From: Mikko Perttunen <mperttunen@nvidia.com>
Date: Thu, 19 Jan 2023 15:39:01 +0200
Subject: [PATCH] drm/tegra: firewall: Check for is_addr_reg existence in IMM
 check
References: bsc#1012628
Patch-mainline: 6.2.3
Git-commit: 1b5c09de25e8c08655c270a70e5e74e93b6bad1f

[ Upstream commit 1b5c09de25e8c08655c270a70e5e74e93b6bad1f ]

In the IMM opcode check, don't call is_addr_reg if it's not set.

Fixes: 8cc95f3fd35e ("drm/tegra: Add job firewall")
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/gpu/drm/tegra/firewall.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/tegra/firewall.c b/drivers/gpu/drm/tegra/firewall.c
index 1824d2db..d53f890f 100644
--- a/drivers/gpu/drm/tegra/firewall.c
+++ b/drivers/gpu/drm/tegra/firewall.c
@@ -97,6 +97,9 @@ static int fw_check_regs_imm(struct tegra_drm_firewall *fw, u32 offset)
 {
 	bool is_addr;
 
+	if (!fw->client->ops->is_addr_reg)
+		return 0;
+
 	is_addr = fw->client->ops->is_addr_reg(fw->client->base.dev, fw->class,
 					       offset);
 	if (is_addr)
-- 
2.35.3