Am 16.04.2013 18:26, schrieb alexdeucher at gmail.com:
> From: Jerome Glisse <jglisse at redhat.com>
>
> This is slightly cleaned up version of Jerome's patch.
> There seems to be an issue tracking the last flush of
> the VM which results in hangs in certain cases when
> VM is used. For now just flush the VM for every IB.
>
> Fixes:
> https://bugs.freedesktop.org/show_bug.cgi?id=62959
> https://bugs.freedesktop.org/show_bug.cgi?id=62997
>
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Reviewed-by: Christian K?nig <christian.koenig at amd.com>
> Cc: stable at vger.kernel.org
> ---
> drivers/gpu/drm/radeon/radeon_ring.c | 3 ++-
> 1 files changed, 2 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/radeon_ring.c
> b/drivers/gpu/drm/radeon/radeon_ring.c
> index 31e47d8..e17faa7 100644
> --- a/drivers/gpu/drm/radeon/radeon_ring.c
> +++ b/drivers/gpu/drm/radeon/radeon_ring.c
> @@ -180,7 +180,8 @@ int radeon_ib_schedule(struct radeon_device *rdev, struct
> radeon_ib *ib,
> radeon_semaphore_free(rdev, &ib->semaphore, NULL);
> }
> /* if we can't remember our last VM flush then flush now! */
> - if (ib->vm && !ib->vm->last_flush) {
> + /* XXX figure out why we have to flush for every IB */
> + if (ib->vm /*&& !ib->vm->last_flush*/) {
> radeon_ring_vm_flush(rdev, ib->ring, ib->vm);
> }
> if (const_ib) {
