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[v3,13/20] gpu: host1x: Forbid RESTART opcode in the firewall

Message ID a7ddefaaf4ac7d3bdba46043ba31facd76ac607c.1497480757.git.digetx@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Dmitry Osipenko June 14, 2017, 11:18 p.m. UTC 
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>
---
 drivers/gpu/host1x/job.c | 1 -
 1 file changed, 1 deletion(-)
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Patch

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: