From: Dmitry Osipenko <digetx@gmail.com>
Date: Wed, 14 Jun 2017 23:18:36 +0000 (+0300)
Subject: gpu: host1x: Forbid RESTART opcode in the firewall
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=ef81624994845a50e90c6a0ff57f17d1c96bff78;p=linux.git

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>
---

diff --git a/drivers/gpu/host1x/job.c b/drivers/gpu/host1x/job.c
index a911de6386b47..54230ec4f81e3 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: