gpu: host1x: Forbid RESTART opcode in the firewall

The RESTART opcode terminates the gather and restarts the CDMA fetching
from a specified word << 2 relative to the CDMA start address. That
shouldn't be allowed to be done by userspace.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Erik Faye-Lund <kusmabite@gmail.com>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/drivers/gpu/host1x/job.c b/drivers/gpu/host1x/job.c
index a911de6386b4..54230ec4f81e 100644
--- a/drivers/gpu/host1x/job.c
+++ b/drivers/gpu/host1x/job.c
@@ -495,7 +495,6 @@ static int validate(struct host1x_firewall *fw, struct host1x_job_gather *g)
                                 goto out;
                         break;
                 case 4:
-                case 5:
                 case 14:
                         break;
                 default: