[PATCH 15/17] drm/radeon: use rcu waits in some ioctls

[Maarten Lankhorst]

Signed-off-by: Maarten Lankhorst <maarten.lankhorst at canonical.com>
---
 drivers/gpu/drm/radeon/radeon_gem.c |   19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_gem.c 
b/drivers/gpu/drm/radeon/radeon_gem.c
index d09650c1d720..7ba883843668 100644
--- a/drivers/gpu/drm/radeon/radeon_gem.c
+++ b/drivers/gpu/drm/radeon/radeon_gem.c
@@ -107,9 +107,12 @@ static int radeon_gem_set_domain(struct drm_gem_object 
*gobj,
        }
        if (domain == RADEON_GEM_DOMAIN_CPU) {
                /* Asking for cpu access wait for object idle */
-               r = radeon_bo_wait(robj, NULL, false);
-               if (r) {
-                       printk(KERN_ERR "Failed to wait for object !\n");
+               r = reservation_object_wait_timeout_rcu(robj->tbo.resv, true, 
true, 30 * HZ);
+               if (!r)
+                       r = -EBUSY;
+
+               if (r < 0 && r != -EINTR) {
+                       printk(KERN_ERR "Failed to wait for object: %i\n", r);
                        return r;
                }
        }
@@ -357,14 +360,20 @@ int radeon_gem_wait_idle_ioctl(struct drm_device *dev, 
void *data,
        struct drm_radeon_gem_wait_idle *args = data;
        struct drm_gem_object *gobj;
        struct radeon_bo *robj;
-       int r;
+       int r = 0;
+       long ret;

        gobj = drm_gem_object_lookup(dev, filp, args->handle);
        if (gobj == NULL) {
                return -ENOENT;
        }
        robj = gem_to_radeon_bo(gobj);
-       r = radeon_bo_wait(robj, NULL, false);
+       ret = reservation_object_wait_timeout_rcu(robj->tbo.resv, true, true, 
30 * HZ);
+       if (ret == 0)
+               r = -EBUSY;
+       else if (ret < 0)
+               r = ret;
+
        /* callback hw specific functions if any */
        if (rdev->asic->ioctl_wait_idle)
                robj->rdev->asic->ioctl_wait_idle(rdev, robj);