
unsigned long timeout)
{
struct dma_fence *fence;
unsigned seq, shared_count, i = 0;
unsigned seq, shared_count;
long ret = timeout ? timeout : 1;
int i;
retry:
shared_count = 0;
seq = read_seqcount_begin(&obj->seq);
rcu_read_lock();
i = -1;
fence = rcu_dereference(obj->fence_excl);
if (fence && !test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) {
@ -493,14 +495,14 @@ retry:
fence = NULL;
}
if (!fence && wait_all) {
if (wait_all) {
struct reservation_object_list *fobj =
rcu_dereference(obj->fence);
if (fobj)
shared_count = fobj->shared_count;
for (i = 0; i < shared_count; ++i) {
for (i = 0; !fence && i < shared_count; ++i) {
struct dma_fence *lfence = rcu_dereference(fobj->shared[i]);
if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT,

6
drivers/gpu/drm/drm_auth.c
View File

@ -230,6 +230,12 @@ int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
if (!dev->master)
goto out_unlock;
if (file_priv->master->lessor != NULL) {
DRM_DEBUG_LEASE("Attempt to drop lessee %d as master\n", file_priv->master->lessee_id);
ret = -EINVAL;
goto out_unlock;
}
ret = 0;
drm_drop_master(dev, file_priv);
out_unlock: