drm: ditch strange DRIVER_DMA_QUEUE only error bail-out

Only one driver (i810) even sets that flag. Now the actual locking
code uncoditionally promotes lock->context to an unsigned int.

Closer inspection of the userspace reveals that the drm lock context
is defined as an unsigned int (at least on linux). I suspect we just
have a strange case of signedness confusion going on.

Tested on my i815, doesn't seem to break anything.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 0 insertions, 4 deletions

diff --git a/drivers/gpu/drm/drm_lock.c b/drivers/gpu/drm/drm_lock.c
index 521152041691..32039553e172 100644
--- a/drivers/gpu/drm/drm_lock.c
+++ b/drivers/gpu/drm/drm_lock.c
@@ -70,10 +70,6 @@ int drm_lock(struct drm_device *dev, void *data, struct drm_file *file_priv)
                   lock->context, task_pid_nr(current),
                   master->lock.hw_lock->lock, lock->flags);
 
-        if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE))
-                if (lock->context < 0)
-                        return -EINVAL;
-
         add_wait_queue(&master->lock.lock_queue, &entry);
         spin_lock_bh(&master->lock.spinlock);
         master->lock.user_waiters++;