From 77a8c8c1563ba4b35a0f21c0bc0b8f167b55e5a9 Mon Sep 17 00:00:00 2001
From: Rakibul Hassan <rakibulh@nvidia.com>
Date: Sat, 1 Nov 2025 01:38:04 +0000
Subject: [PATCH] platform: tegra: rtcpu: ivc bus check null

Add a check before dereferencing pointer.

Bug 5597251

Change-Id: Ied1bc79ad631a44bbf9f00f497cfc6e85a62a579
Signed-off-by: Rakibul Hassan <rakibulh@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3480970
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Narendra Kondapalli <nkondapalli@nvidia.com>
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: Vincent Chung <vincentc@nvidia.com>
Reviewed-by: Akihiro Mizusawa <amizusawa@nvidia.com>
---
 drivers/platform/tegra/rtcpu/ivc-bus.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/platform/tegra/rtcpu/ivc-bus.c b/drivers/platform/tegra/rtcpu/ivc-bus.c
index c7b01146..616833c0 100644
--- a/drivers/platform/tegra/rtcpu/ivc-bus.c
+++ b/drivers/platform/tegra/rtcpu/ivc-bus.c
@@ -758,6 +758,11 @@ static int tegra_ivc_bus_ready_child(struct device *dev, void *data)
 		if (drv != NULL) {
 			rcu_read_lock();
 			ops = rcu_dereference(chan->ops);
+			if (ops == NULL) {
+				dev_warn(dev, "channel ops not set\n");
+				rcu_read_unlock();
+				return 0;
+			}
 			if (ops->ready != NULL)
 				ops->ready(chan, is_ready);
 			rcu_read_unlock();